{"title":"Optical Tubes Only (OTA)","description":null,"products":[{"product_id":"celestron-36-cm-rasa-ota-cge-dovetail","title":"Celestron 36 cm RASA OTA  - CGE Dovetail","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e355.6mm (14\") Rowe-Ackermann Schmidt Astrograph\u003c\/li\u003e\n\u003cli\u003eUltra-fast f\/2.2 focal ratio with 790mm focal length\u003c\/li\u003e\n\u003cli\u003eCovers a 60.1mm image circle, with a usable field up to 70mm\u003c\/li\u003e\n\u003cli\u003eNew Ultra-Stable Focus System (USFS) eliminates image shift\u003c\/li\u003e\n\u003cli\u003eExtended wavelength range from 400 nm to 900 nm\u003c\/li\u003e\n\u003cli\u003eWeighs 75 lbs (34.02 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron 36 cm Rowe-Ackermann Schmidt Astrograph (RASA 36) V2\u003c\/h2\u003e\n\u003cp\u003eThe Celestron RASA 36 V2 combines a massive 355.6mm (14\") aperture with an incredibly fast f\/2.2 optical system, delivering an unmatched combination of light-gathering power, speed, and field of view for professional and scientific applications. Its 790mm focal length produces a huge 60.1mm image circle, delivering spot sizes smaller than 6.3 μm RMS across the entire field of view. The optical design is optimized for an extended spectral range of 400-900 nm, capturing more signal than typical visual systems and boosting the light-gathering power, which already stands at 2581 times that of the human eye.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAn f\/2.2 System with a 70mm Usable Field\u003c\/h3\u003e\n\u003cp\u003eThe RASA design is engineered for one purpose: wide-field imaging at unprecedented speed. At f\/2.2, you can achieve exposure times that are fractions of what's required on slower systems, enabling the capture of faint details in nebulae and galaxies or tracking fast-moving satellites. The Rowe-Ackermann Schmidt optical layout produces a completely flat focal plane, free from coma, astigmatism, and field curvature, eliminating the need for additional correctors.\u003c\/p\u003e\n\u003cp\u003eWith an optimized image circle of 60.1mm and a usable field of 70mm, the RASA 36 fully illuminates the largest professional CMOS and CCD sensors available. This vast, corrected field allows you to capture enormous targets like the entire Veil Nebula complex or the Andromeda Galaxy (M31) in a single frame with stunning resolution from edge to edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Ultra-Stable Focus System (USFS) for Zero Image Shift\u003c\/h3\u003e\n\u003cp\u003eA key upgrade in the V2 is the Ultra-Stable Focus System (USFS). This system uses a precision linear ball bearing to support and guide the primary mirror during focusing. This robust design virtually eliminates focus shift and mirror flop—unwanted lateral movement of the mirror that can ruin an exposure, especially during automated focusing routines or when slewing across the sky.\u003c\/p\u003e\n\u003cp\u003eThe result is a rock-solid focusing mechanism that holds collimation and maintains a perfectly centered image, which is critical for scientific photometry, astrometry, and deep-sky imaging. The USFS is also compatible with the optional Celestron Focus Motor for complete remote operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 75 lb OTA with Integrated Cooling and Support\u003c\/h3\u003e\n\u003cp\u003eThe RASA 36 is a professional instrument, and its mechanical systems are built to match. The 75 lb aluminum optical tube is supported by dual CGE\/Losmandy-style dovetail bars, providing secure mounting and ample surface area for attaching guide scopes and other accessories. Integrated carrying handles make transport and mounting more manageable.\u003c\/p\u003e\n\u003cp\u003eTo ensure peak optical performance, an integrated 12V DC MagLev fan accelerates cooldown to ambient temperature, minimizing tube currents that can degrade image sharpness. The fan pulls air through micromesh-filtered vents, preventing dust from settling on the primary mirror and corrector plate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging with 77.5mm of Back Focus for Large Format Sensors\u003c\/h3\u003e\n\u003cp\u003eThe RASA 36 is designed for seamless integration with modern imaging systems. It provides a generous 77.5mm of back focus from the top of the threaded collar, accommodating a wide range of large-format cameras, filter wheels, and other accessories. With the included M48 camera adapter, the back focus is set to a standard 55mm, making it easy to connect many popular cameras out of the box. This flexibility ensures you can achieve the correct spacing for optimal performance across the entire 70mm usable field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRASA 36 vs. Smaller Models: The 355.6mm Aperture Advantage\u003c\/h3\u003e\n\u003cp\u003eAs the largest RASA Celestron manufactures, the RASA 36 offers a significant step up in capability. Its 355.6mm aperture provides a major boost in both light-gathering power and resolution compared to smaller models like the RASA 11. This increase in aperture allows you to resolve finer details, with a Dawes' limit of just 0.36 arc seconds, and capture fainter objects in the same amount of time.\u003c\/p\u003e\n\u003cp\u003eThis power comes with the trade-off of size and weight; at 75 lbs, the RASA 36 requires a high-capacity, observatory-class mount. For space surveillance, scientific research, or advanced imagers who need the ultimate in speed and resolution, the RASA 36 is in a class of its own.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the RASA 36 V2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe RASA 36 V2 optical tube weighs 75 lbs (34.02 kg). You will need a robust, observatory-class equatorial mount with a payload capacity of at least 100 lbs to handle the OTA and a full imaging train. Precise tracking and guiding are essential to take advantage of the instrument's high resolution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the Ultra-Stable Focus System (USFS) on the RASA 36?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe USFS is a mechanical upgrade that supports the primary mirror on a precision linear ball bearing. This system prevents the mirror from tilting or shifting during focusing (\u003cstrong\u003efocus shift\u003c\/strong\u003e) or when the telescope points to different parts of the sky (\u003cstrong\u003emirror flop\u003c\/strong\u003e). It ensures your target stays perfectly centered and in focus, which is critical for automated imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use my DSLR or mirrorless camera with the RASA 36 V2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile physically possible with the correct adapters, DSLR and mirrorless camera bodies are often too large and will obstruct a significant portion of the telescope's 355.6mm aperture. The RASA 36 is designed for use with cylindrical, low-profile dedicated astronomy cameras to minimize this central obstruction, which is already 158mm wide.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the RASA 36's f\/2.2 speed affect imaging the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe RASA 36's f\/2.2 speed and 790mm focal length allow you to capture the entire Andromeda Galaxy (M31) in a single frame with a large sensor. You can acquire deep, high-signal data in a fraction of the time needed for a typical f\/7 or f\/10 system. A single 5-minute exposure on the RASA 36 can reveal details that might take over 30 minutes to capture on a slower telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the extended 400-900 nm wavelength range for the RASA 36?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eMost telescopes are corrected for visible light (400-700 nm). The RASA 36's optics are designed to focus light well into the near-infrared (up to 900 nm). Modern CMOS and CCD sensors are sensitive to this light, so the extended range allows the telescope to gather a brighter signal, effectively increasing its sensitivity and further reducing exposure times.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a large format camera. How do I attach it to the RASA 36 V2 to use the full 70mm field?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo utilize the full 70mm usable field, you will likely need a custom camera adapter. The RASA 36 has a native back focus of 77.5mm from the threaded collar. You'll need to calculate the distance required by your specific camera, filter wheel, and any other accessories to have an adapter machined that places your sensor at this focal plane.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eOptical Tube Info\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eRowe-Ackermann Schmidt Astrograph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e355.6mm (14\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e790mm (31.1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/2.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e60.1mm (2.36\") Ø, 4.4°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseable Field\u003c\/td\u003e\n\u003ctd\u003e70mm (2.75\") Ø, 5.1°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Obstruction Diameter\u003c\/td\u003e\n\u003ctd\u003e158mm (6.22\") (44% of aperture diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e2581x (Compared to human eye)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.39 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.36 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 6.3 μm RMS across FOV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 – 900 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced aluminum, XLT Multi-Coated throughout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-axis Illumination\u003c\/td\u003e\n\u003ctd\u003e83% at 30mm (1.18\") off-axis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Window\u003c\/td\u003e\n\u003ctd\u003e104mm (4.09\") Ø\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus (from collar)\u003c\/td\u003e\n\u003ctd\u003e77.5mm (3.05\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus (with adapter)\u003c\/td\u003e\n\u003ctd\u003e55mm (2.16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eUltra-Stable Focus System (USFS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eMechanical Info\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e1079.5mm (42.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e406.4mm (16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e75 lbs (34.02 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther Features\u003c\/td\u003e\n\u003ctd\u003eVentilation fan, dual dovetail mounting bars\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eRASA 36 V2 Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eM48 Camera Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFan Battery Pack\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/s3.amazonaws.com\/celestron-site-support-files\/support_files\/RASA_36_Manual_52366_WEB_rev1.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-\n16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload RASA 36 Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron-RASA-Optics-Whitepaper.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload RASA Optics Whitepaper\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Telescope Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967155532061,"sku":"CEL-91078","price":20849.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron-36-cm-Rowe-Ackermann-Schmidt-Astrograph-RASA-36-Optical-Tube-Assembly-CGE-Dovetail-91077-1__49856.1594230331.1280.1280.jpg?v=1684337447"},{"product_id":"celestron-8-rasa-ota","title":"Celestron 8” RASA OTA","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e203mm (8\") Rowe-Ackermann Schmidt Astrograph\u003c\/li\u003e\n\u003cli\u003eIncredibly fast 400mm f\/2.0 optical system\u003c\/li\u003e\n\u003cli\u003e22mm optimized image circle for sharp stars edge-to-edge\u003c\/li\u003e\n\u003cli\u003eUltra-Stable Focus System mitigates mirror shift\u003c\/li\u003e\n\u003cli\u003eLightweight 17 lb optical tube for ultimate portability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron 8” Rowe-Ackermann Schmidt Astrograph (RASA 8)\u003c\/h2\u003e\n\u003cp\u003eThe Celestron 8” Rowe-Ackermann Schmidt Astrograph (RASA 8) combines a 203mm (8\") aperture with an exceptionally fast f\/2.0 optical system to create a premier wide-field imaging instrument. Its 400mm focal length captures vast swaths of the night sky, while its patented design delivers 843x the light gathering power of the human eye, enabling you to capture detailed deep-sky images in a fraction of the time required by conventional telescopes. The RASA 8 delivers pinpoint stars smaller than 2.3 μm RMS across its optimized 22mm image circle, all within an optical tube that weighs just 17 lbs (7.7 kg).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe RASA f\/2.0 Optical System: 843x Light Gathering Power\u003c\/h3\u003e\n\u003cp\u003eThe RASA 8’s f\/2.0 focal ratio is its defining feature, allowing you to use dramatically shorter exposure times to capture faint nebulae and galaxies. This speed, combined with today's sensitive CMOS cameras, makes a near-real-time observing experience possible through live stacking. The relatively short 400mm focal length lessens the demands on your equatorial mount's tracking, often eliminating the need for an autoguider entirely. StarBright XLT optical coatings ensure maximum light transmission across a wide 400-800 nm wavelength range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOptimized for CMOS \u0026amp; Mirrorless: A 22mm Flat-Field Image Circle\u003c\/h3\u003e\n\u003cp\u003eEngineered for modern cameras, the RASA 8 produces a flat, coma-free field across its 22mm optimized image circle, ensuring sharp stars from edge to edge on smaller CCD and color CMOS sensors. Performance remains strong across a useable field of 32mm, making it an excellent match for APS-C mirrorless cameras. An integrated filter mount within the optical path simplifies your imaging train. This astrograph is a dedicated imaging instrument and cannot be used with DSLRs or for visual observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eUltra-Stable Focuser and 17 lb Portability\u003c\/h3\u003e\n\u003cp\u003eCelestron's Ultra-Stable Focus System uses a precision linear ball bearing to support the primary mirror, preventing the lateral movement or \"mirror shift\" that can plague other designs during focusing or slewing. This ensures your focus is easier to achieve and holds firm throughout an imaging session. At only 17 lbs (7.7 kg), the RASA 8 optical tube is highly portable and pairs perfectly with a wide range of mid-capacity equatorial mounts, making it easy to transport to dark-sky sites.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir-Cooling System:\u003c\/strong\u003e An integrated 12V MagLev fan helps the optics reach thermal equilibrium quickly for the sharpest possible images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCGE Dovetail Bar:\u003c\/strong\u003e A wide, sturdy CGE-style dovetail provides a secure connection to your mount.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Adapters:\u003c\/strong\u003e Comes with 42mm T-thread and C-thread adapters to connect a wide variety of astronomical cameras.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRASA 8 vs. RASA 11: Portability and Sensor Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe RASA 8 offers the core benefits of the RASA design in a more compact and accessible package compared to its larger sibling, the RASA 11.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRASA 11 Advantage:\u003c\/strong\u003e With its 11\" aperture and 43.3mm image circle, the RASA 11 is built to illuminate large full-frame sensors (42mm diagonal) and offers greater light-gathering power for the most demanding imagers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRASA 8 Advantage:\u003c\/strong\u003e The RASA 8 weighs in at a mere 17 lbs, compared to the RASA 11's 43 lbs, making it far easier to mount, transport, and manage. Its 22mm optimized image circle is perfectly matched to the smaller, highly efficient sensors in today's most popular color CMOS and mirrorless cameras, providing a cost-effective entry into high-speed, wide-field astrophotography.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the RASA 8?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an optical tube weight of just 17 lbs (7.7 kg), the RASA 8 is compatible with a wide range of equatorial mounts. A mount with a payload capacity of 30 lbs or more is recommended to comfortably handle the OTA plus the weight of your camera and any accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use my DSLR camera with the RASA 8?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The RASA 8 is not compatible with DSLR cameras because the camera body is too large and would obstruct a significant portion of the telescope's aperture. It is designed specifically for smaller-bodied astronomical CMOS\/CCD cameras and mirrorless cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs autoguiding necessary with the RASA 8?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOften, it is not. The combination of the RASA 8's extremely fast f\/2.0 focal ratio (allowing for very short exposures) and its short 400mm focal length significantly reduces tracking accuracy demands on your mount. For many targets, you can achieve excellent results without the complexity of an autoguider.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between the 22mm optimized and 32mm usable image circles on the RASA 8?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e22mm optimized image circle\u003c\/strong\u003e is the area where the optical performance is highest, delivering spot sizes less than 2.3 μm RMS. The \u003cstrong\u003e32mm useable field\u003c\/strong\u003e extends this to accommodate larger sensors, like APS-C, with only minimal performance loss at the very edges of the frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the RASA 8 perform on the Andromeda Galaxy (M31) with an APS-C camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe RASA 8 is an exceptional instrument for the Andromeda Galaxy (M31). Its wide 400mm focal length will allow you to frame the entire galaxy and its companions (M32 and M110) comfortably on a typical APS-C sensor. The f\/2.0 speed means you can capture the faint outer dust lanes with much shorter total integration time than with a slower telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the RASA 8 for imaging planets like Jupiter or Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile possible, it is not ideal. The RASA 8 is a wide-field instrument with a short 400mm focal length, which will result in very small image scales for planets. Telescopes with much longer focal lengths (2000mm or more), like a Schmidt-Cassegrain, are better suited for capturing detailed planetary images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eRowe-Ackermann Schmidt Astrograph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e203mm (8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e400mm (15.74\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e22mm (.86\") Ø, 3.15°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseable Field\u003c\/td\u003e\n\u003ctd\u003e32mm (1.26\") Ø, 4.6°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2.3 μm RMS across image circle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Obstruction Diameter\u003c\/td\u003e\n\u003ctd\u003e93mm (3.66\") (46% of aperture)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e843x (Compared to human eye)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.68 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.57 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 - 800 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus (with included adapter)\u003c\/td\u003e\n\u003ctd\u003e25mm (.98\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus (from threaded collar)\u003c\/td\u003e\n\u003ctd\u003e29mm (1.14\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e628mm (24.7\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e235mm (9.3\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e17 lbs (7.7 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003ePrecision Bearing System (PBS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFeatures\u003c\/td\u003e\n\u003ctd\u003eAir-cooling system, integrated filter mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e8\" RASA Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e42mm T-thread Camera Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eC-thread Camera Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFan Battery Pack\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron_Rowe-Ackermann_Schmidt_Astrograph_8_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload RASA 8 Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron-RASA-Optics-Whitepaper.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7\n.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload RASA Whitepaper\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967155597597,"sku":"CEL-91073","price":3057.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron-8-inch-Rowe-Ackermann-Schmidt-Astrograph-RASA-8-Optical-Tube-Assembly-CGE-Dovetail-91073-1__83690.1594229272.1280.1280.jpg?v=1684337464"},{"product_id":"celestron-c11-ota-cge-dovetail","title":"Celestron C11 OTA  - CGE Dovetail","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e279.4mm (11\") Schmidt-Cassegrain Optical Tube Assembly\u003c\/li\u003e\n\u003cli\u003e2800mm Focal Length at an f\/10 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eResolving power of 0.42 arc seconds (Dawes Limit)\u003c\/li\u003e\n\u003cli\u003eStarBright XLT High-Transmission Optical Coatings\u003c\/li\u003e\n\u003cli\u003eFastar-compatible for f\/2 wide-field imaging\u003c\/li\u003e\n\u003cli\u003eWeighs 27.5 lbs and includes a CGE dovetail bar\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron C11 Optical Tube Assembly (CGE Dovetail)\u003c\/h2\u003e\n\u003cp\u003eThe Celestron C11 Optical Tube Assembly pairs a massive 279.4mm (11\") aperture with a powerful 2800mm focal length, delivering the light-gathering and resolving power needed for serious planetary and deep-sky observation. This classic f\/10 Schmidt-Cassegrain gathers 1593x more light than the human eye and reaches a limiting stellar magnitude of 14.7. With a Dawes resolution of 0.42 arc seconds, the C11 splits tight double stars and reveals fine detail in Jupiter's cloud bands and Saturn's rings. Despite its optical power, the aluminum tube weighs a manageable 27.5 lbs and measures just 610mm (24\") long, making it portable enough for trips to dark-sky sites.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e11\" Schmidt-Cassegrain: 0.42 Arc Second Planetary and Deep-Sky Views\u003c\/h3\u003e\n\u003cp\u003eWith 11 inches of aperture, the C11 optical tube is a formidable instrument for any celestial target. The long 2800mm focal length provides high magnification for planetary viewing, pushing up to 660x to resolve features like the Cassini Division in Saturn's rings or polar caps on Mars. Its theoretical resolving power of 0.42 arc seconds (Dawes Limit) allows you to separate stars that are impossibly close in smaller telescopes.\u003c\/p\u003e\n\u003cp\u003eFor deep-sky observers, the C11's light grasp reveals faint galaxy arms, resolves individual stars in globular clusters like the Hercules Cluster (M13), and shows structure in planetary nebulae. The included 70x magnification 40mm eyepiece provides a starting point for locating objects before swapping to higher-power eyepieces to examine them in detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eStarBright XLT Coatings: Maximizing Light Throughput\u003c\/h3\u003e\n\u003cp\u003eTo ensure that the maximum amount of light reaches your eye or camera sensor, the C11 features Celestron's premium StarBright XLT optical coatings. This multi-layer system enhances light transmission across the visual spectrum by using highly reflective mirror coatings and advanced anti-reflection layers on the corrector lens.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMirror Coatings:\u003c\/strong\u003e Precise layers of aluminum, quartz (SiO2), and titanium dioxide (TiO2) create a highly reflective surface optimized for both visual astronomy and imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrector Coatings:\u003c\/strong\u003e Anti-reflection layers of magnesium fluoride (MgF2) and hafnium dioxide (HfO2) minimize light loss as light enters the telescope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater White Glass:\u003c\/strong\u003e The corrector plate is made from high-transmission water white glass, which provides a noticeable improvement in brightness over standard soda-lime glass.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFastar-Ready: Transform to an f\/2 Imaging System\u003c\/h3\u003e\n\u003cp\u003eThe C11 OTA is equipped with Fastar technology, offering a powerful advantage for astrophotographers. By removing the secondary mirror and attaching a compatible third-party lens assembly and camera, you can convert the C11 from its native f\/10 to an incredibly fast f\/2 imaging system. This configuration uses the primary mirror's focal plane directly.\u003c\/p\u003e\n\u003cp\u003eImaging at f\/2 reduces exposure times by a factor of 25 compared to imaging at f\/10. This allows you to capture detailed images of faint nebulae and galaxies with exposures of just a few seconds, dramatically increasing efficiency and reducing the demands on your mount's tracking accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePortable Power: A 27.5 lb, 24\" Optical Tube\u003c\/h3\u003e\n\u003cp\u003eFor an 11\" aperture instrument, the C11 remains remarkably portable. The optical tube weighs just 27.5 lbs (12.4 kg) and is 24\" (610mm) long, allowing for setup and transport by a single person. This portability makes it a practical choice for observers who travel to dark-sky locations for the best views.\u003c\/p\u003e\n\u003cp\u003eThe integrated CGE dovetail bar provides a secure, wide mounting platform compatible with a wide range of medium-to-heavy-duty German equatorial mounts. This ensures a stable connection that is critical for both high-magnification visual work and long-exposure astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eC11 vs. C9.25: The Leap in Light Gathering Power\u003c\/h3\u003e\n\u003cp\u003eWhile the Celestron C9.25 is a celebrated telescope in its own right, the C11 represents a significant step up in optical capability. The primary difference lies in light-gathering ability, which is a direct function of the aperture's area.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eC9.25 Advantage:\u003c\/strong\u003e The smaller C9.25 OTA is lighter (around 20 lbs) and easier to manage on mid-range mounts, making it a more portable and less demanding option.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC11 Advantage:\u003c\/strong\u003e The C11's 11\" mirror provides approximately 39% more light-gathering area than the 9.25\" mirror. This translates directly to brighter images, shorter exposure times, and the ability to resolve fainter deep-sky objects and finer planetary detail. For those with a capable mount, the C11 delivers a noticeably more powerful view.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Celestron C11 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Celestron C11 weighs \u003cstrong\u003e27.5 lbs\u003c\/strong\u003e and comes with a CGE-style dovetail bar. You will need a German equatorial mount with a payload capacity of at least 40 lbs to ensure stability for visual use, and preferably 50 lbs or more for serious astrophotography. Mounts like the Celestron CGEM II, CGX, or similar models from other manufacturers are appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the C11 perform for imaging the Orion Nebula (M42) with the Fastar system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUsing the Fastar system transforms the C11 into an f\/2 astrograph, which is ideal for large, bright targets like the Orion Nebula (M42). You can capture the entire nebula with incredibly short exposures, often just 20-30 seconds per frame, revealing faint outer details and the Trapezium core without overexposing it. This setup is perfect for electronically-assisted astronomy (EAA) or for quickly gathering data for a final stacked image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the C11's StarBright XLT coatings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eStarBright XLT coatings are a high-transmission optical coating system that minimizes light loss as it passes through the telescope. This results in visibly brighter images and higher contrast compared to standard coatings. For visual observers, this means seeing fainter stars and more subtle details on planets. For imagers, it means shorter exposure times are needed to capture the same amount of data.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the C11 resolve the Cassini Division in Saturn's rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. With its \u003cstrong\u003e0.42 arc second\u003c\/strong\u003e Dawes resolution, the C11 is more than capable of clearly resolving the Cassini Division under steady seeing conditions. It can also reveal more subtle details, such as cloud bands on Saturn's surface and other minor ring divisions like the Encke Gap when atmospheric conditions are excellent.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Celestron C11 OTA portable enough for one person to set up?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile substantial, the C11 is designed to be manageable. At \u003cstrong\u003e27.5 lbs\u003c\/strong\u003e and \u003cstrong\u003e24 inches\u003c\/strong\u003e long, most adults can lift and place the optical tube onto its mount without assistance. It represents the upper limit of what is generally considered a \"one-person portable\" large-aperture telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the C11 over a C9.25 optical tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is light grasp. The C11's 11\" mirror has about 39% more surface area than the 9.25\" mirror. This significant increase in light-gathering power allows the C11 to produce brighter images, resolve fainter objects, and achieve higher effective resolution on planets and double stars. While the C9.25 is an excellent performer, the C11 offers a distinct and noticeable improvement in capability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eSchmidt-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e279.4mm (11\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2800mm (110\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.5 arc seconds (Rayleigh), 0.42 arc seconds (Dawes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e1593x (Compared to human eye)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e660x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e40x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e14.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e95mm (3.75\"); 34% by diameter, 12% by area\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e40mm (1.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Magnification\u003c\/td\u003e\n\u003ctd\u003e70x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal\u003c\/td\u003e\n\u003ctd\u003e1.25\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e610mm (24\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e312.42mm (12.4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e27.5 lbs (12.4 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron C11 Optical Tube Assembly\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/c11-a-xlt-cge-91036-xlt_01.jpg?v=1680590632\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCelestron 11\" Schmidt-Cassegrain OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"9x50 Finderscope\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/celestron_9x50_finderscope_1.jpg?v=1680590632\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9x50 Finderscope with Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"40mm Eyepiece\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/omni-eyepiece-40mm-93325_01.jpg?v=1680590632\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e40mm Eyepiece (1.25\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"1.25-inch Star Diagonal\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/94115-a_diagonal_1.jpg?v=1680590632\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Star Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron_Advanced_Series_SCT_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 9\n6 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron SCT Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Telescope Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967157072157,"sku":"CEL-91036-XLT","price":4587.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-C11-Optical-Tube-Assembly-CGE-Dovetail-91036-XLT-1__81410.1594230345.1280.1280.jpg?v=1684337646"},{"product_id":"celestron-c14-ota-cge-dovetail","title":"Celestron C14 OTA  - CGE Dovetail","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e355.5mm (14\") Schmidt-Cassegrain Optical Tube Assembly\u003c\/li\u003e\n\u003cli\u003e3910mm Focal Length at f\/11\u003c\/li\u003e\n\u003cli\u003eDawes Limit Resolution of 0.33 Arc Seconds\u003c\/li\u003e\n\u003cli\u003e2581x Light Gathering Power Compared to the Human Eye\u003c\/li\u003e\n\u003cli\u003eFastar Compatible for f\/2 Wide-Field Imaging\u003c\/li\u003e\n\u003cli\u003eWeighs 46 lbs and includes a CGE Dovetail Bar\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron C14 Optical Tube Assembly (CGE Dovetail)\u003c\/h2\u003e\n\u003cp\u003eThe Celestron C14 Optical Tube Assembly is an observatory-class instrument, delivering world-class views from its massive 355.5mm (14\") aperture and 3910mm focal length. This OTA achieves a theoretical resolution of 0.33 arc seconds (Dawes Limit) and gathers 2581x more light than the human eye, revealing intricate details on planets and resolving faint deep-sky objects down to a limiting stellar magnitude of 15.3. Equipped with a CGE dovetail, this flagship optical tube is ready for installation on a high-capacity equatorial mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e14\" Schmidt-Cassegrain: 0.33 Arc Second Dawes Limit\u003c\/h3\u003e\n\u003cp\u003eThe C14's optical power is defined by its immense 355.5mm primary mirror, which provides the light-gathering ability necessary to resolve fine details that smaller instruments cannot. This aperture allows the C14 to reach a Dawes resolution of 0.33 arc seconds, enabling you to clearly see Cassini's Division in Saturn's rings and resolve detail on the surface of Mars. The long 3910mm focal length is ideal for high-magnification views, and the included 40mm eyepiece provides an initial magnification of 98x for locating and centering objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eStarBright XLT Coatings: Maximizing Contrast and Transmission\u003c\/h3\u003e\n\u003cp\u003eTo ensure maximum light reaches your eye or camera sensor, the C14 features Celestron's premier StarBright XLT optical coatings. This advanced system uses enhanced multi-layer mirror coatings and multi-layer anti-reflective coatings on the corrector lens to dramatically increase light transmission and contrast. The result is visibly brighter images, deeper views into faint nebulae, and shorter exposure times for astrophotography. While all Schmidt-Cassegrains have a central obstruction, the C14's is held to just 10% by area, preserving the high-contrast views the design is known for.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging Versatility: From Native f\/11 to Hyper-Fast f\/2\u003c\/h3\u003e\n\u003cp\u003eThe C14 is a formidable imaging platform with two distinct personalities. At its native f\/11 focal ratio, it excels at high-resolution planetary, lunar, and small galaxy imaging, leveraging its long focal length to achieve large image scales. For deep-sky imagers, the OTA is Fastar compatible, allowing the secondary mirror to be replaced with a third-party lens assembly. This converts the C14 into an incredibly fast f\/2 astrograph, reducing exposure times by a factor of 25 and enabling the capture of vast nebulae in a fraction of the time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eObservatory-Class Build: 46 lb OTA with CGE Dovetail\u003c\/h3\u003e\n\u003cp\u003eEngineered for stability and performance, the C14's aluminum optical tube weighs 46 lbs and measures 787mm (31\") in length. It comes equipped with a heavy-duty CGE-style dovetail bar for secure attachment to observatory-grade mounts. The package includes essential accessories to get you started, including a 9x50 finderscope for easy object location and a 2\" star diagonal with a 1.25\" adapter, providing flexibility for a wide range of eyepieces and accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCelestron C14 vs. C11: The Leap from 11\" to 14\" Aperture\u003c\/h3\u003e\n\u003cp\u003eFor observers deciding between Celestron's large SCTs, the choice often comes down to the C14 and its smaller sibling, the C11. The C11 is a superb instrument that is lighter and can be carried by less massive mounts. However, the C14 represents a significant step up in capability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight Gathering:\u003c\/strong\u003e The jump from an 11-inch to a 14-inch primary mirror provides a substantial increase in light-gathering power. This directly translates to brighter images, the ability to see fainter stars, and resolving more detail in the spiral arms of galaxies and the faint outer regions of nebulae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e The C14's larger aperture gives it a superior resolving power, allowing for higher-magnification views of planets and the ability to split tighter double stars than the C11. For imagers, this means a higher level of achievable detail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Requirements:\u003c\/strong\u003e The C14's 46 lb weight demands a robust mount like a CGX-L or equivalent. The C11 is less demanding, making it a more portable option. The C14 is the choice for a permanent or semi-permanent setup where ultimate performance is the goal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Celestron C14 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Celestron C14 OTA weighs 46 lbs (21 kg). It requires a heavy-duty equatorial mount with a payload capacity of at least 60-70 lbs for visual use, and preferably higher for stable astrophotography. Mounts like the Celestron CGX-L or Paramount ME are appropriate choices.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the C14's Fastar capability work for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe C14 is \u003cstrong\u003eFastar compatible\u003c\/strong\u003e, which means you can remove the secondary mirror and replace it with a separate lens assembly (sold by third parties like Starizona). This allows you to place a camera at the front of the telescope, imaging at the primary mirror's f\/2 focal plane. This ultra-fast system is ideal for capturing wide-field, deep-sky objects with dramatically shorter exposure times compared to the native f\/11 focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I resolve Cassini's Division in Saturn's rings with the C14 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Under steady seeing conditions, the C14's 14\" aperture and 0.33 arc second Dawes resolution are more than sufficient to clearly resolve Cassini's Division, as well as subtle cloud bands on Saturn itself and details on Jupiter's surface like the Great Red Spot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the C14's StarBright XLT coatings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eStarBright XLT coatings are a premium multi-layer optical coating system that increases light transmission across the visual spectrum. This results in brighter, higher-contrast views. For visual observers, this means fainter stars and nebulae become visible. For astrophotographers, it means more light reaches the sensor in less time, allowing for shorter exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the C14 perform on deep-sky objects like the Andromeda Galaxy (M31) from a suburban location?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe C14's massive 2581x light-gathering power is a huge asset in suburban skies. While it cannot eliminate light pollution, it can punch through the skyglow to reveal the bright core of the Andromeda Galaxy (M31) in stunning detail. With the included 40mm eyepiece (at 98x), you can frame the core and its surrounding dust lanes. Using the Fastar f\/2 system with appropriate filters would further enhance the view for imaging, pulling out faint details even from a city.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main difference between this C14 and a Celestron EdgeHD 14\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is the optical design's field flatness. This standard C14 is a traditional Schmidt-Cassegrain, which provides exceptionally sharp views in the center of the field. The EdgeHD version is an aplanatic Schmidt-Cassegrain that includes additional corrective lenses to provide a perfectly flat, coma-free field of view from edge to edge. For visual use the difference can be subtle, but for astrophotography with large-sensor cameras, the EdgeHD design is superior for achieving sharp stars across the entire frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eSchmidt-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e355.5mm (14\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e3910mm (154\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.33 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.39 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e2581x (Compared to human eye)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e15.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e840x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e51x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFastar Compatible\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e114mm (4.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction by Diameter\u003c\/td\u003e\n\u003ctd\u003e32%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction by Area\u003c\/td\u003e\n\u003ctd\u003e10%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e787mm (31\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e400.5mm (15.77\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e46 lbs (21 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e40mm (98x Magnification)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Finderscope\u003c\/td\u003e\n\u003ctd\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Star Diagonal\u003c\/td\u003e\n\u003ctd\u003e2\" with 1.25\" adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eC14 Schmidt-Cassegrain OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCGE Dovetail Bar\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e(Attached)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9x50 Finderscope with Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Mirror Star Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Eyepiece Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e40mm Plössl Eyepiece (1.25\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFront and Rear Dust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron_Advanced_Series_SCT_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-1\n0.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron SCT Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Telescope Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967157170461,"sku":"CEL-91038-XLT","price":9452.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-C14-Optical-Tube-Assembly-CGE-Dovetail-91038-XLT-1__60776.1594230346.1280.1280.jpg?v=1684337652"},{"product_id":"celestron-c6-ota-cg-5-dovetail","title":"Celestron C6 OTA  - CG-5 Dovetail","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e150mm (6\") Schmidt-Cassegrain Optical Tube Assembly\u003c\/li\u003e\n\u003cli\u003e1500mm Focal Length (f\/10)\u003c\/li\u003e\n\u003cli\u003eStarBright XLT Optical Coatings\u003c\/li\u003e\n\u003cli\u003eWeighs Only 10 lbs (4.54 kg)\u003c\/li\u003e\n\u003cli\u003eCG-5 Dovetail Bar for Wide Mount Compatibility\u003c\/li\u003e\n\u003cli\u003eIncludes 6x30 Finderscope and 25mm Eyepiece (60x)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron C6 OTA with CG-5 Dovetail\u003c\/h2\u003e\n\u003cp\u003eThe Celestron C6 Optical Tube Assembly packs a powerful 1500mm focal length and a 150mm aperture into a tube that is only 16\" long and weighs just 10 lbs. Its f\/10 focal ratio provides the magnification needed for high-contrast views of planets and the Moon, resolving detail down to 0.77 arc seconds with a limiting magnitude of 13.4. With 459 times the light gathering power of the human eye, enhanced by StarBright XLT coatings, this OTA delivers bright images of deep-sky objects from a compact and highly portable platform.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e1500mm Focal Length at f\/10: Planetary and Lunar Detail\u003c\/h3\u003e\n\u003cp\u003eThe C6's long 1500mm focal length is its defining feature, making it a premier instrument for detailed solar system observation. This optical power allows the included 25mm eyepiece to deliver 60x magnification right out of the box, with a theoretical maximum useful magnification of 354x for resolving fine features. The f\/10 focal ratio darkens the sky background, which increases the apparent contrast on planetary disks, lunar craters, and tight double stars.\u003c\/p\u003e\n\u003cp\u003eWhile this design excels at high-power viewing, it's not ideal for imaging the largest nebulae, which require a much wider field of view. However, for galaxies, globular clusters, and planetary nebulae, the C6 provides the image scale needed to resolve structure without requiring aggressive Barlow lenses, making it a balanced and capable performer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eStarBright XLT Coatings: 459x Light Gathering Power\u003c\/h3\u003e\n\u003cp\u003eMaximizing the light from its 150mm aperture, the Celestron C6 OTA features proprietary StarBright XLT optical coatings on all surfaces. This advanced multi-layer system uses high-reflectivity mirror coatings and anti-reflection coatings on the corrector lens to increase light transmission. The result is visibly brighter images and higher contrast compared to standard coatings.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrighter Deep-Sky Objects:\u003c\/strong\u003e The enhanced light throughput makes faint objects like the spiral arms of M51 or the core of the Hercules Cluster (M13) appear more distinct against the night sky.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Exposure Times:\u003c\/strong\u003e For imagers, higher transmission means more signal reaches the sensor in a shorter amount of time, improving the signal-to-noise ratio in every sub-exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Transmission Glass:\u003c\/strong\u003e The corrector plate is made from high-transmission water white glass, which avoids the light loss inherent in standard soda-lime glass, further boosting the system's overall brightness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Portable 10 lb, 16\" Optical Tube\u003c\/h3\u003e\n\u003cp\u003eWeighing only 10 lbs and measuring 16\" in length, the C6 is one of the most portable and versatile telescopes an amateur astronomer can own. Its compact size and low weight make it an easy load for a wide variety of mounts, from a simple manual alt-azimuth mount for quick viewing sessions to a robust German equatorial mount for long-exposure astrophotography. The attached CG-5 dovetail bar ensures it can be mounted securely to most popular mount saddles without modification.\u003c\/p\u003e\n\u003cp\u003eThis portability makes the Celestron C6 an excellent travel scope for dark-sky sites or a convenient grab-and-go option for backyard observing. It strikes a balance between aperture and ease of use, providing serious optical power without the setup time and transport challenges of a larger instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is best for the Celestron C6 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Celestron C6 OTA is highly versatile due to its 10 lb weight and CG-5 dovetail. For visual use, a manual alt-azimuth mount is sufficient and offers a simple grab-and-go setup. For astrophotography, a computerized German equatorial mount like Celestron's Advanced VX is recommended to handle the 1500mm focal length and provide accurate tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Celestron C6 good for deep-sky astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe C6 is excellent for smaller deep-sky objects like galaxies (M51, M82) and planetary nebulae (M57, the Ring Nebula) due to its 1500mm focal length. However, its f\/10 focal ratio is \"slow,\" requiring longer exposure times. For wider nebulae like the Orion Nebula (M42), a focal reducer is recommended to shorten the focal ratio and widen the field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will Jupiter look through the Celestron C6 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its 1500mm focal length and 0.77 arc second Dawes' limit resolution, the Celestron C6 will provide detailed views of Jupiter. Using a high-power eyepiece or a Barlow lens, you can expect to clearly resolve the primary cloud bands, the Great Red Spot, and the four Galilean moons transiting the planet's disk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 37% secondary mirror obstruction on the C6 mean for views?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 37% obstruction by diameter (14% by area) is typical for a Schmidt-Cassegrain design. It slightly reduces peak contrast compared to an unobstructed refractor of the same aperture. However, the C6's large aperture and StarBright XLT coatings compensate for this, still delivering bright, sharp images, especially on planets and the Moon.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2\" eyepieces with the Celestron C6?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo use 2\" eyepieces with the Celestron C6, you will need to purchase a separate 2\" visual back that threads onto the rear cell of the telescope, as well as a 2\" star diagonal. The stock configuration only supports 1.25\" accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Celestron C6 a good telescope for a beginner?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the C6 offers advanced-level optical performance, its compact size and ease of handling make it very accessible. As an optical tube assembly (OTA), it requires a separate mount. For a beginner looking for a high-quality system that they won't outgrow quickly, the C6 is an excellent choice when paired with a user-friendly computerized mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eSchmidt-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e150mm (6\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1500mm (59\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e354x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e21x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e13.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.93 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.77 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e459x (Compared to human eye)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e56mm (2.2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction by Diameter\u003c\/td\u003e\n\u003ctd\u003e37%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction by Area\u003c\/td\u003e\n\u003ctd\u003e14%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e406mm (16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e180mm (7.12\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e10 lbs (4.54 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCG-5 Dovetail bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e25mm (60x Magnification)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Finderscope\u003c\/td\u003e\n\u003ctd\u003e6x30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Star Diagonal\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eC6 Schmidt-Cassegrain Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e6x30 Finderscope with Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e25mm Eyepiece (1.25\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Star Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFront and Rear Dust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron_Advanced_Series_SCT_Manual.pdf?v=1782176435\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron SCT Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Telescope Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967157301533,"sku":"CEL-91010-XLT","price":1223.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-C6-Optical-Tube-Assembly-CG-5-Dovetail-91010-XLT-1__39491.1594230348.1280.1280.jpg?v=1684337566"},{"product_id":"celestron-c8-ota-cge-dovetail","title":"Celestron C8 OTA  - CGE Dovetail","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e203.2mm (8\") Schmidt-Cassegrain Optical Tube Assembly\u003c\/li\u003e\n\u003cli\u003e2032mm Focal Length at a f\/10 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eStarBright XLT Optical Coatings for Maximum Transmission\u003c\/li\u003e\n\u003cli\u003eFastar-Compatible for f\/2 Wide-Field Imaging\u003c\/li\u003e\n\u003cli\u003eWeighs only 12.5 lbs and includes a CGE Dovetail Bar\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron C8 Optical Tube Assembly (CGE Dovetail)\u003c\/h2\u003e\n\u003cp\u003eThe Celestron C8 Optical Tube Assembly packages a powerful 203.2mm (8\") aperture and a 2032mm focal length into a tube that is just 17\" long. Its native f\/10 focal ratio resolves details down to 0.57 arc seconds, making it ideal for high-magnification planetary observation, while its light-gathering power of 843x reveals faint deep-sky objects down to a limiting stellar magnitude of 14. Weighing only 12.5 lbs and equipped with a CGE-style dovetail, this OTA remains the benchmark for portable astronomical performance, continuing a legacy that began in 1970.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e8\" Schmidt-Cassegrain Optics: 2032mm Focal Length in a 17\" Tube\u003c\/h3\u003e\n\u003cp\u003eThe C8's Schmidt-Cassegrain design is an icon for a reason: it delivers the long focal length needed for detailed views of planets and double stars in a highly compact form. With a resolution of 0.57 arc seconds (Dawes), you can clearly distinguish the Cassini Division in Saturn's rings or split tight double stars. The 203.2mm aperture provides the light grasp necessary to go beyond the solar system and resolve globular clusters or the faint spiral arms of distant galaxies.\u003c\/p\u003e\n\u003cp\u003eThe trade-off for this compact design is a 31% central obstruction from the secondary mirror, which slightly reduces contrast compared to an unobstructed refractor of the same aperture. However, for its combination of aperture, focal length, and portability, the C8's optical system is unmatched in versatility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eStarBright XLT Coatings: 843x More Light Than the Eye\u003c\/h3\u003e\n\u003cp\u003eMaximizing the light that reaches your eyepiece or camera is critical, and the C8 employs Celestron’s premium StarBright XLT coatings to do so. This isn't a standard coating; it's a complex system using layers of aluminum, quartz, titanium dioxide, and hafnium dioxide on the mirrors and anti-reflective compounds on the corrector lens. The corrector itself is made from high-transmission water white glass, which passes more light than the soda-lime glass used in competing designs.\u003c\/p\u003e\n\u003cp\u003eThe result is visibly higher contrast and brighter images, whether you're observing the faint wisps of the Orion Nebula (M42) or trying to shorten exposure times for deep-sky imaging. Every photon counts, and StarBright XLT ensures that as many as possible make it through the optical train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFastar-Compatible: Convert from f\/10 to Ultra-Fast f\/2\u003c\/h3\u003e\n\u003cp\u003eThe C8 offers a unique versatility for astrophotographers through its Fastar compatibility. By removing the secondary mirror and installing a third-party lens assembly, you can mount a camera at the front of the telescope, transforming the optical system into an incredibly fast f\/2 astrograph. This 25-fold reduction in exposure time allows you to capture detailed images of nebulae and galaxies in seconds, not minutes.\u003c\/p\u003e\n\u003cp\u003eThis dual-purpose capability makes the C8 an exceptional value. You get a long-focal-length f\/10 instrument for planets and small targets, and a wide-field, ultra-fast f\/2 imaging system in the same optical tube, providing flexibility that few other telescopes can match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Portable 12.5 lb OTA with a CGE Dovetail Mount\u003c\/h3\u003e\n\u003cp\u003eAt just 12.5 lbs and 17\" in length, the C8 is remarkably easy to handle, transport, and mount. This portability means you are more likely to take it out to a dark-sky site, and setup is manageable for a single person. Its modest weight places less demand on the mount, allowing for stable performance on a wider range of mid-sized equatorial mounts.\u003c\/p\u003e\n\u003cp\u003eIt comes equipped with a CGE-style dovetail bar, a wider and more rigid standard than the Vixen-style bar. This ensures a secure connection to your mount, minimizing flexure and vibration, which is especially important for long-exposure astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCelestron C8 vs. C9.25: The Classic Aperture Trade-Off\u003c\/h3\u003e\n\u003cp\u003eChoosing between the C8 and its larger sibling, the C9.25, is a common decision for amateur astronomers. The C9.25 offers more aperture, translating to brighter images and slightly higher resolution. However, this comes at the cost of portability and mount requirements.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCelestron C9.25 Advantage:\u003c\/strong\u003e With its 2350mm focal length and larger aperture, the C9.25 pulls in about 33% more light, making it better for resolving faint detail in galaxies and globular clusters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCelestron C8 Advantage:\u003c\/strong\u003e The C8 is significantly lighter (12.5 lbs vs. ~20 lbs for the C9.25), making it easier to transport and compatible with less expensive mounts. It also cools down to ambient temperature faster, allowing you to start observing sooner. For many, the C8 represents the perfect sweet spot between performance and practicality.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Celestron C8 perform on planets like Jupiter from a suburban backyard?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe C8 is an excellent planetary performer, even from light-polluted areas. Its 2032mm focal length and 8-inch aperture provide enough magnification and resolution to clearly see Jupiter's main cloud bands, the Great Red Spot, and its four Galilean moons. Good seeing (atmospheric stability) is more important than dark skies for planetary observing, and the C8 has the optical power to take advantage of steady nights.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I see the spiral arms of the Whirlpool Galaxy (M51) with the C8 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, from a reasonably dark sky site, the C8's 8-inch aperture gathers enough light to resolve the spiral structure of bright galaxies like M51. While it will appear as a faint, ghostly swirl, the direct visual connection between M51 and its companion galaxy NGC 5195 is readily apparent. The StarBright XLT coatings are a significant help here in maximizing contrast against the sky background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the Celestron C8 optical tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a weight of 12.5 lbs, the C8 works well on mid-range computerized equatorial mounts. A mount with a payload capacity of at least 25-30 lbs is recommended, especially for astrophotography, to ensure stability. The C8 comes with a CGE-style dovetail bar, so ensure your mount's saddle is compatible with that wider format (many modern mounts have dual Vixen\/CGE saddles).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the C8 OTA good for a beginner in astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe C8 is a very capable but challenging instrument for beginner imagers due to its long 2032mm focal length. This makes guiding and polar alignment more critical. However, its Fastar capability is a huge advantage. By converting it to an f\/2 system, imaging becomes far more forgiving and allows a beginner to achieve great results with very short exposures, making it an excellent platform to grow with.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main benefit of the C8's StarBright XLT coatings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is higher light transmission. More light passing through the telescope means brighter images, which helps in two ways:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor \u003cstrong\u003evisual observing\u003c\/strong\u003e, faint objects like nebulae and galaxies will appear brighter and with more contrast.\u003c\/li\u003e\n\u003cli\u003eFor \u003cstrong\u003eastrophotography\u003c\/strong\u003e, it allows for shorter exposure times to capture the same amount of detail, reducing the demand on your mount's tracking accuracy.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 31% secondary mirror obstruction on the C8 mean in practice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe secondary mirror obstruction slightly reduces the contrast of fine, low-contrast details compared to an unobstructed telescope like a refractor. While this is a measurable effect, the C8's large 8\" aperture still provides vastly more light-gathering and resolving power than a smaller refractor. For most deep-sky and planetary observing, the practical impact is minimal and is an accepted trade-off for the SCT's compact, portable design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eSchmidt-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e203.2mm (8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2032mm (80\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e843x (Compared to human eye)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e480x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e29x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.69 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.57 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e64mm (2.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Diameter\u003c\/td\u003e\n\u003ctd\u003e31%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Area\u003c\/td\u003e\n\u003ctd\u003e9.77%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e25mm (1.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Magnification\u003c\/td\u003e\n\u003ctd\u003e81x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e6x30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e432mm (17\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e238mm (9.37\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e12.5 lbs (5.67 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eC8 Schmidt-Cassegrain Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e25mm Eyepiece (1.25\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e6x30 Finderscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Star Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFront and Rear Dust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron_Advanced_Series_SCT_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron SCT Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C\n8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Telescope Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967157367069,"sku":"CEL-91024-XLT","price":1946.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-C8-Optical-Tube-Assembly-CGE-Dovetail-91024-XLT-1__90512.1594230350.1280.1280.jpg?v=1684337582"},{"product_id":"celestron-c9-25-ota-cge-dovetail","title":"Celestron C9.25 OTA  - CGE Dovetail","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e235mm (9.25\") Schmidt-Cassegrain Optical Tube\u003c\/li\u003e\n\u003cli\u003e2350mm Focal Length (f\/10)\u003c\/li\u003e\n\u003cli\u003eStarBright XLT Optical Coatings\u003c\/li\u003e\n\u003cli\u003eFastar-Compatible for f\/2 Imaging\u003c\/li\u003e\n\u003cli\u003e20 lb Optical Tube Weight\u003c\/li\u003e\n\u003cli\u003eCGE-Style Dovetail Bar\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron C9.25 Optical Tube Assembly (CGE Dovetail)\u003c\/h2\u003e\n\u003cp\u003eThe Celestron C9.25 Optical Tube Assembly delivers the perfect balance of aperture and portability with its 235mm (9.25\") primary mirror and 2350mm focal length. This f\/10 system achieves a Dawes resolution of 0.49 arc seconds and gathers 1127x more light than the human eye, revealing intricate detail on planets and faint deep-sky objects. Weighing just 20 lbs and measuring 22\" in length, the C9.25 provides a significant astronomical advantage in a manageable package.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 9.25\" Aperture Advantage: 0.49 Arc Second Resolution\u003c\/h3\u003e\n\u003cp\u003eThe C9.25's unique 235mm aperture is a significant step up from 8-inch designs, translating directly to higher resolution and brighter images. With a theoretical Dawes limit of 0.49 arc seconds, you can resolve tighter double stars and finer detail in planetary cloud bands. This optical power allows you to push magnification up to 555x on steady nights and reach a limiting stellar magnitude of 14.4, pulling in faint galaxies and globular cluster cores that smaller apertures struggle with.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eStarBright XLT Coatings for 1127x Light Gathering\u003c\/h3\u003e\n\u003cp\u003eEvery glass surface in the C9.25 is treated with Celestron's premium StarBright XLT coatings, a sophisticated system of multi-layer mirror and anti-reflective coatings that maximize light transmission. These coatings ensure that the maximum number of photons from your target reach the eyepiece, boosting the OTA's 1127x light-gathering power. The result is visibly higher contrast that makes planetary features pop and reveals faint, extended nebulosity against a dark sky background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFastar-Ready: Transform to an f\/2 Imaging Platform\u003c\/h3\u003e\n\u003cp\u003eFor the astrophotographer, the C9.25 offers a critical advantage: it is Fastar-compatible. By replacing the secondary mirror with a third-party lens assembly, you can place a camera at the front of the telescope, transforming it into an incredibly fast f\/2 imaging system. This configuration reduces exposure times by a factor of 25 compared to imaging at the native f\/10, allowing you to capture high-quality images of large nebulae and galaxies in just seconds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Portable 20 lb OTA with CGE Dovetail Mounting\u003c\/h3\u003e\n\u003cp\u003eDespite its impressive aperture, the Celestron C9.25 remains highly portable. The aluminum optical tube weighs only 20 lbs and is just 22\" long, making it easy for a single person to lift and mount. It comes equipped with a CGE-style dovetail bar, the larger and more rigid standard, ensuring a secure connection to a wide range of medium-to-heavy-duty German equatorial mounts capable of supporting its weight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eC9.25 vs. C8: The \"Goldilocks\" Schmidt-Cassegrain\u003c\/h3\u003e\n\u003cp\u003eFor astronomers deciding between Celestron's iconic SCTs, the C9.25 often represents the ideal middle ground. While the 8\" SCT is lighter, the C9.25 provides a substantial performance upgrade without the demanding weight and mounting requirements of an 11\" model.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCelestron C8 Advantage:\u003c\/strong\u003e At just 12.5 lbs, the C8 is the ultimate in portability and can be carried by lighter, less expensive mounts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCelestron C9.25 Advantage:\u003c\/strong\u003e The C9.25's larger 235mm aperture collects 33% more light than an 8\" (203mm) mirror. This translates to significantly brighter images of faint objects and higher resolving power, making it a more capable instrument for both visual observation and astrophotography.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Celestron C9.25 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe C9.25 weighs 20 lbs and comes with a CGE-style (3-inch) dovetail bar. You will need a German equatorial mount with a CGE or dual Losmandy\/CGE saddle plate and a payload capacity of at least 30 lbs for visual use, or 40 lbs for stable astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the C9.25's 36% central obstruction affect views?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 36% obstruction by diameter is typical for a Schmidt-Cassegrain design and results in a slight reduction in peak contrast compared to an unobstructed refractor of the same aperture. However, the C9.25's large aperture and StarBright XLT coatings still deliver exceptionally bright, high-resolution images that far surpass what a smaller refractor can show, especially on deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat accessories do I need to use the C9.25's Fastar capability?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo image at f\/2, you will need a Fastar lens assembly (sold by third-party manufacturers like Starizona or Celestron) and a compatible astronomy camera with a small, round body that fits in the front of the telescope without blocking too much of the aperture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the C9.25 clearly resolve the Cassini Division in Saturn's rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The C9.25's 0.49 arc second Dawes resolution is more than sufficient to cleanly resolve the Cassini Division on any night with average seeing conditions. On a night of steady seeing, you can expect to see cloud bands on both Saturn and Jupiter, and potentially even the Great Red Spot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the C9.25 a good choice for imaging small galaxies like the Whirlpool Galaxy (M51)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the C9.25 is an excellent instrument for galaxy imaging. Its long focal length of 2350mm provides the ideal image scale to capture detail in smaller targets like the Whirlpool Galaxy (M51) or the Sombrero Galaxy (M104) without requiring aggressive Barlow lenses or power-mates.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the C9.25 often called the \"Goldilocks\" telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe C9.25 earns this title because it offers a near-perfect compromise between performance and portability. It provides a 33% increase in light-gathering power over an 8\" SCT, making a visible difference at the eyepiece, while still weighing only 20 lbs—making it far more manageable than a much heavier 11\" SCT.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eSchmidt-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e235mm (9.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2350mm (93\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e555x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e34x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e14.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.59 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.49 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e1127x (Compared to human eye)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e85mm (3.35\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Diameter\u003c\/td\u003e\n\u003ctd\u003e36%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Area\u003c\/td\u003e\n\u003ctd\u003e13%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e559mm (22\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e20 lbs (9.07 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e25mm (94x Magnification)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e6x30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9.25\" Schmidt-Cassegrain OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e25mm Eyepiece (1.25\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e6x30 Finderscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Star Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFront and Rear Dust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron_Advanced_Series_SCT_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron SCT Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Telescope Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967157432605,"sku":"CEL-91027-XLT","price":2780.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-C9-25-Optical-Tube-Assembly-CGE-Dovetail-91027-XLT-1__27091.1594230352.1280.1280.jpg?v=1684337588"},{"product_id":"celestron-edgehd-11-ota-cge-dovetail","title":"Celestron EdgeHD 11\" OTA  - CGE Dovetail","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e279.4mm (11\") EdgeHD Aplanatic Optics\u003c\/li\u003e\n\u003cli\u003e2800mm Focal Length (f\/10)\u003c\/li\u003e\n\u003cli\u003e42mm Image Circle for Full-Frame Sensors\u003c\/li\u003e\n\u003cli\u003eStarBright XLT Optical Coatings\u003c\/li\u003e\n\u003cli\u003e28 lb Optical Tube Weight\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron EdgeHD 11\" Optical Tube Assembly (CGE Dovetail)\u003c\/h2\u003e\n\u003cp\u003eThe Celestron EdgeHD 11\" Optical Tube Assembly combines a massive 279.4mm aperture with a 2800mm focal length for unparalleled deep-sky and planetary imaging. Its aplanatic, flat-field optics achieve a theoretical resolution of 0.42 arc seconds, while its light-gathering power is 1593 times that of the human eye. The entire 28 lb optical tube is engineered specifically for astrophotography, delivering aberration-free images across a wide field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEdgeHD Optics: A 0.42 Arc Second Flat-Field System\u003c\/h3\u003e\n\u003cp\u003eThe core of the EdgeHD 11\" is its aplanatic, flat-field Schmidt-Cassegrain optical system, designed to produce aberration-free images from the center to the edge of the field. Unlike standard Schmidt-Cassegrains that produce sharp stars on a curved focal plane, the EdgeHD optics project onto a plane more than three times flatter. This design ensures that when you use a camera with a flat digital sensor, stars remain tight, round, and in focus across the entire 42mm image circle, fully illuminating even large full-frame chips.\u003c\/p\u003e\n\u003cp\u003eWith a Dawes' limit resolution of 0.42 arc seconds, this optical tube has the resolving power to split tight double stars and reveal fine detail in planetary cloud bands. Superior edge performance not only creates more pleasing star fields but improves the effective resolution and limiting magnitude compared to other designs of the same aperture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eUnmatched Versatility: Native f\/10 and Ultra-Fast f\/2 Imaging\u003c\/h3\u003e\n\u003cp\u003eThe EdgeHD 11\" is Celestron's most adaptable imaging platform. At its native 2800mm focal length (f\/10), you have the image scale needed to capture fine details in small planetary nebulae and distant galaxies. For wider-field targets, an optional, custom-designed 0.7x reducer lens can increase your field of view without compromising the flat-field optical correction.\u003c\/p\u003e\n\u003cp\u003eFor the ultimate in wide-field imaging, all EdgeHD tubes are Fastar-compatible. By replacing the secondary mirror with a third-party lens accessory like the Starizona HyperStar, you can convert the instrument into an ultra-fast f\/2 imaging system. This allows you to capture vast nebulae like the North American Nebula (NGC 7000) or the Heart Nebula (IC 1805) with dramatically shorter exposure times.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAstrograph-Ready Mechanics: Mirror Clutches and Vents for 28 lbs of Stability\u003c\/h3\u003e\n\u003cp\u003eCelestron redesigned the mechanical systems of the EdgeHD to meet the demands of long-exposure imaging. The 28 lb aluminum tube is equipped with features to ensure stability and optical performance throughout an imaging session.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Tension Clutches:\u003c\/strong\u003e To combat \"mirror flop\" or image shift during long exposures, flexible clutches hold the primary mirror in place after focusing. This keeps your target perfectly centered on the sensor without putting any performance-harming force on the mirror assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Cooling Vents:\u003c\/strong\u003e The rear cell features vents with 50-mesh filters that allow hot air to escape from behind the primary mirror. This helps the telescope reach thermal equilibrium with the ambient air faster, improving image stability and reducing tube currents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCGE Dovetail Bar:\u003c\/strong\u003e The included wide CGE-style dovetail provides a secure, rigid connection to any compatible equatorial mount, which is essential for supporting the 28 lb payload without flexure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e1593x Light Gathering Power with StarBright XLT Coatings\u003c\/h3\u003e\n\u003cp\u003eThe 279.4mm (11\") primary mirror gives this telescope an immense light-gathering capability—1593 times that of the unaided human eye. This aperture allows you to resolve stars down to a limiting magnitude of 14.7, revealing faint galaxies, globular clusters like the Hercules Cluster (M13), and delicate nebular structures that are invisible in smaller instruments.\u003c\/p\u003e\n\u003cp\u003eTo maximize the light that reaches your eyepiece or camera sensor, every optical surface is treated with Celestron’s premium StarBright XLT coatings. This multi-layer coating system dramatically increases transmission across the visual and photographic spectrum, resulting in brighter images and higher contrast, especially on faint deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEdgeHD 11\" vs. Standard C11: Why a Flat Field Matters for Imaging\u003c\/h3\u003e\n\u003cp\u003eWhile a standard Celestron 11\" SCT is a legendary visual instrument and highly capable for planetary imaging, it projects its sharpest focus onto a curved plane. The EdgeHD 11\" was designed specifically to solve this for astrophotography.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard C11 Advantage:\u003c\/strong\u003e For a purely visual observer, the standard C11 offers nearly identical views at a lower price point. The human eye is very forgiving of field curvature.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdgeHD 11\" Advantage:\u003c\/strong\u003e For an astrophotographer using a DSLR, mirrorless, or dedicated astronomy camera, the flat field is critical. On a standard SCT, stars at the edge of the frame will appear elongated or out of focus. The EdgeHD's aplanatic design corrects for this, ensuring pinpoint stars across the entire sensor and eliminating the need for a separate field flattener.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main difference between the EdgeHD 11\" and a standard Celestron C11 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is the optical design. The EdgeHD 11\" has a flat-field, aplanatic system that corrects for coma and field curvature, producing pinpoint stars across a 42mm image circle. A standard C11 has a curved focal plane, which is excellent for visual use but can result in out-of-focus stars at the edge of a camera sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Celestron EdgeHD 11\" for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While optimized for imaging, the EdgeHD 11\" is a superb visual instrument. The flat field provides incredibly sharp, wide-field views, and the 11-inch aperture delivers stunning detail on the Moon, planets, and deep-sky objects. It comes with a 2\" star diagonal and a 23mm eyepiece to get you started.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the EdgeHD 11\" perform on small galaxies like the Whirlpool Galaxy (M51) versus large targets like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis telescope's versatility shines with these exact targets. At its native f\/10 (2800mm focal length), it's perfect for framing smaller galaxies like M51 and capturing detail in its spiral arms. For a vast target like M31, you would use the Fastar f\/2 configuration with a HyperStar lens, allowing you to capture the entire galaxy in a single, wide-field frame with much shorter exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the 28 lb EdgeHD 11\" OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor astrophotography, the 28 lb weight of the OTA, plus the weight of your camera, guide scope, and other accessories, requires a robust equatorial mount. A mount with a payload capacity of at least 50 lbs, such as a Celestron CGX or a similar class mount, is recommended to ensure stability and accurate tracking for long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a full-frame DSLR camera. Will the EdgeHD 11\" fully illuminate its sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The EdgeHD 11\" is designed with a 42mm optimized image circle, which is large enough to fully illuminate a standard 35mm full-frame sensor (which has a ~43mm diagonal) with minimal vignetting. This makes it an ideal choice for serious imagers using large-format cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do the mirror clutches on the EdgeHD 11\" help with astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe mirror clutches are essential for preventing \"image shift\" or \"mirror flop.\" During a long exposure, as the telescope tracks across the sky, a loose primary mirror can slightly tilt, causing trailed or blurry stars. Once you achieve focus, you engage the clutches to lock the mirror in place, ensuring your image remains sharp and your guide star stays put.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eEdgeHD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e279.4mm (11\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2800mm (110\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e42mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.5 arc seconds (Rayleigh) \/ 0.42 arc seconds (Dawes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e14.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e1593x (Compared to human eye)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e660x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e40x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e95mm (3.75\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Diameter\u003c\/td\u003e\n\u003ctd\u003e34%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Area\u003c\/td\u003e\n\u003ctd\u003e12%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFastar Compatible\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e610mm (24\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e312.42mm (12.3\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e28 lbs (13 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Finderscope\u003c\/td\u003e\n\u003ctd\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Star Diagonal\u003c\/td\u003e\n\u003ctd\u003e2\" with 1.25\" adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e23mm (122x)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron EdgeHD 11\" optical tube assembly src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/celestron-edgehd-11-optical-tube-assembly-cge-dovetail-91040-0-1.jpg?v=1792615598\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eEdgeHD 11\" Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron 9x50 Finderscope\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/celestron-9x50-finderscope-w-bracket-51611-1.jpg?v=1792615456\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9x50 Finderscope and Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron 2\" star diagonal src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/celestron-2-star-diagonal-with-1-25-adapter-93527-1.jpg?v=1792615450\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Star Diagonal with 1.25\" Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron 23mm Luminos Eyepiece\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/celestron-luminos-23mm-eyepiece-2-93435-1.jpg?v=1792615448\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e23mm Eyepiece (2\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron CGE Dovetail Bar\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/celestron-dovetail-bar-cge-14-94218-1.jpg?v=1792615452\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCGE Dovetail Bar\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron_EdgeHD_Optics_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l\n0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron EdgeHD Optics Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron-EdgeHD-Optics-Whitepaper.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron EdgeHD Optics Whitepaper\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967163756829,"sku":"CEL-91050-XLT","price":5520.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-EdgeHD-11-inch-Optical-Tube-Assembly-CGE-Dovetail-91050-XLT-1__54629.1594230382.1280.1280.jpg?v=1684337852"},{"product_id":"celestron-edgehd-14-ota-cge-dovetail","title":"Celestron EdgeHD 14\" OTA  - CGE Dovetail","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e14\" (356mm) EdgeHD Aplanatic Schmidt-Cassegrain Optics\u003c\/li\u003e\n\u003cli\u003e3910mm Focal Length at f\/11\u003c\/li\u003e\n\u003cli\u003e42mm Optimized Image Circle for Full-Frame Sensors\u003c\/li\u003e\n\u003cli\u003eStarBright XLT Optical Coatings\u003c\/li\u003e\n\u003cli\u003eFastar-Compatible for f\/2 Wide-Field Imaging\u003c\/li\u003e\n\u003cli\u003e46 lb (21 kg) Optical Tube Weight\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron EdgeHD 14\" Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Celestron EdgeHD 14\" Optical Tube Assembly combines a massive 356mm aperture with an aplanatic, flat-field optical design, delivering aberration-free images from its 3910mm focal length. This astrograph-quality system achieves a theoretical resolution of 0.33 arc seconds (Dawes) and gathers 2579 times more light than the human eye, ensuring pinpoint stars across a 42mm image circle. The 46 lb optical tube is equipped with a CGE dovetail bar for secure mounting on high-capacity equatorial mounts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 0.33\" Flat-Field Aplanatic Schmidt-Cassegrain\u003c\/h3\u003e\n\u003cp\u003eThe EdgeHD optical system is engineered to deliver a focal plane more than three times flatter than a standard Schmidt-Cassegrain, correcting for both coma and field curvature. This guarantees that stars remain sharp and in focus to the very edge of a large, full-frame camera sensor. With a Dawes resolution limit of 0.33 arc seconds, the EdgeHD 14\" is capable of resolving fine detail on planetary surfaces and splitting tight double stars under steady skies.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAplanatic Schmidt-Cassegrain:\u003c\/strong\u003e Produces aberration-free images, eliminating the off-axis star coma that distorts stars into comet-like shapes at the edge of the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42mm Image Circle:\u003c\/strong\u003e Fully illuminates full-frame sensors, providing a wide, unvignetted field of view for capturing large deep-sky objects and mosaics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividually Tested:\u003c\/strong\u003e Every EdgeHD OTA is factory-tested with a camera and an artificial star to confirm its optical system meets Celestron's stringent quality standards for astro-imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging Engineering: Mirror Clutches, Vents, and a 46 lb OTA\u003c\/h3\u003e\n\u003cp\u003eBeyond the optics, the EdgeHD 14\" tube is mechanically optimized for long-exposure astrophotography. Flexible tension clutches hold the primary mirror in place after focusing, dramatically reducing the image shift that can ruin an exposure. The total optical tube assembly weighs 46 lbs (21 kg) and attaches via a CGE-style dovetail bar, requiring a robust equatorial mount for stable imaging.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMirror Clutches:\u003c\/strong\u003e Once focus is achieved, flexible rods secure the mirror without applying force, keeping your target perfectly centered on the sensor throughout an imaging session.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Vents:\u003c\/strong\u003e Rear cell cooling vents allow hot air to escape from behind the primary mirror, helping the telescope reach thermal equilibrium faster for sharper, more stable views. Each vent is covered by a 50-mesh filter to prevent dust from entering the optical tube.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFrom Native f\/11 to f\/2 Wide-Field Imaging\u003c\/h3\u003e\n\u003cp\u003eThe EdgeHD 14\" is a uniquely versatile imaging platform. At its native f\/11 focal ratio, it provides the image scale needed to capture fine details in distant galaxies and resolve planetary nebulae. For wider perspectives, an optional, custom-designed 0.7x reducer lens can expand the field of view without compromising the flat-field correction. The system's greatest versatility comes from its Fastar compatibility, allowing for ultra-fast, wide-field imaging.\u003c\/p\u003e\n\u003cp\u003eBy replacing the secondary mirror with an optional Starizona HyperStar lens accessory, you can convert the telescope into an f\/2 imaging system. This 20-fold reduction in exposure time transforms the EdgeHD 14\" into a powerful tool for capturing vast, faint nebulae like the North American Nebula (NGC 7000) in a fraction of the time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e356mm Aperture with StarBright XLT Coatings\u003c\/h3\u003e\n\u003cp\u003eThe foundation of this telescope's power is its 356mm (14\") primary mirror, which provides a light-gathering power 2579 times that of the unaided eye. This immense aperture allows the EdgeHD 14\" to reach a limiting stellar magnitude of 15.3, revealing faint galaxies, globular clusters, and details within nebulae that smaller instruments cannot. Every optical surface features Celestron's premium StarBright XLT coatings, which maximize light transmission across the visual and photographic spectrum for brighter images and higher contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEdgeHD 14\" vs. Standard C14: The Flat-Field Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile a standard Celestron 14\" SCT offers the same impressive light-gathering power at a lower price point, it is primarily a visual instrument. Its naturally curved focal plane means that while the center of the view may be sharp, stars at the edge of a camera sensor will appear out of focus. This requires additional field flatteners that can introduce their own optical compromises.\u003c\/p\u003e\n\u003cp\u003eThe EdgeHD 14\" is an astrograph by design. Its integrated flat-field optics ensure that the entire 42mm image circle is sharp, making it the superior choice for any imager using a DSLR, mirrorless, or dedicated astronomy camera with an APS-C or full-frame sensor. For astrophotography, the EdgeHD design provides a significant advantage in image quality, saving you the complexity and cost of correcting a standard SCT's field curvature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the EdgeHD 14\" improve images over a standard 14\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe key difference is the \u003cstrong\u003eflat field\u003c\/strong\u003e. A standard SCT has a curved focal plane, causing stars at the edge of a camera sensor to appear out of focus. The EdgeHD 14\" corrects for this field curvature and off-axis coma, delivering pinpoint-sharp stars across the entire image, which is critical for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 42mm image circle of the EdgeHD 14\" mean for my camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA 42mm image circle is large enough to fully illuminate a \u003cstrong\u003efull-frame sensor\u003c\/strong\u003e (typically 36x24mm) without vignetting or loss of light at the corners. This allows you to use cameras with large sensors to capture the widest possible field of view for objects like the Andromeda Galaxy (M31) or the Orion Nebula (M42).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the mirror clutches on the EdgeHD 14\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe mirror clutches lock the primary mirror in place after you achieve focus. This prevents \"mirror flop\" or \"image shift,\" which is a common issue in SCTs where the mirror can slightly tilt during long exposures as the telescope tracks across the sky. This feature is essential for maintaining sharp, round stars during astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Fastar compatibility work on the EdgeHD 14\" OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFastar compatibility allows you to remove the secondary mirror and replace it with a third-party lens accessory, like the Starizona HyperStar. This converts the telescope from its native f\/11 to an incredibly fast f\/2 optical system. This dramatically widens the field of view and reduces exposure times by a factor of over 20, making it ideal for imaging large, faint nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the 46 lb EdgeHD 14\" OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an optical tube weight of 46 lbs (21 kg), you will need a heavy-duty equatorial mount. For visual use, a mount with a rated capacity of at least 60-70 lbs is recommended. For serious astrophotography, you should choose a mount with a capacity closer to 90-100 lbs to ensure stability and precise tracking with the additional weight of a camera, guide scope, and other accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the EdgeHD 14\" for high-magnification views of planets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. With a long focal length of 3910mm, the EdgeHD 14\" is an exceptional planetary instrument. At its native f\/11, and with the included 23mm eyepiece providing 170x magnification, you can easily see Jupiter's cloud bands and the Cassini Division in Saturn's rings. Adding a Barlow lens can push the magnification towards the highest useful limit of 840x for incredibly detailed views on nights of excellent seeing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eEdgeHD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e356mm (14\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e3910mm (154\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e42mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e840x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e51x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e15.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.39 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.33 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (vs. Human Eye)\u003c\/td\u003e\n\u003ctd\u003e2579x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e114mm (4.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Diameter\u003c\/td\u003e\n\u003ctd\u003e32%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Area\u003c\/td\u003e\n\u003ctd\u003e10%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e23mm (170x Magnification)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal\u003c\/td\u003e\n\u003ctd\u003e2\" with 1.25\" adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e787mm (31\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e400.5mm (15.77\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e46 lbs (21 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron EdgeHD 14 OTA\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/celestron-edgehd-14-optical-tube-assembly-cge-dovetail-91060-x_1_1200x.jpg?v=1682136006\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eEdgeHD 14\" Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron 9x50 Finderscope\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/celestron-9x50-finderscope.jpg?v=1782294975\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9x50 Finderscope and Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron 2-inch Star Diagonal\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/celestron-2-inch-star-diagonal.jpg?v=1782294975\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Star Diagonal w\/ 1.25\" Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron 23mm Luminos Eyepiece\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/celestron-23mm-eyepiece.jpg?v=1782294975\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e23mm Eyepiece (2\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Front and Rear Dust Caps\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/celestron-dust-caps.jpg?v=1782294975\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFront and Rear Dust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron_EdgeHD_Optics_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron EdgeHD Optics Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron-EdgeHD-Optics-Whitepaper.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16\n 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron EdgeHD Optics Whitepaper\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967163789597,"sku":"CEL-91060-XLT","price":9520.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-EdgeHD-14-inch-Optical-Tube-Assembly-CGE-Dovetail-91060-XLT-1__19760.1594230383.1280.1280.jpg?v=1684337857"},{"product_id":"celestron-edgehd-8-ota-cge-dovetail","title":"Celestron EdgeHD 8\" OTA  - CGE Dovetail","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e203.2mm (8\") EdgeHD Aplanatic Optics\u003c\/li\u003e\n\u003cli\u003e2032mm Focal Length at f\/10\u003c\/li\u003e\n\u003cli\u003e42mm Optimized Image Circle\u003c\/li\u003e\n\u003cli\u003eStarBright XLT Optical Coatings\u003c\/li\u003e\n\u003cli\u003eFastar\/HyperStar Compatible for f\/2 Imaging\u003c\/li\u003e\n\u003cli\u003eWeighs only 14 lbs (6.35 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron EdgeHD 8\" Optical Tube Assembly (CGE Dovetail)\u003c\/h2\u003e\n\u003cp\u003eThe Celestron EdgeHD 8\" Optical Tube Assembly integrates a 203.2mm (8\") aperture and a 2032mm focal length into an aplanatic, flat-field system designed for the modern astroimager. Its native f\/10 focal ratio and 0.57 arc second Dawes resolution capture fine planetary and deep-sky detail, while the StarBright XLT coatings and 843x light gathering power ensure exceptionally bright images of faint targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEdgeHD Optics: A 42mm Flat-Field Circle for Pinpoint Stars\u003c\/h3\u003e\n\u003cp\u003eThe core of the EdgeHD 8\" is an optical system that delivers aberration-free stars across its entire 42mm image circle, fully illuminating sensors as large as 35mm. Unlike standard Schmidt-Cassegrain designs that produce sharp stars only on a curved focal plane, the EdgeHD's focal plane is more than three times flatter, ensuring the entire frame is in sharp focus when using a digital camera's flat sensor.\u003c\/p\u003e\n\u003cp\u003eThis astrograph-quality performance means stars at the edge of your image are just as sharp and round as those in the center. This superior edge correction not only improves aesthetics but also enhances effective resolution and limiting magnitude compared to other 203.2mm telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 3-in-1 Astrograph: f\/10, f\/7, and Ultra-Fast f\/2 Imaging\u003c\/h3\u003e\n\u003cp\u003eThe EdgeHD 8\" is engineered for unmatched imaging versatility. Three distinct focal ratios are available in one optical tube, allowing you to perfectly match your image scale to any celestial target without compromising optical quality.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNative f\/10:\u003c\/strong\u003e At its native 2032mm focal length, the OTA provides the magnification needed to resolve small galaxies, planetary nebulae, and details on the Moon and planets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced f\/7:\u003c\/strong\u003e With an optional, custom-designed 0.7x reducer, you can widen your field of view for imaging larger nebulae and star clusters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Fast f\/2:\u003c\/strong\u003e By replacing the secondary mirror with an optional Starizona HyperStar lens, the system transforms into an incredibly fast f\/2 wide-field astrograph, enabling you to capture vast targets like the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000) in a fraction of the time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging Stability: Mirror Clutches and Vents for a 14 lb OTA\u003c\/h3\u003e\n\u003cp\u003eCelestron redesigned the mechanical systems of the 14 lb EdgeHD 8\" tube to support long-exposure imaging. Flexible tension clutches secure the primary mirror after focusing, dramatically reducing the image shift that can ruin sub-exposures. These clutches hold the mirror firmly without applying force that could alter collimation.\u003c\/p\u003e\n\u003cp\u003eTo ensure thermal stability, two cooling vents are integrated into the rear cell behind the primary mirror. Each vent features a 50-mesh filter that allows hot air to escape without letting dust in, enabling the telescope to reach ambient temperature faster for sharper, steadier views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e843x Light Gathering: StarBright XLT Coatings on a 203.2mm Aperture\u003c\/h3\u003e\n\u003cp\u003eWith a light gathering power 843 times that of the human eye, the EdgeHD 8\" reaches a limiting stellar magnitude of 14, revealing faint globular clusters and distant galaxies. Every optical surface is treated with Celestron's premium StarBright XLT coatings, which maximize light transmission across a broad spectrum for brighter images and higher contrast.\u003c\/p\u003e\n\u003cp\u003eThis combination of aperture and high-transmission coatings allows the optics to achieve their theoretical resolution limits of 0.69 arc seconds (Rayleigh) and 0.57 arc seconds (Dawes), ensuring you get the most detail possible from its 203.2mm objective.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEdgeHD 8\" vs. Standard 8\" SCT: A Dramatically Flatter Focal Plane\u003c\/h3\u003e\n\u003cp\u003eWhile a standard 8\" Schmidt-Cassegrain is a capable visual instrument, its naturally curved focal plane and off-axis coma present challenges for astrophotography. Stars away from the center of the field can appear out-of-focus and elongated, especially on larger camera sensors. The EdgeHD 8\" is specifically designed to solve this problem.\u003c\/p\u003e\n\u003cp\u003eIts aplanatic, flat-field optics correct for both coma and field curvature, producing a focal plane that is demonstrably flatter than standard SCTs. This correction is the critical difference, guaranteeing that when you use a modern DSLR or dedicated astronomy camera, your images will have round, pinpoint stars from corner to corner.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the Celestron EdgeHD 8\" over a standard 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is its \u003cstrong\u003eflat-field, coma-free optical design\u003c\/strong\u003e. While a standard SCT is excellent for visual use, its curved focal plane can result in out-of-focus stars at the edge of an imaging sensor. The EdgeHD 8\" produces pinpoint stars across a 42mm image circle, making it vastly superior for astrophotography with DSLR or dedicated astronomy cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the EdgeHD 8\" for planetary imaging of Jupiter and Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The EdgeHD 8\" is an excellent choice for planetary imaging. Its long native focal length of \u003cstrong\u003e2032mm (f\/10)\u003c\/strong\u003e provides the high magnification needed to resolve cloud bands on Jupiter, the Cassini Division in Saturn's rings, and polar caps on Mars. Combining it with a 2x or 3x Barlow lens will further increase the image scale for detailed captures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I convert the EdgeHD 8\" to an f\/2 imaging system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAll EdgeHD optical tubes are \u003cstrong\u003eFastar-compatible\u003c\/strong\u003e. To convert it to an ultra-fast f\/2 system, you carefully unthread and remove the secondary mirror assembly from the front of the telescope and replace it with an optional third-party lens system, such as the Starizona HyperStar. This allows you to mount a camera at the front of the tube for extremely wide-field, short-exposure imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat size camera sensor is the EdgeHD 8\" designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe EdgeHD 8\" is designed to produce a flat, corrected image circle of \u003cstrong\u003e42mm in diameter\u003c\/strong\u003e. This is large enough to fully illuminate full-frame (35mm) DSLR sensors and many large-format CCD\/CMOS astronomy cameras without significant vignetting or distortion at the edges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 14 lb weight of the EdgeHD 8\" manageable for portable mounts?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, at only \u003cstrong\u003e14 lbs (6.35 kg)\u003c\/strong\u003e, the EdgeHD 8\" OTA is very manageable and pairs well with a wide range of equatorial mounts, including portable options like the Celestron Advanced VX. Its relatively low weight makes it a great option for those who need to transport their gear to dark-sky sites.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the EdgeHD 8\" perform for visual observation of the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor visual observation, it's superb. Using the included \u003cstrong\u003e40mm eyepiece (51x magnification)\u003c\/strong\u003e, you can frame the entire Orion Nebula (M42) and easily resolve the four main stars of the Trapezium cluster at its heart. The StarBright XLT coatings provide high-contrast views, revealing faint outer loops of nebulosity from a dark site.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eOptical Tube Specifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eEdgeHD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e203.2mm (8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2032mm (80\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e42mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal\u003c\/td\u003e\n\u003ctd\u003e1.25\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e40mm (51x Magnification)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePerformance\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e480x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e29x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.69 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.57 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e843x (Compared to human eye)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e64mm (2.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Diameter\u003c\/td\u003e\n\u003ctd\u003e31%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Area\u003c\/td\u003e\n\u003ctd\u003e9.77%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePhysical Specifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e432mm (17\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e238mm (9.37\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e14 lbs (6.35 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eSolar Warning\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eNever look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result. Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it. Never leave your optic unsupervised.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eEdgeHD 8\" Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9x50 Finderscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Star Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e40mm Eyepiece (1.25\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCGE Dovetail Bar\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFront and Rear Dust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron_EdgeHD_Optics_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-1\n6 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload EdgeHD Optics Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron-EdgeHD-Optics-Whitepaper.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload EdgeHD Optics Whitepaper\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967163822365,"sku":"CEL-91030-XLT","price":2070.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-EdgeHD-8-inch-Optical-Tube-Assembly-CGE-Dovetail-91030-XLT-1__74732.1594230384.1280.1280.jpg?v=1684337859"},{"product_id":"celestron-edgehd-9-25-ota-cge-dovetail","title":"Celestron EdgeHD 9.25\" OTA  - CGE Dovetail","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e234.95mm (9.25\") EdgeHD Aplanatic Optics\u003c\/li\u003e\n\u003cli\u003e2350mm Focal Length at f\/10\u003c\/li\u003e\n\u003cli\u003eAstrograph-quality 42mm Corrected Image Circle\u003c\/li\u003e\n\u003cli\u003eStarBright XLT Optical Coatings\u003c\/li\u003e\n\u003cli\u003eMirror Support Clutches and Cooling Vents\u003c\/li\u003e\n\u003cli\u003eFastar Compatible for f\/2 Imaging\u003c\/li\u003e\n\u003cli\u003eWeighs 21 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron EdgeHD 9.25\" Optical Tube Assembly (CGE Dovetail)\u003c\/h2\u003e\n\u003cp\u003eThe Celestron EdgeHD 9.25\" Optical Tube Assembly combines a 234.95mm (9.25\") aperture with a 2350mm focal length for true astrograph performance. Its aplanatic, flat-field optical system achieves a theoretical resolution of 0.49 arc seconds (Dawes) and gathers 1127x more light than the human eye, delivering aberration-free stars across a wide photographic field. Weighing just 21 lbs, this OTA mounts securely to any CGE-compatible platform.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAplanatic EdgeHD Optics: 0.49 Arc Second Flat-Field Correction\u003c\/h3\u003e\n\u003cp\u003eThe core of the EdgeHD 9.25\" is its specialized optical design, which corrects for both coma and field curvature. Unlike standard Schmidt-Cassegrain telescopes (SCTs) that produce sharp stars only at the center, the EdgeHD system is a true aplanatic Schmidt-Cassegrain that delivers pinpoint stars right to the edge of the field of view. This design achieves a diffraction-limited resolution of 0.49 arc seconds, ensuring that fine details on planets and in tight double stars are not compromised by optical aberrations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 42mm Image Circle for Full-Frame Sensors\u003c\/h3\u003e\n\u003cp\u003eCelestron designed the EdgeHD system to function as a high-end astrograph. It produces a focal plane more than three times flatter than a standard SCT, resulting in a 42mm corrected image circle. This generous field fully illuminates full-frame camera sensors, ensuring round, sharp stars without the focus fall-off or vignetting common in other designs. For imagers, this means more usable data from every exposure and the freedom to frame large targets like the Andromeda Galaxy (M31) or the Rosette Nebula (NGC 2244) without compromise.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMechanical Design: Mirror Clutches and Tube Vents for Stable Imaging\u003c\/h3\u003e\n\u003cp\u003eBeyond the optics, the EdgeHD 9.25\" tube incorporates critical mechanical features for serious astrophotography. Flexible tension clutches hold the primary mirror in place after focusing, dramatically reducing the \"image shift\" that can ruin long exposures. This ensures your guide star stays locked and your final image is sharp. Rear-cell cooling vents with 50-mesh filters allow the primary mirror to reach thermal equilibrium with the ambient air more quickly, minimizing tube currents and improving image stability for planetary and deep-sky work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging Versatility: Native f\/10 and Ultra-Fast f\/2 Fastar System\u003c\/h3\u003e\n\u003cp\u003eThis OTA is an exceptionally versatile instrument. At its native f\/10 focal ratio, the 2350mm focal length provides the image scale needed to resolve fine details in small galaxies and planetary nebulae. For high-resolution lunar and planetary imaging, adding a Barlow lens pushes the magnification toward the 555x useful limit. For wide-field imaging, all EdgeHD tubes are Fastar-compatible; by replacing the secondary mirror with an optional HyperStar lens assembly, the system converts to an incredibly fast f\/2 imaging platform, reducing exposure times by a factor of 25.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEdgeHD 9.25\" vs. Standard SCT: Beyond Coma Correction\u003c\/h3\u003e\n\u003cp\u003eWhile a standard Celestron 9.25\" SCT is a capable visual instrument, the EdgeHD 9.25\" is engineered specifically for astrophotography. The key difference lies in the focal plane.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocal Plane:\u003c\/strong\u003e A standard SCT has a curved focal plane. While visually acceptable, this causes stars at the edge of a flat camera sensor to appear out of focus. The EdgeHD provides a corrected, flat focal plane across a 42mm circle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOff-Axis Aberrations:\u003c\/strong\u003e The EdgeHD corrects for both coma and astigmatism, whereas a standard SCT only corrects for spherical aberration. This results in visibly tighter, rounder stars away from the center of the image.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Stability:\u003c\/strong\u003e The mirror clutches and cooling vents are exclusive to the EdgeHD line and are essential for mitigating the most common challenges in long-exposure SCT imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary advantage of the EdgeHD 9.25\" over a standard SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is its \u003cstrong\u003eflat-field, aplanatic optical system\u003c\/strong\u003e. This corrects for both coma and field curvature, delivering pinpoint-sharp stars across the entire field of view on a flat camera sensor. A standard SCT only produces sharp stars in the center, with sharpness degrading towards the edges of an image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the EdgeHD 9.25\" perform on planetary targets like Jupiter or Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eExcellent. Its 2350mm native focal length provides high magnification straight out of the box. With its 0.49 arc second Dawes limit, it can resolve fine details like the Cassini Division in Saturn's rings or intricate cloud bands on Jupiter. The mirror clutches also prevent focus shift during an imaging session, which is critical for capturing sharp planetary video.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 21 lb weight of the EdgeHD 9.25\" manageable for a mid-range mount like a Celestron Advanced VX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the Advanced VX is rated for 30 lbs, the 21 lb weight of the OTA is pushing the limit for serious astrophotography once you add a camera, guide scope, and other accessories. For visual use, it's a good match. For imaging, a mount in the CGEM II or EQ6-R Pro class is recommended for optimal stability and tracking with the 2350mm focal length.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"Fastar-compatible\" mean for the EdgeHD 9.25\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFastar compatibility means you can remove the secondary mirror and install a third-party lens accessory (like a Starizona HyperStar). This converts the telescope from its native f\/10 to a very fast \u003cstrong\u003ef\/2 wide-field imaging system\u003c\/strong\u003e. This drastically reduces exposure times, allowing you to capture large nebulae and star fields with much shorter exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do the mirror clutches on the EdgeHD 9.25\" actually do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe mirror clutches are mechanical locks that hold the primary mirror in place after you've achieved focus. In standard SCTs, the mirror can slightly tilt or \"flop\" as the telescope moves across the sky, causing focus to shift. The clutches on the EdgeHD 9.25\" prevent this, ensuring your focus remains sharp and your guide star doesn't drift during long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill my full-frame DSLR or astronomy camera work well with the EdgeHD 9.25\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, perfectly. The EdgeHD 9.25\" produces a corrected \u003cstrong\u003e42mm image circle\u003c\/strong\u003e, which is large enough to cover most full-frame sensors without significant vignetting or loss of star quality at the corners. This makes it an ideal choice for imagers using large-format cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eEdgeHD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e234.95mm (9.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2350mm (93\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e42mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e1127x (Compared to human eye)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.49 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.59 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e14.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e555x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e34x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e85mm (3.35\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Diameter\u003c\/td\u003e\n\u003ctd\u003e36%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObstruction by Area\u003c\/td\u003e\n\u003ctd\u003e13%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFastar Compatible\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e559mm (22\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e271.78mm (10.7\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e21 lbs (9.53 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Finderscope\u003c\/td\u003e\n\u003ctd\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Star Diagonal\u003c\/td\u003e\n\u003ctd\u003e2\" with 1.25\" adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e23mm (102x)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron EdgeHD 9.25 OTA\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/celestron-edgehd-9-25-optical-tube-assembly-cge-dovetail-91031-x.jpg?v=1782187127\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eEdgeHD 9.25\" Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron 9x50 Finderscope\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/celestron-9x50-finderscope-with-bracket-51611.jpg?v=1782187127\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9x50 Finderscope and Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron 2-inch Star Diagonal\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/celestron-2-star-diagonal-with-1-25-adapter-93527.jpg?v=1782187127\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Star Diagonal with 1.25\" Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Celestron 23mm Eyepiece\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/celestron-25mm-omni-plossl-eyepiece-93319.jpg?v=1782187127\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e23mm Eyepiece, 2\"\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron_EdgeHD_Optics_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron EdgeHD Optics Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron-EdgeHD-Optics-Whitepaper.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron EdgeHD Optics Whitepaper\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967163855133,"sku":"CEL-91040-XLT","price":3860.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-EdgeHD-9-25-inch-Optical-Tube-Assembly-CGE-Dovetail-91040-XLT-1__48406.1594230385.1280.1280.jpg?v=1684337864"},{"product_id":"celestron-11-rasa-v2-ota-cge-dovetail","title":"Celestron 11\" RASA V2 OTA  - CGE Dovetail","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e279mm (11\") Rowe-Ackermann Schmidt Astrograph\u003c\/li\u003e\n\u003cli\u003eExtremely fast f\/2.2 focal ratio for short exposures\u003c\/li\u003e\n\u003cli\u003e620mm focal length ideal for wide-field deep-sky imaging\u003c\/li\u003e\n\u003cli\u003e43.3mm optimized image circle covers full-frame sensors\u003c\/li\u003e\n\u003cli\u003eUltra-Stable Focus System (USFS) minimizes mirror flop and focus shift\u003c\/li\u003e\n\u003cli\u003eWeighs 43 lbs (19.5 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eCelestron 11\" Rowe-Ackermann Schmidt Astrograph (RASA 11) V2\u003c\/h2\u003e\n\u003cp\u003eThe Celestron 11\" Rowe-Ackermann Schmidt Astrograph (RASA 11) V2 combines a massive 279mm (11\") aperture with an incredibly fast f\/2.2 optical system to acquire deep-sky data in a fraction of the time required by f\/10 systems. Its 620mm focal length provides a vast field of view, while the 43.3mm optimized image circle illuminates full-frame sensors with pinpoint stars down to a spot size of less than 4.4 μm RMS. With 1588x the light-gathering power of the human eye, the RASA 11 V2 captures faint details with dramatically shorter sub-exposures, reducing demands on your equatorial mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe f\/2.2 Rowe-Ackermann Design: 1588x More Light Gathering Power\u003c\/h3\u003e\n\u003cp\u003eThe core of the RASA 11 V2 is its f\/2.2 focal ratio, a speed that fundamentally changes the imaging process. This allows you to collect the same amount of signal in minutes as a traditional f\/10 Schmidt-Cassegrain collects in hours. The immediate benefit is that tracking and autoguiding become far less critical; many targets can be captured with short, unguided exposures.\u003c\/p\u003e\n\u003cp\u003eThis 4-element rare-earth glass system is engineered for a wide 400-700 nm wavelength range, delivering images free of false color, coma, and field curvature. With StarBright XLT coatings, light transmission is maximized, ensuring faint galactic dust lanes and nebulosity are recorded with exceptional contrast and clarity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 43.3mm Image Circle for Full-Frame Sensors\u003c\/h3\u003e\n\u003cp\u003eDesigned for modern astronomy cameras, the RASA 11 V2 produces a 43.3mm optimized image circle, providing vignette-free results on full-frame (35mm format) CMOS and CCD sensors. The usable field extends to 52mm with only minimal performance loss, accommodating even the largest chips available to amateurs. This wide, flat field ensures stars remain sharp across the entire frame, a critical attribute for creating large-scale mosaics or surveying the sky.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRMS Spot Size:\u003c\/strong\u003e At less than 4.4 μm across the field of view, the optical system resolves finer detail than the pixel size of most modern cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOff-Axis Illumination:\u003c\/strong\u003e The field is evenly illuminated, maintaining 83% brightness even at 21mm off-axis, simplifying flat-field calibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentral Obstruction:\u003c\/strong\u003e The 114mm central obstruction, at 41% of the aperture diameter, is a necessary trade-off for the extreme f\/2.2 speed and wide, corrected field.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eUltra-Stable Focus System (USFS): Eliminating Image Shift\u003c\/h3\u003e\n\u003cp\u003eA common challenge in moving-mirror telescopes is image shift and mirror flop. The RASA 11 V2 solves this with the Ultra-Stable Focus System (USFS). By using a precision linear ball bearing to support the primary mirror, the USFS prevents unwanted lateral movement during focusing and maintains focus as the telescope moves across the sky. This robust system is compatible with the optional Celestron Focus Motor for automated and remote focusing routines.\u003c\/p\u003e\n\u003cp\u003eAn integrated 12V DC MagLev fan accelerates thermal stabilization, reducing cooldown time so you can start imaging sooner. The fan pulls air through filtered vents, providing optimal airflow without introducing dust into the optical tube.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging Ready with 55mm Back Focus and Dual Dovetails\u003c\/h3\u003e\n\u003cp\u003eEvery component of the RASA 11 V2 is engineered for seamless integration into your imaging setup. It provides a standard 55mm back focus distance when using the included 42mm T-thread or 48mm camera adapters, matching the requirement of most DSLRs and dedicated astronomy cameras. This simplifies the process of achieving perfect spacing for optimal optical performance.\u003c\/p\u003e\n\u003cp\u003eThe optical tube is equipped with two dovetail bars. The primary CGE dovetail bar provides a secure connection to your equatorial mount, while a second CGE bar on top serves as a sturdy mounting point for accessories like a guidescope, power distribution box, or mini-computer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRASA 11 V2 vs. an 11\" SCT with HyperStar: A Dedicated Imaging System\u003c\/h3\u003e\n\u003cp\u003eImagers often compare the RASA 11 to an 11\" SCT equipped with a HyperStar lens. While both achieve a similar f-ratio, they are designed for different purposes.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompetitor Advantage:\u003c\/strong\u003e An SCT with HyperStar offers convertibility. You can remove the HyperStar and use the telescope at its native f\/10 for visual observation or high-resolution planetary imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRASA Advantage:\u003c\/strong\u003e The RASA 11 is a dedicated astrograph, optimized from the ground up for one purpose: wide-field f\/2.2 imaging. Its Ultra-Stable Focus System (USFS) provides superior focus stability compared to a standard SCT's moving-mirror focuser. The 4-element lens group is permanently integrated and aligned, removing the complexities of installing and collimating a separate lens assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the Celestron RASA 11 V2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe RASA 11 V2 optical tube weighs 43 lbs (19.5 kg). To ensure stable tracking, especially for longer exposures, you will need a robust equatorial mount with a payload capacity of at least 60-70 lbs. A Celestron CGX-L or equivalent-class mount is recommended for optimal performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach my camera to the RASA 11 V2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe RASA 11 V2 includes both a 42mm T-thread adapter and a 48mm adapter. These adapters position your camera sensor at the required 55mm back focus distance. Simply choose the adapter that matches your camera's T-ring or filter wheel, thread it onto the RASA's front lens assembly, and attach your camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the RASA 11 V2 for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Rowe-Ackermann Schmidt Astrograph is a dedicated photographic instrument. The prime-focus design, where the camera is mounted at the front of the tube, does not accommodate an eyepiece for visual use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 620mm focal length of the RASA 11 V2 suitable for imaging large targets like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The 620mm focal length combined with a full-frame sensor provides a massive field of view that can easily frame the entire Andromeda Galaxy (M31), the North America Nebula (NGC 7000), or the Rho Ophiuchi cloud complex in a single shot. It is an ideal instrument for capturing the largest structures in the night sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the Ultra-Stable Focus System (USFS) on the RASA 11?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe USFS is a major mechanical upgrade that solves two common issues with moving-mirror telescopes: \u003cstrong\u003efocus shift\u003c\/strong\u003e (image movement while turning the focus knob) and \u003cstrong\u003emirror flop\u003c\/strong\u003e (mirror tilt as the telescope points to different parts of the sky). By supporting the mirror on a linear ball bearing, the USFS ensures the primary mirror moves precisely without tilting, resulting in sharper images and more reliable autofocusing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy would I choose the RASA 11 V2 over a standard 11\" SCT for deep-sky imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe RASA 11 V2 is a specialized tool. Its f\/2.2 speed is significantly faster than a standard f\/7 or f\/6.3 reduced SCT, allowing for much shorter exposures. Its integrated optics are permanently aligned for a wide, flat field, and its USFS focuser is more stable than a standard SCT focuser. If your primary goal is wide-field deep-sky imaging, the RASA is the more efficient and optimized instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eRowe-Ackermann Schmidt Astrograph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e279mm (11\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e620mm (24.4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/2.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e43.3mm (1.7\") Ø\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseable Field\u003c\/td\u003e\n\u003ctd\u003e52mm (2.04\") Ø\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e1588x (Compared to human eye)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.41 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.49 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 4.4 μm RMS across FOV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Obstruction Diameter\u003c\/td\u003e\n\u003ctd\u003e114mm (4.48\") (41% of aperture)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 - 700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-axis Illumination\u003c\/td\u003e\n\u003ctd\u003e83% at 21mm off-axis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus (with adapter)\u003c\/td\u003e\n\u003ctd\u003e55mm (2.16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus (from collar)\u003c\/td\u003e\n\u003ctd\u003e72.8mm (2.86\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eUltra-Stable Focus System (USFS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e838.2mm (33\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e330.2mm (13\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e43 lbs (19.5 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFeatures\u003c\/td\u003e\n\u003ctd\u003eVentilation fan, dual dovetail mounting bars\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e11\" Rowe-Ackermann Schmidt Astrograph V2 OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e42mm T-thread camera adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e48mm camera adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFan battery pack\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDust Cover\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron-RASA-Optics-Whitepaper.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload RASA Optics Whitepaper\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThis product is covered by Celestron's 2-Year Limited Telescope Warranty. For complete warranty details, please visit the \u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron Warranty Policy\u003c\/a\u003e page.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967184695581,"sku":"CEL-91076","price":6254.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron-11-inch-Rowe-Ackermann-Schmidt-Astrograph-RASA-11-V2-Optical-Tube-Assembly-CGE-Dovetail-91076-1__46768.1594230530.1280.1280.jpg?v=1684338358"},{"product_id":"sky-watcher-quattro-200p-imaging-newtonian-8-205-mm","title":"Sky-Watcher Quattro 200P Imaging Newtonian 8\" (205 mm)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e203mm (8-inch) Newtonian Reflector Astrograph\u003c\/li\u003e\n\u003cli\u003eFast f\/4 Focal Ratio for Short Exposures\u003c\/li\u003e\n\u003cli\u003e800mm Focal Length\u003c\/li\u003e\n\u003cli\u003e94% Reflectivity Radiant™ Aluminum Quartz (RAQ) Coatings\u003c\/li\u003e\n\u003cli\u003e2-inch Dual-Speed Crayford Focuser\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSky-Watcher Quattro 200P Imaging Newtonian\u003c\/h2\u003e\n\u003cp\u003eThe Sky-Watcher Quattro 200P Imaging Newtonian combines a large 203mm primary mirror with a very fast f\/4 focal ratio to dramatically reduce exposure times for deep-sky astrophotography. Its 800mm focal length provides an ideal image scale for capturing detail in galaxies and nebulae, while the borosilicate mirror's Radiant Aluminum Quartz (RAQ) coatings ensure 94% reflectivity for brighter, higher-contrast images. With a total weight of just 21 lbs, this optical tube is engineered for imagers who need large-aperture light gathering on a mid-range equatorial mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCapture Images 6x Faster with an f\/4 Optical Design\u003c\/h3\u003e\n\u003cp\u003eThe Quattro 200P's f\/4 focal ratio is its defining feature, gathering light significantly faster than standard f\/10 Schmidt-Cassegrains. This speed allows you to capture detailed, high signal-to-noise images of faint deep-sky objects in a fraction of the time, reducing demands on your mount's tracking and minimizing guiding errors. This makes it possible to complete complex projects like the full expanse of the Orion Nebula (M42) or the Andromeda Galaxy (M31) in a single night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e94% Reflectivity and an Oversized 70mm Secondary\u003c\/h3\u003e\n\u003cp\u003eSky-Watcher uses proprietary Radiant™ Aluminum Quartz (RAQ™) coatings on the primary mirror, achieving 94% reflectivity for maximum light transmission. This is paired with an oversized 70mm secondary mirror that provides a fully illuminated field for large sensors, including full-frame DSLRs and dedicated astronomy cameras. This combination prevents vignetting and ensures the edges of your frame are just as bright as the center.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBorosilicate Primary Mirror:\u003c\/strong\u003e Provides excellent thermal stability, reducing the time needed for the telescope to acclimate to ambient temperatures and maintaining focus throughout your imaging session.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e34% Secondary Obstruction:\u003c\/strong\u003e The 70mm secondary creates a 34% central obstruction by diameter, a necessary trade-off for providing full illumination to large camera sensors in a fast optical system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready with a 2-inch Dual-Speed Focuser\u003c\/h3\u003e\n\u003cp\u003eUnlike visual-oriented Newtonians, the Quattro 200P comes equipped from the factory for astrophotography. The 2-inch, 10:1 dual-speed Crayford focuser allows for precise, repeatable focusing adjustments critical for achieving sharp stars. The robust design handles the weight of a full imaging train, including a camera, filter wheel, and off-axis guider, without flexure or slippage. The OTA also includes a 9x50 straight-through finderscope, tube rings, and a V-style dovetail for immediate mounting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eVisual Astronomy: A Capable Dual-Purpose Scope\u003c\/h3\u003e\n\u003cp\u003eWhile designed as an astrograph, the Quattro 200P's large 203mm aperture also makes it a powerful instrument for visual observation. With a limiting magnitude of 14, it resolves fine detail in globular clusters like the Hercules Cluster (M13) and reveals faint structures in distant galaxies. The fast f\/4 system delivers exceptionally wide, bright fields of view at low power, creating an immersive \"spacewalk\" experience when sweeping through the Milky Way.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Trade-Off: Coma and the Need for a Corrector\u003c\/h3\u003e\n\u003cp\u003eA key characteristic of fast Newtonian telescopes is coma, an optical aberration that causes stars at the edge of the field to appear elongated. The Quattro 200P is no exception. While visually acceptable, for astrophotography achieving pin-point stars across the entire frame requires the use of an optional coma corrector. This is a critical accessory for anyone serious about imaging with this OTA and is necessary to unlock its full potential.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Sky-Watcher Quattro 200P?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an OTA weight of 21 lbs, the Quattro 200P requires a mid-range equatorial mount for astrophotography. A mount with a payload capacity of at least 30-40 lbs, such as the Sky-Watcher EQ6-R Pro or a similar class mount, is recommended to handle the additional weight of a camera, guide scope, and other accessories while maintaining precise tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs a coma corrector necessary for the Quattro 200P?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for serious astrophotography, a coma corrector is essential. The fast f\/4 optical system inherently produces coma, which will make stars at the edge of your images appear distorted. For visual use, it is less of an issue, but for imaging, a coma corrector is required to achieve sharp, round stars across the entire sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Quattro 200P perform on planets like Jupiter in an 8\" f\/4 system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quattro 200P's 800mm focal length is relatively short for planetary imaging, which typically benefits from longer focal lengths. However, you can achieve excellent results by adding a 3x or 5x Barlow lens to increase the effective focal length. The 203mm aperture provides a high theoretical resolution (0.57 arc-seconds Dawes Limit), allowing you to resolve Jupiter's main cloud bands, the Great Red Spot, and shadow transits of its moons.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Quattro 200P for visual astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The large 203mm aperture and bright f\/4 optics provide stunning, wide-field views of deep-sky objects. It excels at observing large nebulae like the North American Nebula (NGC 7000) and sweeping through the dense star fields of the Milky Way. While optimized for imaging, it is a very capable visual instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow often will I need to collimate the Quattro 200P?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eLike all Newtonian reflectors, the Quattro 200P will require periodic collimation (alignment of the mirrors). The fast f\/4 focal ratio is less forgiving of collimation errors than slower systems. It's good practice to check collimation before every imaging session, especially if the telescope has been transported. Using a laser collimator can make this process quick and straightforward.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the 70mm secondary mirror?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe oversized 70mm secondary mirror is crucial for astrophotography with modern cameras. It creates a large, fully illuminated image circle that can cover the sensors of APS-C and even full-frame cameras without causing vignetting (darkening at the corners of the image). This ensures your entire frame is evenly lit, which is critical for producing high-quality images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eNewtonian\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture\u003c\/td\u003e\n\u003ctd\u003e203mm (8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e800mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ)™ with 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBorosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e70mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e34%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by area)\u003c\/td\u003e\n\u003ctd\u003e12%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e0.57 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e0.69 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e400x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e29x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" Dual-Speed Crayford (10:1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e28\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e9.375\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e21 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinder Scope\u003c\/td\u003e\n\u003ctd\u003e9x50 Straight-Through\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Accessories\u003c\/td\u003e\n\u003ctd\u003eTube Rings \u0026amp; V-style Dovetail Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234112109\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eQuattro 200P Newtonian OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9x50 Finderscope with Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Dual-Speed Crayford Focuser\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" to 1.25\" Eyepiece Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eV-style Dovetail Plate\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher_Newtonian_Dobsonian_Collimation_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Collimation Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/sky-watcher-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSky-Watcher 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44967190135069,"sku":"SW-S11210","price":1290.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher-Quattro-200P-Imaging-Newtonian-8inch-205-mm-S11210-1__46916.1594170760.1280.1280.jpg?v=1684338343"},{"product_id":"sky-watcher-quattro-250p-imaging-newtonian-10-254-mm","title":"Sky-Watcher Quattro 250P Imaging Newtonian 10\" (254 mm)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e254mm (10-inch) Newtonian Reflector Astrograph\u003c\/li\u003e\n\u003cli\u003e1000mm Focal Length\u003c\/li\u003e\n\u003cli\u003eFast f\/4 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e94% Reflectivity Radiant™ Aluminum Quartz (RAQ) Coatings\u003c\/li\u003e\n\u003cli\u003e2-inch Dual-Speed Crayford Focuser\u003c\/li\u003e\n\u003cli\u003e9x50 Finderscope\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSky-Watcher Quattro 250P Imaging Newtonian\u003c\/h2\u003e\n\u003cp\u003eThe Sky-Watcher Quattro 250P Imaging Newtonian combines a large 254mm aperture with a fast f\/4 focal ratio and 1000mm focal length to create a powerful light-gathering instrument for serious astrophotography. Its borosilicate primary mirror features Radiant™ Aluminum Quartz (RAQ) coatings that achieve 94% reflectivity, ensuring maximum light reaches your sensor. With a total OTA weight of 36.5 lbs, this astrograph is engineered to acquire deep-sky data in a fraction of the time required by slower optical systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCapture Images 6x Faster with an f\/4 Optical System\u003c\/h3\u003e\n\u003cp\u003eThe defining feature of the Quattro 250P is its aggressive f\/4 focal ratio. This optical speed allows you to gather the same amount of light in a 5-minute exposure as a typical 8-inch f\/10 Schmidt-Cassegrain would in 30 minutes. This 6x speed advantage dramatically reduces total imaging time, minimizes guiding errors, and lets you complete complex projects in a single night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 254mm Aperture for High-Resolution Visuals and Imaging\u003c\/h3\u003e\n\u003cp\u003eWith a 254mm (10-inch) primary mirror, the Quattro 250P resolves detail down to a Dawes' limit of 0.46 arcseconds, separating tight double stars and revealing fine structures in planetary atmospheres. For deep-sky imagers, this large aperture translates into brighter images and higher signal-to-noise ratios, pulling faint outer structures from galaxies and resolving individual stars in distant clusters. Visually, the scope can reach a limiting magnitude of 14.5 under dark skies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOptimized for Full-Frame Sensors with an 89mm Secondary Mirror\u003c\/h3\u003e\n\u003cp\u003eTo fully illuminate the large sensors in modern DSLR and dedicated astronomy cameras, the Quattro 250P employs an oversized 89mm secondary mirror. While this results in a 35% central obstruction by diameter, it provides a bright, unvignetted field of view essential for flat-field imaging. This design choice prioritizes photon collection over the subtle contrast loss on planetary targets, a trade-off that is ideal for its primary role as a deep-sky astrograph. An optional coma corrector is recommended to achieve sharp stars across the entire frame.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Speed Focuser:\u003c\/strong\u003e The included 2-inch, 10:1 dual-speed Crayford focuser allows for precise, repeatable focus adjustments critical for sharp stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReady to Mount:\u003c\/strong\u003e The optical tube comes complete with mounting rings and a V-style dovetail bar for immediate attachment to a compatible equatorial mount.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinder Included:\u003c\/strong\u003e A 9x50 optical finderscope provides a wide field of view to easily locate and center targets before imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the Sky-Watcher Quattro 250P?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quattro 250P has an OTA weight of 36.5 lbs. For astrophotography, you should use a mount with a payload capacity of at least 50-60 lbs to ensure stability and precise tracking. Mounts in the Sky-Watcher EQ6-R Pro or a similar class are the recommended starting point for this instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs a coma corrector required for the Quattro 250P?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for serious astrophotography, a coma corrector is essential. The fast f\/4 focal ratio of the Quattro 250P will exhibit significant coma (elongated stars) at the edges of the field of view without correction. Adding a matched coma corrector will produce sharp, point-like stars across the entire image sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Quattro 250P perform on the Orion Nebula (M42) with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quattro 250P is an excellent choice for large targets like the Orion Nebula (M42). Its 1000mm focal length will frame the nebula and its surrounding structures perfectly on a full-frame sensor. The fast f\/4 optics will allow you to capture the faint outer nebulosity in very short exposures while retaining enough dynamic range to resolve the bright Trapezium cluster at its core.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Quattro 250P for visual astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While designed for imaging, the large 254mm aperture makes it a fantastic visual instrument. It will provide bright, detailed views of the Moon, planets, and deep-sky objects. The 35% central obstruction is a compromise for imaging illumination and will have a minor impact on the highest-contrast planetary views compared to a long-focus Newtonian, but the deep-sky views will be expansive and bright.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 35% secondary obstruction of the Quattro 250P mean in practice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 35% secondary obstruction is a direct result of the large 89mm secondary mirror needed to illuminate imaging sensors without vignetting. For imaging, this is a positive design feature. For visual use, it causes a slight reduction in peak contrast on very high-resolution targets like Jupiter's cloud bands compared to a scope with a smaller obstruction, but its effect is minimal for most deep-sky observing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the included focuser on the Quattro 250P handle heavy cameras?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe included 2-inch dual-speed Crayford focuser is robust and provides smooth, precise focusing. It can handle most DSLRs and many dedicated astronomy cameras with filter wheels. For very heavy imaging trains, some users may choose to upgrade to a rack-and-pinion style focuser for increased load capacity and zero slippage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eNewtonian\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture\u003c\/td\u003e\n\u003ctd\u003e254mm (10\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1000mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ)™ with 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBorosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e89mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e35%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by area)\u003c\/td\u003e\n\u003ctd\u003e12%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e0.46 arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e0.55 arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e14.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e36x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e500x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" Dual Speed Crayford\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e36.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e11.375\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e36.5 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinder Scope\u003c\/td\u003e\n\u003ctd\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Accessories\u003c\/td\u003e\n\u003ctd\u003eTube Rings \u0026amp; V-style Dovetail Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234112208\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eQuattro 250P Newtonian OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Dual-Speed 10:1 Crayford Focuser\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" to 1.25\" Eyepiece Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9x50 Finderscope with Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eV-style Dovetail Plate\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher_Quattro_200P_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Quattro Imaging Newtonian Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher_Newtonian_Dobsonian_Collimation_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Newtonian Collimation Guide\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/sky-watcher-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSky-Watcher 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44967190200605,"sku":"SW-S11220","price":1840.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher-Quattro-250P-Imaging-Newtonian-10inch-254-mm-S11220-1__23353.1594170761.1280.1280.jpg?v=1684338355"},{"product_id":"sky-watcher-quattro-300p-imaging-newtonian-12-305-mm","title":"Sky-Watcher Quattro 300P Imaging Newtonian 12\" (305 mm)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e305mm (12\") Newtonian Reflector Astrograph\u003c\/li\u003e\n\u003cli\u003e1200mm Focal Length\u003c\/li\u003e\n\u003cli\u003eFast f\/4 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e94% Reflectivity Radiant™ Aluminum Quartz (RAQ™) Coatings\u003c\/li\u003e\n\u003cli\u003e57 lb. Optical Tube Assembly Weight\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSky-Watcher Quattro 300P Imaging Newtonian\u003c\/h2\u003e\n\u003cp\u003eThe Sky-Watcher Quattro 300P Imaging Newtonian combines a massive 305mm primary mirror with a fast f\/4 focal ratio to create a powerful astrograph for deep-sky imaging. Its 1200mm focal length is ideal for capturing detail in galaxies and nebulae, while the 94% reflectivity from its Radiant™ Aluminum Quartz (RAQ)™ coatings ensures maximum light reaches your sensor. This optical tube, weighing 57 lbs, is built for serious imagers seeking a significant aperture advantage without the extreme focal lengths of other designs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFast f\/4 Imaging and 1200mm Focal Length\u003c\/h3\u003e\n\u003cp\u003eThe key advantage of the Quattro 300P is its f\/4 native focal ratio. This optical speed allows you to capture deep-sky objects with significantly shorter exposure times compared to slower f\/ratio telescopes, reducing demands on your mount's tracking and maximizing your time under clear skies. The 1200mm focal length provides the magnification needed to frame and resolve details in a huge range of deep-sky targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e305mm Aperture with 94% Reflectivity Coatings\u003c\/h3\u003e\n\u003cp\u003eWith a 305mm (12-inch) borosilicate primary mirror, the Quattro 300P gathers 44% more light than the next size down, translating directly to brighter images and the ability to capture fainter details. Sky-Watcher’s proprietary Radiant™ Aluminum Quartz (RAQ)™ coatings deliver 94% reflectivity, ensuring that the light collected by the large primary is efficiently transmitted to the focal plane. This combination provides the high-contrast, brilliant views needed for both imaging and visual observation up to a practical maximum of 600x.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Optimized Design: 102mm Secondary Mirror\u003c\/h3\u003e\n\u003cp\u003eTo fully illuminate the large sensors in modern DSLRs and dedicated astronomy cameras, the Quattro 300P uses an oversized 102mm secondary mirror. This minimizes vignetting and provides a bright, even field of view, which is critical for astrophotography. While this results in a 33% central obstruction by diameter, it's a necessary trade-off for superior full-frame imaging capability. For the sharpest stars across the entire frame, an optional coma corrector is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eQuattro 300P vs. a Standard 8\" SCT\u003c\/h3\u003e\n\u003cp\u003eWhen choosing an imaging platform, many consider a classic Schmidt-Cassegrain. The Quattro 300P offers a fundamentally different approach focused on speed.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExposure Speed:\u003c\/strong\u003e The Quattro's primary advantage is its f\/4 focal ratio. As stated in its documentation, it can achieve the same exposure depth up to 6 times faster than a typical 8-inch f\/10 SCT, drastically reducing imaging time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAperture and Light Gathering:\u003c\/strong\u003e With its 305mm mirror, the Quattro 300P has over double the light-collecting area of a 203mm (8\") telescope, resulting in brighter, higher-resolution images of faint objects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField of View:\u003c\/strong\u003e The Quattro's 1200mm focal length provides a much wider field of view than the typical 2000mm+ focal length of an 8\" SCT, making it better suited for large nebulae and star clusters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrade-offs:\u003c\/strong\u003e The SCT is a more compact, sealed system that is less prone to dust and requires less frequent collimation. The Quattro requires careful collimation and an optional coma corrector for peak performance but delivers unparalleled speed and aperture for its cost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMechanical Build and Included Accessories\u003c\/h3\u003e\n\u003cp\u003eThe Quattro 300P features a robust rolled steel optical tube with a 14.25\" outer diameter, finished in Sky-Watcher's signature Black Diamond coating. Focusing is handled by a 2\" dual-speed 10:1 Crayford-style focuser for precise adjustments. The package is ready to mount, including a pair of tube rings and a D-style dovetail rail, along with a 9x50 optical finderscope to help locate targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Sky-Watcher Quattro 300P?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quattro 300P optical tube assembly weighs 57 lbs. For serious astrophotography, you will need a robust equatorial mount with a payload capacity of at least 80-90 lbs to ensure stability and precise tracking. Mounts in the Sky-Watcher EQ8-R Pro or similar class are recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Quattro 300P perform on planetary imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile designed for deep-sky imaging, the Quattro 300P's large 305mm aperture and 0.38 arc-second Dawes limit allow it to resolve fine planetary detail. Its 1200mm focal length is shorter than ideal for planets, so you will need to use a 3x or 5x Barlow lens to increase the effective focal length and achieve the necessary image scale for capturing features on Jupiter or Saturn.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs a coma corrector necessary for the Quattro 300P?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor astrophotography, especially with sensors larger than APS-C, a coma corrector is highly recommended. The fast f\/4 focal ratio of a Newtonian telescope naturally produces coma, an aberration that elongates stars at the edge of the field. A corrector will ensure sharp, point-like stars across the entire image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Sky-Watcher Quattro 300P for visual astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While optimized for imaging, the massive 305mm aperture makes it a fantastic visual instrument. It provides bright, detailed views of everything from faint galaxies to globular clusters. With a limiting magnitude of 14.9, it excels at revealing faint deep-sky objects from a dark sky site.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the 102mm secondary mirror on the Quattro 300P?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe oversized 102mm secondary mirror provides a larger, fully illuminated field of view at the focal plane. This is critical for astrophotography with full-frame DSLR or CCD\/CMOS cameras, as it prevents vignetting (darkening of the corners) and ensures even illumination across the entire sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I collimate the Sky-Watcher Quattro 300P?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eLike all Newtonian reflectors, the Quattro 300P requires periodic collimation (alignment of the mirrors). This is typically done using a laser collimator or a Cheshire eyepiece. You will adjust the tilt of the secondary mirror (under the focuser) and the primary mirror (at the back of the tube) to ensure the optical path is perfectly aligned for sharp images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234112307\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eNewtonian\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture\u003c\/td\u003e\n\u003ctd\u003e305mm (12\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ)™ coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Reflectivity\u003c\/td\u003e\n\u003ctd\u003e94%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBorosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Edge Thickness\u003c\/td\u003e\n\u003ctd\u003e38mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e102mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e33%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by area)\u003c\/td\u003e\n\u003ctd\u003e11%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" Dual-Speed Crayford\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e0.38 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e0.46 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e14.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e43x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e600x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e42.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e14.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e57 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eQuattro 300P OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9x50 Finderscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eD-Style Dovetail Rail\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" to 1.25\" Eyepiece Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher_Quattro_200P_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Sky-Watcher Quattro 300P Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/sky-watcher-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSky-Watcher 2-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44967190233373,"sku":"SW-S11230","price":2770.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher-Quattro-300P-Imaging-Newtonian-12inch-305-mm-S11230-1__45761.1594170762.1280.1280.jpg?v=1684338368"},{"product_id":"sky-watcher-skymax-102","title":"Sky-Watcher Skymax 102","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e102mm Maksutov-Cassegrain Optical Tube\u003c\/li\u003e\n\u003cli\u003e1300mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/12.7 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e94% Reflectivity RAQ™ Mirror Coatings\u003c\/li\u003e\n\u003cli\u003eWeighs Only 4.6 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSky-Watcher Skymax 102 Maksutov-Cassegrain\u003c\/h2\u003e\n\u003cp\u003eThe Sky-Watcher Skymax 102 delivers high-contrast planetary and lunar views using its 102mm aperture and long 1300mm focal length. Its f\/12.7 focal ratio is optimized for high magnification, resolving details down to the 1.14 arc-second Dawes limit. The entire optical tube weighs just 4.6 lbs and measures 12.25 inches long, making it an exceptionally portable instrument for detailed solar system observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePlanetary Detail from a 1300mm Focal Length\u003c\/h3\u003e\n\u003cp\u003eThe Maksutov-Cassegrain design packs a 1300mm focal length into a compact optical tube, providing the high power necessary to resolve fine details on planets. This long focal length, combined with the included 10mm eyepiece, yields 130x magnification straight out of the box, ideal for studying Jupiter's cloud bands, Saturn's rings, and the cratered surface of the Moon.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHigh-Contrast Optics with 94% Reflectivity\u003c\/h3\u003e\n\u003cp\u003eThe Skymax 102 uses primary and secondary mirrors made from borosilicate glass, coated with Sky-Watcher's Radiant™ Aluminum Quartz™ (RAQ™) coatings for 94% reflectivity. The meniscus corrector lens is fully multi-coated to maximize light transmission and reduce chromatic aberration. This optical system features a small secondary obstruction of only 30% by diameter, which protects image contrast compared to other catadioptric designs, rendering deep black skies around bright targets.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimal Light Scatter:\u003c\/strong\u003e The small central obstruction ensures that more light from the primary mirror contributes to the final image, enhancing the contrast between subtle planetary features.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharp to the Edge:\u003c\/strong\u003e The Maksutov design provides a well-corrected field of view, keeping stars sharp and planetary limbs clearly defined without significant distortion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eGrab-and-Go Setup at Only 4.6 lbs\u003c\/h3\u003e\n\u003cp\u003eWeighing only 4.6 lbs and fitting into the included soft case, the Skymax 102 is an ideal travel telescope or a convenient option for quick backyard sessions. It mounts easily to virtually any light-duty photo tripod or astronomical mount via its integrated V-style dovetail rail. This portability makes it a practical choice for observers who need a powerful telescope without the bulk of a large refractor or Newtonian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComplete Observing Kit with 2 Eyepieces\u003c\/h3\u003e\n\u003cp\u003eThe Skymax 102 arrives ready for observation with a full set of essential accessories. You get two wide-angle 1.25\" eyepieces, a 25mm for wide-field locating (52x) and a 10mm for high-power views (130x). Also included are a red dot finder for easy aiming and a 1.25\" star diagonal for comfortable viewing angles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I see with the Sky-Watcher Skymax 102?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sky-Watcher Skymax 102 excels at high-magnification views of solar system objects. You can expect to see detailed craters and mountains on the Moon, the phases of Venus, the polar ice caps on Mars, Jupiter's main cloud belts and its four Galilean moons, and the rings of Saturn. Brighter deep-sky objects like the Orion Nebula (M42) and the Hercules Cluster (M13) are also visible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Skymax 102 perform on Jupiter with its 1300mm focal length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 1300mm focal length is a major advantage for viewing Jupiter. Using the included 10mm eyepiece for 130x magnification, you will clearly resolve the two main equatorial belts. Under steady seeing conditions, you can push the magnification towards its 201x maximum with an optional shorter focal length eyepiece or Barlow lens to see more subtle cloud bands and potentially the Great Red Spot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the f\/12.7 Skymax 102 good for deep-sky objects?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile optimized for planets, the Skymax 102 can view many deep-sky objects. Its high-contrast optics make it excellent for splitting double stars and observing compact targets like planetary nebulae and globular clusters. However, its f\/12.7 focal ratio results in a narrow field of view, making it less suitable for very large nebulae or open clusters that require a wider perspective.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the Skymax 102?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an OTA weight of only \u003cstrong\u003e4.6 lbs\u003c\/strong\u003e, the Skymax 102 is very lightweight and versatile. It can be used on a sturdy photographic tripod for casual viewing or on a light-duty astronomical mount like a Sky-Watcher AZ-GTi or Star Adventurer GTi for more serious observing and tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose the Skymax 102 Maksutov over a refractor of similar aperture?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main advantage is its compact size. A 102mm refractor with a 1300mm focal length would be over four feet long and difficult to manage. The Skymax 102 provides the same focal length in a 12.25-inch tube, making it far more portable and easier to mount. It also offers this performance without the chromatic aberration (false color) that can affect achromatic refractors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Skymax 102 a good telescope for a beginner?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice. The Maksutov design holds its collimation well, making it very low-maintenance. The long focal length makes it easy to achieve high power for exciting planetary views, and the included accessories provide everything needed to start observing right away.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture\u003c\/td\u003e\n\u003ctd\u003e102mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/12.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBK7 \/ Borosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e30%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by area)\u003c\/td\u003e\n\u003ctd\u003e9%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering\u003c\/td\u003e\n\u003ctd\u003e28% more than 90mm model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e1.14 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e1.37 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e12.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e201x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e14x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003ePrimary Mirror Focusing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e12.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Diameter\u003c\/td\u003e\n\u003ctd\u003e4.625\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e4.6 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepieces\u003c\/td\u003e\n\u003ctd\u003e25mm \u0026amp; 10mm Wide Angle (1.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification (with included eyepieces)\u003c\/td\u003e\n\u003ctd\u003e52x \/ 130x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Diagonal\u003c\/td\u003e\n\u003ctd\u003e1.25\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Finder\u003c\/td\u003e\n\u003ctd\u003eRed Dot Finder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eV-style Dovetail Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234115100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSkymax 102mm Maksutov-Cassegrain OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e25mm Wide Angle Eyepiece (1.25\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e10mm Wide Angle Eyepiece (1.25\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Star Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eRed Dot Finder\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eV-style Dovetail Rail\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e(pre-installed)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSoft Carrying Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher_Polar_Alignment_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Polar Alignment Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/sky-watcher-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSky-Watcher 2-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44967190462749,"sku":"SW-S11510","price":490.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher-Skymax-102-S11510-1__91769.1594170769.1280.1280.jpg?v=1684338444"},{"product_id":"sky-watcher-skymax-127","title":"Sky-Watcher Skymax 127","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e127mm Maksutov-Cassegrain Optical Design\u003c\/li\u003e\n\u003cli\u003e1540mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/12.1 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eRadiant™ Aluminum Quartz™ (RAQ™) coatings with 94% reflectivity\u003c\/li\u003e\n\u003cli\u003eWeighs only 9.7 lbs\u003c\/li\u003e\n\u003cli\u003eIncludes 2\" 28mm Eyepiece, 6x30 Finder, and 2\" Diagonal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSky-Watcher Skymax 127 Maksutov-Cassegrain Telescope\u003c\/h2\u003e\n\u003cp\u003eThe Sky-Watcher Skymax 127 delivers exceptionally sharp planetary and lunar views through its 127mm aperture and long 1540mm focal length. Its Maksutov-Cassegrain design, combined with Radiant™ Aluminum Quartz™ (RAQ™) mirror coatings, achieves 94% reflectivity for high-contrast images. The entire optical tube assembly weighs just 9.7 lbs, making it a highly portable instrument capable of resolving details down to a 0.91 arcsecond Dawes limit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ef\/12.1 Focal Ratio for High-Contrast Detail\u003c\/h3\u003e\n\u003cp\u003eThe Skymax 127's native 1540mm focal length and f\/12.1 focal ratio are engineered for high-magnification observing. This long focal ratio darkens the sky background and increases image contrast, allowing you to resolve fine details like Jupiter's cloud bands, Saturn's Cassini Division, and subtle crater wall textures on the Moon. Unlike faster optical systems, this design excels at splitting tight double stars and revealing planetary features without requiring supplemental Barlow lenses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e94% Reflectivity with RAQ™ Coatings\u003c\/h3\u003e\n\u003cp\u003eSky-Watcher utilizes proprietary Radiant™ Aluminum Quartz™ (RAQ™) coatings on the borosilicate primary mirror, ensuring 94% of the gathered light reaches your eyepiece. The corrector lens features Metallic High-Transmission Coatings™ (MHTC™) to minimize chromatic aberration and further enhance light transmission. This combination produces brighter, more detailed views than standard coatings, especially when observing faint planetary moons or deep-sky objects where every photon counts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCompact 15\" OTA Weighing Only 9.7 lbs\u003c\/h3\u003e\n\u003cp\u003eDespite its powerful 1540mm focal length, the Skymax 127's optical tube is just 15 inches long and weighs a mere 9.7 lbs. This compact and lightweight form factor makes it an ideal grab-and-go telescope that can be mounted on lighter, more portable mounts. Its small size makes it easy to transport and set up for quick observing sessions, whether in your backyard or at a remote dark-sky site.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall Secondary Obstruction:\u003c\/strong\u003e With a secondary mirror obstruction of only 31% by diameter (9% by area), the optical path is less impeded than in many other compound telescopes, preserving image contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eV-Style Dovetail:\u003c\/strong\u003e The included V-style dovetail bar ensures compatibility with a wide range of popular astronomical mounts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Inch Accessories:\u003c\/strong\u003e The package includes a 2-inch star diagonal and a 28mm LET eyepiece, providing a wide 55x magnification field of view right out of the box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSkymax 127 vs. Schmidt-Cassegrain Designs\u003c\/h3\u003e\n\u003cp\u003eThe Maksutov-Cassegrain optical design is often chosen for its ability to produce sharper, higher-contrast images compared to a similarly sized Schmidt-Cassegrain (SCT). The trade-off is typically a longer cool-down time and a narrower field of view.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharper Views:\u003c\/strong\u003e The Skymax 127's thick corrector lens and smaller secondary obstruction (31%) contribute to pinpoint star images and enhanced contrast, which is especially beneficial for planetary observation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLonger Focal Ratio:\u003c\/strong\u003e The native f\/12.1 focal ratio provides higher magnification with any given eyepiece compared to a standard f\/10 SCT.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollimation Stability:\u003c\/strong\u003e Maksutov-Cassegrains are known for holding collimation extremely well, requiring less frequent adjustment than SCTs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Sky-Watcher Skymax 127 perform on Jupiter with its 1540mm focal length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Skymax 127 is an excellent choice for observing Jupiter. Its 1540mm focal length and f\/12.1 ratio provide high native magnification, allowing you to easily resolve the main equatorial belts, the Great Red Spot (when visible), and the four Galilean moons. The high-contrast optics will make subtle cloud features and transit shadows stand out clearly under steady seeing conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Skymax 127 suitable for a portable setup for observing from a city balcony?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. Weighing only 9.7 lbs with a 15-inch tube length, the Skymax 127 is highly portable and easy to manage on a balcony. Its Maksutov design is excellent at cutting through light pollution to deliver sharp, contrasty views of bright objects like the Moon, planets, and double stars, which are the primary targets in an urban environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the Skymax 127's Maksutov-Cassegrain design?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Maksutov-Cassegrain design uses a spherical primary mirror and a thick meniscus corrector lens. This combination is easier to manufacture to a high degree of precision, resulting in sharp, high-contrast images often compared to apochromatic refractors. It also features a small secondary obstruction (31% on the Skymax 127), which further enhances contrast compared to many other catadioptric designs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the Sky-Watcher Skymax 127?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an OTA weight of only 9.7 lbs, the Skymax 127 is very versatile. It can be used on a light-duty computerized GoTo mount like a Sky-Watcher AZ-GTi, a medium alt-azimuth mount for grab-and-go visual, or a stable equatorial mount like the Sky-Watcher HEQ5-R for more serious observation or planetary imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the included 2-inch 28mm LET eyepiece offer for the Skymax 127?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe included 28mm eyepiece provides a magnification of 55x. This is a great low-power eyepiece for this telescope, perfect for locating objects, observing the full lunar disc, or viewing larger open star clusters like the Pleiades (M45).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Skymax 127 for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Skymax 127 is an excellent telescope for high-magnification imaging of the Moon and planets. Its long f\/12.1 focal ratio is ideal for capturing fine detail on these targets with a dedicated planetary camera. However, its slow focal ratio makes it less suitable for deep-sky imaging of faint nebulae and galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture\u003c\/td\u003e\n\u003ctd\u003e127mm (5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1540mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/12.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant™ Aluminum Quartz™ (RAQ™) with 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBK7\/Borosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Diameter\u003c\/td\u003e\n\u003ctd\u003e39mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e31%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by area)\u003c\/td\u003e\n\u003ctd\u003e9%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e0.91 arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e1.1 arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e250x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e18x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering\u003c\/td\u003e\n\u003ctd\u003e55% more than 102mm model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003ePrimary Mirror Movement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e15\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e5.75\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e9.7 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinder Scope\u003c\/td\u003e\n\u003ctd\u003e6x30 Finder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagonal\u003c\/td\u003e\n\u003ctd\u003e2\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eV-Style Dovetail Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e28mm LET (2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification (with included eyepiece)\u003c\/td\u003e\n\u003ctd\u003e55x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234115209\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSkymax 127 OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e28mm LET 2\" Eyepiece\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Star Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e6x30 Finderscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eV-Style Dovetail Rail\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/sky-watcher-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSky-Watcher 2-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44967190561053,"sku":"SW-S11520","price":850.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher-Skymax-127-S11520-1__09357.1594170770.1280.1280.jpg?v=1684338456"},{"product_id":"sky-watcher-skymax-150","title":"Sky-Watcher Skymax 150","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e151mm Maksutov-Cassegrain Optical Design\u003c\/li\u003e\n\u003cli\u003e1800mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/12 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e94% Reflectivity Radiant Aluminum Quartz (RAQ)™ Coatings\u003c\/li\u003e\n\u003cli\u003e31% Secondary Obstruction by Diameter\u003c\/li\u003e\n\u003cli\u003e14 lb. Optical Tube Weight\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSky-Watcher Skymax 150 Maksutov-Cassegrain Telescope\u003c\/h2\u003e\n\u003cp\u003eThe Sky-Watcher Skymax 150 delivers high-contrast planetary and lunar views through its 151mm Maksutov-Cassegrain optical system. Its 1800mm focal length and f\/12 focal ratio produce high-magnification images, resolving detail down to the 0.77 arc-second Dawes limit. The optical tube weighs just 14 lbs, making it a portable instrument for serious visual observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e1800mm Focal Length for High-Power Observation\u003c\/h3\u003e\n\u003cp\u003eThe Skymax 150's long 1800mm focal length is engineered for detailed views of solar system objects. This design naturally produces higher magnification with any given eyepiece compared to standard Newtonians or refractors, allowing you to easily resolve features like Jupiter's cloud bands, Saturn's Cassini Division, and the subtle crater chains on the Moon without requiring complex Barlow lens setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e31% Secondary Obstruction for Enhanced Contrast\u003c\/h3\u003e\n\u003cp\u003eA key advantage of the Maksutov design is its small secondary mirror. The Skymax 150 features a 47mm secondary, resulting in a central obstruction of only 31% by diameter. This minimizes diffraction effects and boosts image contrast, producing the sharp, refractor-like views that make Maksutov-Cassegrains the preferred instrument for planetary observers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e94% Reflectivity RAQ™ Mirror Coatings\u003c\/h3\u003e\n\u003cp\u003eThe primary mirror is coated with Sky-Watcher's Radiant™ Aluminum Quartz (RAQ™) coatings, achieving 94% reflectivity for brighter images. Combined with fully multi-coated corrector lens optics, the system maximizes light transmission to ensure faint planetary details and subtle deep-sky structures are not lost. The result is a brighter, more detailed image at the eyepiece.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBorosilicate Primary Mirror:\u003c\/strong\u003e Provides thermal stability, reducing the time needed for the telescope to acclimate to ambient temperatures for sharp, stable views.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Mirror Focuser:\u003c\/strong\u003e Moving the primary mirror to focus eliminates the image shift common with external Crayford focusers, especially when using heavier 2\" accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded 28mm LET Eyepiece:\u003c\/strong\u003e The supplied 2-inch eyepiece yields a magnification of 64.3x, perfect for locating objects and enjoying wide-field views before increasing power.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSkymax 150 vs. a 6\" Schmidt-Cassegrain\u003c\/h3\u003e\n\u003cp\u003eWhile both designs are compact, the Skymax 150 Maksutov-Cassegrain holds a distinct advantage for planetary viewing. A comparable 6-inch SCT often has a larger secondary obstruction, which slightly reduces contrast. The Maksutov's optical design inherently produces sharper, higher-contrast views, making it a specialist for resolving fine detail on bright objects. However, the trade-off is a slower f\/12 focal ratio, which means the Skymax is less suited for wide-field, deep-sky astrophotography compared to a faster f\/10 SCT.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Sky-Watcher Skymax 150 perform on Jupiter with its 1800mm focal length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Skymax 150's 1800mm focal length makes it an exceptional instrument for observing Jupiter. This long focal length allows you to easily achieve the high magnifications (over 200x with the right eyepiece) needed to resolve the planet's main atmospheric features. You can expect to clearly see the primary equatorial belts, distinguish color variations, and spot the Great Red Spot when it is visible. The high-contrast optics will also help in resolving the four Galilean moons as distinct disks during transits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Skymax 150 a good choice for observing globular clusters like M13?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Skymax 150 is a great telescope for globular clusters. Its 151mm aperture gathers enough light to resolve the dense cores of bright clusters like the Hercules Cluster (M13) into individual stars. The f\/12 focal ratio provides a dark sky background that makes the cluster stand out, and at high power, you can begin to see the \"star dust\" effect across the entire object.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the Sky-Watcher Skymax 150?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an optical tube weight of 14 lbs, the Skymax 150 is manageable for a wide range of mounts. For visual use, a sturdy alt-azimuth mount like the Sky-Watcher AZ5 or a computerized AZ-GTi would be sufficient. For astrophotography, a robust German equatorial mount with a payload capacity of at least 20-25 lbs, such as a Sky-Watcher HEQ5-R or EQ6-R, is recommended to handle the telescope and additional imaging gear while maintaining tracking accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Skymax 150 for deep-sky astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile possible, the Skymax 150 is not optimized for deep-sky imaging. Its long f\/12 focal ratio requires much longer exposure times to capture faint nebulae and galaxies compared to faster instruments like a Newtonian or refractor. It excels at planetary, lunar, and solar imaging where its long focal length is a significant advantage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the 31% secondary obstruction on the Skymax 150?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe small 31% central obstruction is a primary reason for the Skymax 150's high-contrast views. A smaller secondary mirror blocks less of the incoming light path, which reduces diffraction and improves the transfer of fine detail. This results in sharper images with darker sky backgrounds, which is especially noticeable when observing the Moon and planets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Skymax 150 come with everything I need to start observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Skymax 150 optical tube assembly includes several key accessories to get you started. It comes with a 9x50 finderscope for locating objects, a 2-inch star diagonal for comfortable viewing, and a 2-inch 28mm LET eyepiece that provides a 64.3x magnification. You will still need to provide a compatible mount and tripod to use the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrue Aperture\u003c\/td\u003e\n\u003ctd\u003e151 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1800 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture\u003c\/td\u003e\n\u003ctd\u003e166 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ)™ with 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBK7\/Borosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e31%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by area)\u003c\/td\u003e\n\u003ctd\u003e10%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Diameter\u003c\/td\u003e\n\u003ctd\u003e47 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e0.77 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e0.93 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e13.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e295x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e21x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003ePrimary Mirror Adjustment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e14 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e17.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e7.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e28mm LET (2-inch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification (with included eyepiece)\u003c\/td\u003e\n\u003ctd\u003e64.3x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Finder\u003c\/td\u003e\n\u003ctd\u003e9x50 Optical Finder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Diagonal\u003c\/td\u003e\n\u003ctd\u003e2\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Dovetail\u003c\/td\u003e\n\u003ctd\u003eV-style Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234115308\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSkymax 150 Maksutov-Cassegrain OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9x50 Finderscope with Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Star Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e28mm LET Eyepiece (2\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eV-style Dovetail Rail\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/sky-watcher-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSky-Watcher 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44967190593821,"sku":"SW-S11530","price":1360.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher-Skymax-150-S11530-1__52671.1594170772.1280.1280.jpg?v=1684338469"},{"product_id":"sky-watcher-skymax-180","title":"Sky-Watcher Skymax 180","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e182mm (7.1-inch) Maksutov-Cassegrain Optical Tube\u003c\/li\u003e\n\u003cli\u003e2700mm Focal Length at f\/15\u003c\/li\u003e\n\u003cli\u003e5% Secondary Obstruction by Area for High Contrast\u003c\/li\u003e\n\u003cli\u003eRadiant™ Aluminum Quartz™ (RAQ™) Coatings with 94% Reflectivity\u003c\/li\u003e\n\u003cli\u003eWeighs 19 lbs with Accessories\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSky-Watcher Skymax 180 Maksutov-Cassegrain Telescope\u003c\/h2\u003e\n\u003cp\u003eThe Sky-Watcher Skymax 180 delivers high-magnification planetary and lunar views with its 182mm aperture and 2700mm focal length. Its f\/15 focal ratio and minimal 5% central obstruction by area produce exceptionally high-contrast images, resolving details down to the 0.64 arcsecond Dawes limit. The optical system uses Radiant Aluminum Quartz (RAQ) mirror coatings to achieve 94% reflectivity, ensuring bright images even at the 354x maximum magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e2700mm Focal Length in a 22\" Tube\u003c\/h3\u003e\n\u003cp\u003eThe Maksutov-Cassegrain design concentrates a powerful 2700mm focal length into a compact optical tube that is just 22 inches long and weighs only 19 pounds. This combination makes the Skymax 180 an ideal high-magnification instrument for observers with limited space or smaller equatorial mounts that cannot handle a long refractor or large Newtonian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHigh-Contrast Views with a 5% Central Obstruction\u003c\/h3\u003e\n\u003cp\u003eA key advantage of the Skymax 180 is its small secondary mirror, which obstructs only 5% of the aperture area. This minimizes diffraction effects compared to other catadioptric designs, resulting in sharper, higher-contrast images. You will notice finer detail in Jupiter's cloud bands, subtler texture in Saturn's rings, and a darker sky background when observing faint planetary nebulae.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperior Planetary Detail:\u003c\/strong\u003e The long f\/15 focal ratio is optimized for high-power observation, easily revealing features like the Cassini Division in Saturn's rings or the polar ice caps on Mars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharp, Aberration-Free Field:\u003c\/strong\u003e The Maksutov corrector lens and spherical primary mirror create a well-corrected image field, free from the chromatic aberration common in refractors and the coma found in fast Newtonians.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eBright Images from 94% Reflectivity RAQ Coatings\u003c\/h3\u003e\n\u003cp\u003eSky-Watcher applies its proprietary Radiant™ Aluminum Quartz™ (RAQ™) coatings to the Skymax 180's mirrors, achieving 94% reflectivity for brighter, more detailed views. The front corrector lens is fully multi-coated to maximize light transmission and prevent internal reflections, ensuring the image reaching your eyepiece is as bright and crisp as possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSkymax 180 vs. a Standard 8\" SCT\u003c\/h3\u003e\n\u003cp\u003eThe Skymax 180 is often compared to 8-inch Schmidt-Cassegrain telescopes (SCTs). While an 8\" SCT has a slight edge in light-gathering power, the Skymax 180 typically delivers higher contrast for planetary viewing.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSCT Advantage:\u003c\/strong\u003e An 8-inch (203mm) SCT gathers about 25% more light than the 182mm Skymax, making it better suited for observing fainter deep-sky objects. It also typically has a shorter focal length (around 2000mm), providing a wider true field of view.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkymax 180 Advantage:\u003c\/strong\u003e The Skymax's smaller secondary obstruction (5% by area vs. ~10-12% for a typical SCT) and longer native focal length (2700mm) produce a higher-contrast image, which is a significant advantage for resolving fine planetary and lunar detail. It also requires less frequent collimation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Sky-Watcher Skymax 180?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an optical tube weight of 19 lbs, the Skymax 180 works well on mid-sized equatorial mounts in the HEQ5 or EQ6-R class. These mounts provide the stability needed for high-magnification visual observing and planetary imaging without excessive vibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Skymax 180 perform on Jupiter at high magnification?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Skymax 180's long 2700mm focal length and high-contrast optics make it an exceptional instrument for observing Jupiter. On nights of steady seeing, you can push the magnification past 250x to clearly resolve the Great Red Spot, intricate details in the North and South Equatorial Belts, and the shadows of the Galilean moons as they transit the planet's disk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Skymax 180 good for deep-sky astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Skymax 180 is not ideal for imaging large deep-sky objects like nebulae or galaxies. Its slow f\/15 focal ratio would require very long sub-exposures. It excels at planetary, lunar, and solar (with a proper filter) imaging, where its long focal length is a major advantage for achieving high image scale.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does focusing move the primary mirror?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Skymax 180 uses a primary mirror focusing mechanism, common in Maksutov and Schmidt-Cassegrain telescopes. Turning the knob moves the main mirror forward and back along a baffle tube to change the focal point. This design allows for a large range of focus travel to accommodate various diagonals, eyepieces, and cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Skymax 180 need to be collimated often?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, a major advantage of the Maksutov-Cassegrain design is its robust collimation stability. Unlike Schmidt-Cassegrains or Newtonians, the Skymax 180 rarely needs collimation. Its optics are fixed in a sealed tube, making it a very low-maintenance telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 1.25\" eyepieces with the included 2\" diagonal?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The included 2\" star diagonal comes with a 1.25\" adapter. This allows you to use both 2\" eyepieces, like the included 28mm LET for wide-field views, and standard 1.25\" eyepieces for higher magnifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrue Aperture\u003c\/td\u003e\n\u003ctd\u003e182 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture\u003c\/td\u003e\n\u003ctd\u003e199 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2700 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ)™ with 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBK7 \/ Borosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Diameter\u003c\/td\u003e\n\u003ctd\u003e41 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e23%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by area)\u003c\/td\u003e\n\u003ctd\u003e5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e0.64 arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e0.78 arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e13.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e26x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e354x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering (vs. next size down)\u003c\/td\u003e\n\u003ctd\u003e44%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003ePrimary Mirror\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e22\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e8.625\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e19 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinder Scope\u003c\/td\u003e\n\u003ctd\u003e9x50 Finder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagonal\u003c\/td\u003e\n\u003ctd\u003e2\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eV-style Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepiece\u003c\/td\u003e\n\u003ctd\u003e28mm LET (2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification (with included eyepiece)\u003c\/td\u003e\n\u003ctd\u003e96.4x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234115407\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSkymax 180 Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e9x50 Finderscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Star Diagonal with 1.25\" Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e28mm LET Eyepiece (2\")\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eV-style Dovetail Bar\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher_Newtonian_Dobsonian_Collimation_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.skywatcherusa.com\/pages\/firmware-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/sky-watcher-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSky-Watcher 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44967190659357,"sku":"SW-S11540","price":2330.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher-Skymax-180-S11540-1__02494.1594170773.1280.1280.jpg?v=1684338481"},{"product_id":"sky-watcher-starlux-190mn","title":"Sky-Watcher Starlux 190MN","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e190mm Maksutov-Newtonian Optical Design\u003c\/li\u003e\n\u003cli\u003e1000mm Focal Length\u003c\/li\u003e\n\u003cli\u003eFast f\/5.3 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eRadiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity\u003c\/li\u003e\n\u003cli\u003e2\" Dual-Speed Crayford Focuser\u003c\/li\u003e\n\u003cli\u003eWeighs 29 lbs with accessories\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSky-Watcher Starlux 190MN Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Sky-Watcher Starlux 190MN delivers apochromatic-level performance in a high-throughput design, combining a 203mm primary mirror, a 1000mm focal length, and a fast f\/5.3 focal ratio. Its integrated Maksutov corrector lens eliminates the need for additional flatteners, providing pinpoint stars across a wide, flat field, while the Radiant Aluminum Quartz (RAQ)™ mirror coatings ensure 94% reflectivity for maximum brightness on faint deep-sky targets. With a secondary obstruction of just 34% by diameter, the Starlux 190MN maintains the high-contrast views critical for resolving fine planetary and nebular detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ef\/5.3 Maksutov-Newtonian Optical System\u003c\/h3\u003e\n\u003cp\u003eThe Starlux 190MN's optical design provides a coma-free, flat field without requiring external corrective optics. The front meniscus corrector corrects for spherical aberration from the 203mm primary mirror, delivering sharp stars edge-to-edge, a capability essential for modern large-format sensors. This integrated correction makes it an ideal instrument for astrophotographers seeking refractor-like performance at a fraction of the cost.\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eInherent Flat Field:\u003c\/strong\u003e The Maksutov corrector design eliminates the need for a separate field flattener, simplifying your imaging train and reducing potential flexure points.\n \u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eHigh-Contrast Views:\u003c\/strong\u003e The 34% central obstruction is optimized for deep-sky imaging, providing bright, detailed images while still offering excellent performance for visual observation of planets and the Moon.\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e94% Reflectivity RAQ™ and Fully Multi-Coated Optics\u003c\/h3\u003e\n\u003cp\u003eEvery optical surface is optimized for maximum light transmission to preserve the faintest details. The borosilicate primary mirror features Sky-Watcher's exclusive Radiant Aluminum Quartz (RAQ)™ coatings, which achieve 94% reflectivity for brighter images. The BK7 corrector lens is fully multi-coated to suppress reflections and maximize contrast, ensuring the final image is free of ghosting and internal scatter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready at 29 lbs\u003c\/h3\u003e\n\u003cp\u003eThe Starlux 190MN is built for stable, precise imaging sessions. The robust 2\" dual-speed Crayford focuser provides smooth, exact focus adjustments without image shift, critical for achieving sharp results at the f\/5.3 focal ratio. The optical tube assembly weighs 29 lbs and measures 37.5 inches long, requiring a stable German equatorial mount in the EQ6 class or higher to carry it with the necessary rigidity for long-exposure astrophotography.\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003e2\" Dual-Speed Focuser:\u003c\/strong\u003e Offers a 10:1 reduction ratio for fine-tuning focus, essential for both visual and photographic applications.\n \u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Comes ready to mount with a V-style dovetail bar, tube rings, and an 8x50 right-angle correct-image (RACI) finderscope for comfortable object location.\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Starlux 190MN?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an OTA weight of 29 lbs, the Starlux 190MN requires a robust German equatorial mount with a payload capacity of at least 40-45 lbs for astrophotography. Mounts like the Sky-Watcher EQ6-R Pro or similar are recommended to ensure stability and precise tracking for long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Starlux 190MN's 34% central obstruction affect planetary imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA 34% obstruction is a moderate value that represents a trade-off between maximizing light-gathering for deep-sky objects and preserving the highest contrast for planetary detail. While a pure planetary scope might have a smaller obstruction, the Starlux 190MN still delivers excellent, high-resolution views of Jupiter's cloud bands and Saturn's rings, making it a highly capable all-around instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a coma corrector or field flattener with the Starlux 190MN?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Maksutov-Newtonian design has inherent correction for both coma and field curvature. The front meniscus lens corrects for aberrations before the light reaches the primary mirror, delivering a flat, sharp field of view without the need for additional corrective optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the 8x50 RACI finder included with the Starlux 190MN?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe included \u003cstrong\u003e8x50 Right-Angle Correct-Image (RACI)\u003c\/strong\u003e finderscope offers two main benefits. The right-angle design allows for more comfortable viewing when the telescope is pointed high in the sky, and the correct-image orientation means star patterns are not reversed, making it much more intuitive to navigate from a star chart to the eyepiece view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Starlux 190MN perform on a large target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Starlux 190MN's 1000mm focal length and f\/5.3 speed are an excellent match for large galaxies like Andromeda (M31). It provides a wide enough field to capture the full extent of the galaxy with a full-frame or APS-C sensor, while the large 203mm aperture gathers enough light to resolve its dust lanes, star-forming regions, and satellite galaxies M32 and M110 in a single frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"apochromatic performance\" mean for the Starlux 190MN?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eApochromatic (APO) performance means the optical system corrects for chromatic aberration, or false color. In this all-reflective design, light is focused by mirrors, not lenses, which completely eliminates color fringing. This ensures that stars are pure white and planetary details have true-to-life color, similar to the performance of a high-end APO refractor but at a much larger aperture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Newtonian\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture\u003c\/td\u003e\n\u003ctd\u003e203mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1000mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ)™ with 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBK7\/Borosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Diameter\u003c\/td\u003e\n\u003ctd\u003e64mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e34%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by area)\u003c\/td\u003e\n\u003ctd\u003e11%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e0.61 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e0.74 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e13.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e27x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e374x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering (vs. 6\")\u003c\/td\u003e\n\u003ctd\u003e11% more\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" Dual Speed Crayford\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e37.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e9.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e29 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234115506\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eStarlux 190MN OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e8x50 Right-Angle Correct-Image Finderscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 set\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eV-Style Dovetail Bar\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher_Newtonian_Dobsonian_Collimation_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Collimation Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/sky-watcher-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSky-Watcher 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44967190692125,"sku":"SW-S11550","price":3300.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Sky-Watcher-Starlux-190MN-S11550-1__39663.1594170774.1280.1280.jpg?v=1684338426"},{"product_id":"explore-scientific-firstlight-127mm-mak-cassegrain","title":"Explore Scientific FirstLight 127mm Mak-Cassegrain","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e127mm (5\") Maksutov-Cassegrain Optical Tube\u003c\/li\u003e\n\u003cli\u003e1900mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/15 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eIncludes 25mm Plössl Eyepiece \u0026amp; 1.25\" Diagonal\u003c\/li\u003e\n\u003cli\u003eSmartphone Adapter for Basic Astrophotography\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific FirstLight 127mm Mak-Cassegrain Telescope\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific FirstLight 127mm Mak-Cassegrain delivers high-power planetary and lunar views through its long 1900mm focal length and high-contrast f\/15 optical system. This 127mm aperture Maksutov design comes with a 25mm Plössl eyepiece and a 1.25\" 90° diagonal for immediate observation of the night sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 127mm f\/15 Maksutov-Cassegrain Optical System\u003c\/h3\u003e\n\u003cp\u003eThe Maksutov-Cassegrain design is renowned for producing sharp, refractor-like images in a compact package. With a 127mm aperture, this telescope gathers enough light for detailed views of Jupiter's cloud bands, Saturn's rings, and countless lunar craters. The slow f\/15 focal ratio darkens the sky background, significantly increasing contrast on bright objects and making it easier to split tight double stars.\u003c\/p\u003e\n\u003cp\u003eFully multi-coated optics ensure that the maximum amount of light reaches the included 25mm Plössl eyepiece. This combination of a long 1900mm focal length and a sealed optical tube minimizes air currents and requires virtually no maintenance, delivering consistently crisp views every time you observe.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCompact Form, 1900mm Reach: A \"Grab-and-Go\" Design\u003c\/h3\u003e\n\u003cp\u003eDespite its powerful 1900mm focal length, the FirstLight 127mm Mak features a remarkably short and portable optical tube. This makes it an ideal \"grab-and-go\" instrument for quick backyard sessions or for travel to dark-sky sites without sacrificing optical power.\u003c\/p\u003e\n\u003cp\u003eThe primary trade-off for this high-magnification design is a narrow field of view. While not suited for sweeping views of the largest nebulae like the North American Nebula (NGC 7000), it excels at framing smaller, brighter targets like the Ring Nebula (M57) or the Hercules Cluster (M13) against a dark sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eReady for Viewing with a 25mm Plössl and Smartphone Adapter\u003c\/h3\u003e\n\u003cp\u003eThis package includes everything you need to start observing as soon as you mount the telescope. The 25mm Plössl eyepiece is a solid general-purpose choice, while the 1.25\" 90° star diagonal provides comfortable viewing angles for objects high in the sky. Locating targets is simplified with the included red-dot finder.\u003c\/p\u003e\n\u003cp\u003eFor those looking to share their discoveries, the included smartphone adapter allows you to quickly capture images of the Moon and bright planets through the eyepiece. It's a straightforward way to begin your journey into basic astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFirstLight 127mm Mak vs. a 5\" Schmidt-Cassegrain: Planetary Focus\u003c\/h3\u003e\n\u003cp\u003eCompared to a standard 5-inch Schmidt-Cassegrain (SCT), which typically has an f\/10 focal ratio and a 1250mm focal length, the FirstLight 127mm Mak is a more specialized instrument.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSCT Advantage:\u003c\/strong\u003e An f\/10 SCT offers a wider true field of view with the same eyepiece, making it slightly more versatile for observing larger star clusters and brighter deep-sky objects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirstLight 127mm Mak Advantage:\u003c\/strong\u003e The Mak's longer 1900mm focal length achieves significantly higher magnification with any given eyepiece, a distinct benefit for planetary observation. The design's smaller central obstruction also tends to produce higher-contrast images, critical for resolving fine details on planetary surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the FirstLight 127mm Mak-Cassegrain?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou will need a sturdy astronomical mount with a Vixen-style dovetail saddle. For visual use, a manual alt-azimuth mount like an Explore Scientific Twilight I or a small computerized GoTo mount like a Celestron NexStar SLT would be an excellent choice for the FirstLight 127mm Mak.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the f\/15 focal ratio of the FirstLight 127mm Mak affect viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003ef\/15 focal ratio\u003c\/strong\u003e is considered \"slow,\" which has several key advantages for planetary and lunar viewing. It provides high magnification with standard eyepieces, increases image contrast by darkening the sky background, and is very forgiving of less-expensive eyepiece designs. The main trade-off is a narrower field of view compared to \"faster\" telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I do astrophotography with the Explore Scientific FirstLight 127mm Mak?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for basic imaging. The included smartphone adapter is perfect for taking snapshots of the Moon and bright planets like Jupiter and Saturn. For more serious deep-sky imaging, the f\/15 focal ratio would require very long exposures, making a different type of telescope a better choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the FirstLight 127mm Mak good for deep-sky objects like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile you can certainly see bright deep-sky objects, the FirstLight 127mm Mak's long focal length and narrow field of view are not ideal for very large targets like the Orion Nebula (M42) or the Andromeda Galaxy (M31). It is better suited for smaller, concentrated targets like globular clusters (e.g., M13) and planetary nebulae (e.g., M57).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the maximum useful magnification for the FirstLight 127mm Mak on a target like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA general rule for maximum useful magnification is 50x per inch of aperture (or 2x per millimeter). For the \u003cstrong\u003e127mm\u003c\/strong\u003e FirstLight Mak, this is approximately 254x. On nights of excellent atmospheric seeing, you could push the magnification to this level to see fine details in Jupiter's cloud belts, though on average nights, 150x to 200x will provide a more consistently sharp view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the included smartphone adapter with the FirstLight 127mm Mak?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFirst, insert an eyepiece (like the included \u003cstrong\u003e25mm Plössl\u003c\/strong\u003e) into the diagonal and bring an object into sharp focus. Then, clamp your smartphone into the adapter, aligning its camera lens with the center of the eyepiece. Attach the adapter to the eyepiece, turn on your phone's camera app, and you should see the object on your screen, ready to be photographed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e127mm (5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1900mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Included\u003c\/td\u003e\n\u003ctd\u003e25mm Plössl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagonal Included\u003c\/td\u003e\n\u003ctd\u003e1.25\" 90° Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinder Included\u003c\/td\u003e\n\u003ctd\u003eRed-Dot Finder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e811803033443\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFirstLight 127mm Maksutov-Cassegrain OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e25mm Plössl Eyepiece\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" 90° Star Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eRed-Dot Finder\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSmartphone Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNo manual or software is available for this product.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967203602717,"sku":"ES-FL-MC1271900","price":699.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-FirstLight-127mm-Mak-Cassegrain-FL-MC1271900-1__24116.1594240369.1280.1280.jpg?v=1684338949"},{"product_id":"explore-scientific-ar127-doublet-refractor","title":"Explore Scientific AR127 Doublet Refractor","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e127mm Achromatic Doublet Refractor\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Crown-and-Flint Optics\u003c\/li\u003e\n\u003cli\u003eDual-Speed Focuser for Fine Adjustment\u003c\/li\u003e\n\u003cli\u003eDielectric-Coated Diagonal Included\u003c\/li\u003e\n\u003cli\u003eCradle Ring Assembly with Vixen-Style Dovetail\u003c\/li\u003e\n\u003cli\u003e8x50 Straight-Through Finderscope\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific AR127 Doublet Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific AR127 refractor uses a classic 127mm air-spaced, crown-and-flint doublet objective to deliver high-contrast, sharp images of celestial objects at a fraction of the cost of a true apochromatic design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe AR127's 127mm Air-Spaced Doublet Lens\u003c\/h3\u003e\n\u003cp\u003eThis telescope's optical heart is its 127mm (5-inch) achromatic objective lens. The air-spaced doublet design, using traditional crown and flint glasses, provides sharp, detailed views of the Moon, planets, and deep-sky objects. It gathers significantly more light than smaller refractors, resolving details like Jupiter's cloud bands and the Cassini Division in Saturn's rings.\u003c\/p\u003e\n\u003cp\u003eAs an achromatic refractor, its primary strength is exceptional contrast for its aperture class. However, a degree of chromatic aberration, or false color, is inherent to the design and will be visible as a slight violet halo around the brightest stars and planetary limbs. This is a well-understood trade-off for achieving this level of aperture and portability at this price point.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eBuilt for Outreach: Heavy-Duty Focuser and Mounting\u003c\/h3\u003e\n\u003cp\u003eDesigned to withstand the rigors of frequent transport and use at star parties, the AR127 is equipped with robust, professional-grade components. The OTA includes a smooth, dual-speed focuser, allowing for both coarse and fine focus adjustments critical for achieving sharp images at high magnification. A high-reflectivity 2-inch dielectric diagonal is included to ensure maximum light transmission to the eyepiece.\u003c\/p\u003e\n\u003cp\u003eThe package is completed with a sturdy cradle ring assembly that attaches to a Vixen-style dovetail bar, making it compatible with a wide range of popular German equatorial and alt-azimuth mounts. An 8x50 straight-through finderscope with a quick-release bracket is also included to help you locate and center objects in the main eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of views can I expect from the AR127 on the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its 127mm aperture, the AR127 will provide bright, detailed views of the Orion Nebula (M42). You can expect to resolve the four main stars of the Trapezium at the nebula's core and see extensive nebulosity stretching across the field of view, especially from a dark-sky site. The fast f\/6.5 focal ratio makes it well-suited for framing large deep-sky objects like this.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the AR127's achromatic design handle bright objects like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AR127 will show significant detail on Jupiter, including its main equatorial belts, zones, and the Great Red Spot. However, because it is an achromatic refractor, you will notice a faint purple or violet halo around the planet's limb. This is known as chromatic aberration and is a normal characteristic of this optical design. Using a light yellow or a specialized fringe-killer filter can help reduce this effect and improve contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Explore Scientific AR127 suitable for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the AR127 can be used for astrophotography, particularly for lunar and planetary imaging where its sharpness is an asset. For deep-sky imaging, the inherent chromatic aberration will cause stars to appear bloated with colored halos. This can be managed with specialized filters and processing techniques, but for serious deep-sky work, an apochromatic (APO) refractor is generally recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat type of mount is recommended for the AR127 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA sturdy German equatorial mount like the Explore Scientific iEXOS-100, Celestron Advanced VX, or Sky-Watcher EQM-35 is a good match for visual use and light imaging with the AR127. For more serious astrophotography, a mount with a higher payload capacity is recommended to handle the telescope and additional camera gear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the AR127's dual-speed focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe dual-speed focuser provides two focusing knobs. The larger knob allows for rapid, coarse adjustments to quickly find the general focus point. The smaller knob offers a fine-adjustment ratio (typically 10:1), enabling you to make very small, precise changes to achieve critical sharpness, which is especially important for high-magnification planetary viewing and astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I get optical test data for my specific AR127 telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Explore Scientific offers interferometric optical data for your specific telescope upon request. You must own the telescope for at least 120 days before contacting their customer service to request the report for your serial number.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257010974\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967204684061,"sku":"ES-DAR127065-02","price":1049.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-AR127-Air-Spaced-Doublet-Refractor-Telescope-DAR127065-01-DAR127065-01-1__42087.1594240382.1280.1280.jpg?v=1684338987"},{"product_id":"explore-scientific-ar152-doublet-refractor","title":"Explore Scientific AR152 Doublet Refractor","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e152mm (6-inch) Aperture\u003c\/li\u003e\n\u003cli\u003ef\/6.5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Doublet Achromatic Optics\u003c\/li\u003e\n\u003cli\u003e2\" Dual-Speed Focuser\u003c\/li\u003e\n\u003cli\u003e2\" Diagonal with 99% Dielectric Coatings\u003c\/li\u003e\n\u003cli\u003e8x50 Straight-Through Finderscope\u003c\/li\u003e\n\u003cli\u003eVixen-Style Dovetail\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific AR152 Doublet Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific AR152 Doublet Refractor combines a large 152mm (6-inch) aperture with a fast f\/6.5 focal ratio for bright, wide-field views of deep-sky objects. Its air-spaced, diffraction-limited optics are paired with a robust 2-inch dual-speed focuser, a 99% reflective 2-inch dielectric diagonal, and an 8x50 finder scope, delivering a complete optical tube assembly ready for your mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e152mm f\/6.5 Optics: Bright, Wide-Field Achromatic Views\u003c\/h3\u003e\n\u003cp\u003eWith a 152mm objective, this refractor gathers a significant amount of light, revealing faint details in galaxies and bringing out the structure in nebulae like the Orion Nebula (M42). The f\/6.5 focal ratio creates a wide true field of view, making it easy to frame large star clusters and sweeping portions of the Milky Way. The classic crown-and-flint doublet design offers sharp, high-contrast images at an unmatched value.\u003c\/p\u003e\n\u003cp\u003eAs an achromatic refractor, the AR152 will exhibit some chromatic aberration, or \"false color,\" visible as a slight violet halo around the brightest stars and the limb of the Moon. This is an inherent trade-off for achieving such a large aperture in a refractor at this price point. For deep-sky observation, this effect is often negligible and is a small price to pay for the bright, immersive views the 6-inch objective provides.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eBuilt for Outreach: A 2\" Dual-Speed Focuser and Heavy-Duty Components\u003c\/h3\u003e\n\u003cp\u003eEngineered for durability, the AR152 is built to handle the demands of public star parties and frequent use. The optical tube is equipped with a smooth 2-inch dual-speed focuser, allowing for rapid coarse adjustments and critical fine-tuning for sharp planetary detail or astrophotography. This precision is essential for getting the most out of the telescope's high-resolution optics.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" Dielectric Diagonal:\u003c\/strong\u003e The included one-piece diagonal features 99% reflective dielectric coatings, ensuring minimal light loss for the brightest possible images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8x50 Finder Scope:\u003c\/strong\u003e The large 8x50 straight-through finderscope makes locating celestial objects simple and intuitive. It mounts to the new Hybrid 2N1 Finder Scope Base via a quick-release bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVixen-Style Dovetail:\u003c\/strong\u003e A standard Vixen-style dovetail is attached to the cradle ring, providing secure and broad compatibility with a wide range of popular alt-azimuth and equatorial mounts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAR152 vs. an ED APO: The Aperture-for-Cost Trade-Off\u003c\/h3\u003e\n\u003cp\u003eWhen considering the AR152, many observers weigh it against smaller, more expensive apochromatic (APO) refractors. The choice comes down to your primary observing targets and budget.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAPO Advantage:\u003c\/strong\u003e An ED Apochromatic refractor, such as a 127mm model, will deliver views that are virtually free of chromatic aberration. This results in textbook-perfect color correction on bright stars, planets, and the Moon, which is a significant advantage for planetary imagers and visual purists.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAR152 Advantage:\u003c\/strong\u003e The 152mm aperture of the AR152 gathers over 40% more light than a 127mm telescope. This increase in light grasp means fainter deep-sky objects will appear brighter and more detailed. For observers focused on galaxies, nebulae, and star clusters, the extra aperture is often the deciding factor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUltimately, the AR152 offers more light-gathering power and higher resolution for the dollar. If your passion is deep-sky observing and you can accept a minor amount of false color on the brightest targets, the AR152 delivers impressive views and exceptional value.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose the Explore Scientific AR152 over a smaller apochromatic refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary reason is \u003cstrong\u003eaperture\u003c\/strong\u003e. The AR152's 152mm objective collects significantly more light than smaller APOs (e.g., 102mm or 127mm), resulting in brighter images of faint deep-sky objects like galaxies and nebulae. While an APO offers superior color correction, the AR152 provides greater light-gathering power for a lower cost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is best for the Explore Scientific AR152?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AR152 is a substantial optical tube. You will need a sturdy mount with a payload capacity of at least 30-35 lbs to ensure stability, especially in windy conditions. For visual use, a robust alt-azimuth mount like an Explore Scientific Twilight II or a Sky-Watcher AZ-EQ5 would work well. For astrophotography, a German Equatorial Mount in the Celestron CGEM II or iOptron CEM40 class is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the AR152 perform on planets like Jupiter and Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AR152's 152mm aperture provides high resolution capable of showing significant planetary detail. You can expect to see Jupiter's main cloud belts, the Great Red Spot, and its four Galilean moons. On Saturn, the Cassini Division in the rings will be clearly visible, along with cloud bands on the planet itself. Due to its achromatic design, you will notice a violet fringe around the bright planetary disks, which can be reduced with a fringe-killer or minus-violet filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the chromatic aberration of the AR152 a problem for deep-sky viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor most deep-sky objects, chromatic aberration is not a significant issue. Nebulae and galaxies are diffuse and lack the hard, high-contrast edges that make false color prominent. The effect is most noticeable on bright, pinpoint stars, where you may see a soft violet halo. Most deep-sky observers find the bright, wide-field views from the 6-inch aperture to be a worthwhile trade-off.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2-inch eyepieces and filters with the AR152?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Explore Scientific AR152 comes standard with a 2-inch dual-speed focuser and a 2-inch 99% dielectric diagonal. This allows you to use 2-inch eyepieces for wide, immersive views and 2-inch filters, such as UHC or O-III filters for enhancing nebula observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I expect to see in the Orion Nebula (M42) with the AR152 from a suburban location?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFrom a suburban backyard, the AR152's 6-inch aperture will provide stunning views of the Orion Nebula (M42). You will easily resolve the four main stars of the Trapezium cluster at its core. The bright, gaseous wings of the nebula will show intricate wisps and mottling, and with a UHC filter, you can trace the faint outer loops of nebulosity much further than with a smaller telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e152mm (6 inches)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Crown-and-Flint Achromatic Doublet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics\u003c\/td\u003e\n\u003ctd\u003eDiffraction-Limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2-inch Dual-Speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagonal\u003c\/td\u003e\n\u003ctd\u003e2-inch with 99% Dielectric Coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e8x50 Straight-Through on Quick-Release Bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eCradle Ring with Vixen-Style Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257011032\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAR152 Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Dual-Speed Focuser\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Diagonal with 99% Dielectric Coatings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e8x50 Finderscope with Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCradle Ring with Vixen-Style Dovetail\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHybrid 2N1 Finder Scope Base\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Explore_Scientific_Introduction_Booklet_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967207272733,"sku":"ES-DAR152065-02","price":1189.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-AR152-Air-Spaced-Doublet-Refractor-DAR152065-01-DAR152065-01-1__14562.1594240384.1280.1280.jpg?v=1684338861"},{"product_id":"explore-scientific-ed80-fcd100-series-triplet-apo-refractor","title":"Explore Scientific ED80-FCD100 Series Triplet APO Refractor","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eApochromatic Triplet Refractor\u003c\/li\u003e\n\u003cli\u003eGenuine HOYA FCD100 ED Glass\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Optical Design\u003c\/li\u003e\n\u003cli\u003eProprietary EMD Multi-Layer Coatings\u003c\/li\u003e\n\u003cli\u003eHeavy-Duty Hexagonal Focuser\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific ED80-FCD100 Series Triplet APO Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific ED80-FCD100 Series Triplet APO Refractor uses an air-spaced triplet optical design with genuine HOYA FCD100 extra-low dispersion glass to deliver exceptional chromatic aberration correction. This design produces true-to-life color fidelity and sharp, high-contrast views of everything from fine lunar details to deep-sky objects. Its proprietary EMD multi-layer coatings further optimize light transmission for brilliant, clear images across the entire field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eApochromatic Triplet Optics with HOYA FCD100 Glass\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the ED80 is an air-spaced triplet lens assembly featuring HOYA FCD100 glass, a material with optical properties comparable to the highly-regarded Ohara FPL-53. This apochromatic design virtually eliminates chromatic aberration, preventing false color fringing around bright objects like Jupiter and bright stars. The result is a pure, high-contrast image with accurate color rendition, allowing you to see subtle planetary details and resolve tight double stars with confidence.\u003c\/p\u003e\n\u003cp\u003eTo maximize image brightness, all optical surfaces receive Explore Scientific's Enhanced Multilayer Deposition (EMD) coatings. These specialized coatings are designed to boost light transmission, ensuring that the faintest wisps of nebulosity and distant galaxies reach your eye or camera sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHeavy-Duty Hexagonal Focuser for Astrophotography\u003c\/h3\u003e\n\u003cp\u003eDesigned for the demands of imaging, the ED80-FCD100 is equipped with a rugged hexagonal focuser. This robust design provides a stable, flex-free platform for camera payloads, capable of supporting a full imaging train including a DSLR or dedicated astronomy camera, filter wheel, and off-axis guider. The focuser action is smooth and precise, allowing for critical focus adjustments necessary for high-resolution planetary and deep-sky astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Versatile Grab-and-Go or Guiding Instrument\u003c\/h3\u003e\n\u003cp\u003eThe compact and lightweight nature of the ED80-FCD100 makes it an exceptional \"grab-and-go\" telescope for quick observing sessions or travel to dark-sky sites. While its portable design is a key advantage, it doesn't sacrifice optical integrity, serving as a high-end primary instrument. This portability also makes it a superb choice as a guide scope, mounting easily alongside a larger primary telescope to provide precise guiding for long-exposure astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Explore Scientific ED80-FCD100 an \"Apochromatic\" (APO) refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn apochromatic refractor brings three wavelengths of light (red, green, and blue) to the same focal point. The \u003cstrong\u003eExplore Scientific ED80-FCD100\u003c\/strong\u003e achieves this using a three-element (triplet) lens design that incorporates a special lens made from \u003cstrong\u003eHOYA FCD100 extra-low dispersion (ED) glass\u003c\/strong\u003e. This virtually eliminates chromatic aberration, or false color, resulting in significantly sharper, higher-contrast images than standard achromatic refractors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the HOYA FCD100 glass in the ED80-FCD100 perform?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eHOYA FCD100 is a premium optical glass known for its extremely low dispersion properties, which are critical for color correction. Its performance is widely considered to be on par with Ohara's FPL-53 glass, another benchmark material for high-end apochromatic refractors. This allows the ED80-FCD100 to deliver views with true-to-life color and excellent contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the focuser on the ED80-FCD100 suitable for astrophotography with a DSLR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The telescope features a heavy-duty hexagonal focuser specifically designed to handle the weight of an astrophotography setup. It provides a rigid and stable platform that prevents sagging or flexure, even with a DSLR, filter wheel, or dedicated astronomy camera attached, ensuring your focus remains sharp throughout an imaging session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the Explore Scientific ED80-FCD100 be used for both visual observing and imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The ED80-FCD100 is designed as a versatile, high-end instrument. Its superb color correction and contrast make it a joy for visual observation of the Moon, planets, and bright deep-sky objects. At the same time, its robust focuser and clean optics make it an excellent astrophotography platform.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the ED80-FCD100 perform visually on a target like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOn the Orion Nebula (M42), the ED80-FCD100's apochromatic optics would provide a high-contrast view with pinpoint stars. The lack of chromatic aberration means the bright stars of the Trapezium cluster at the nebula's core would resolve cleanly without distracting purple halos. You could expect to see fine details and structure within the nebulosity against a dark sky background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the ED80-FCD100 as a guide scope on a larger SCT for imaging the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the ED80-FCD100 is an excellent choice for a high-quality guide scope. Its lightweight and compact design make it easy to mount on a larger instrument, like a Schmidt-Cassegrain Telescope (SCT). When paired with a guide camera, its sharp optics will provide the precise tracking necessary for long-exposure images of large targets like the Andromeda Galaxy (M31).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e8122570176076\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967207371037,"sku":"ES-FCD100-0806-02","price":1567.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-ED80-FCD100-Series-Air-Spaced-Triplet-Refractor-FCD100-0806-01-FCD100-0806-01-1__55037.1594240386.1280.1280.jpg?v=1684339015"},{"product_id":"explore-scientific-ed102-fcd100-series-triplet-apo-refractor","title":"Explore Scientific ED102-FCD100 Series Triplet APO Refractor","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e102mm Aperture\u003c\/li\u003e\n\u003cli\u003e714mm Focal Length (f\/7)\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Triplet Apochromatic Design\u003c\/li\u003e\n\u003cli\u003eGenuine HOYA FCD100 ED Glass Element\u003c\/li\u003e\n\u003cli\u003e2.5\" HEX Focuser with 10 lb Capacity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific ED102-FCD100 Series Triplet APO Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific ED102-FCD100 Series Triplet APO Refractor combines a 102mm aperture with a 714mm focal length for a versatile f\/7 optical system that excels at both wide-field imaging and high-magnification visual work. Its air-spaced triplet objective uses genuine HOYA FCD100 glass to deliver textbook color correction, while the robust 2.5\" HEX focuser supports imaging payloads up to 10 lbs on an optical tube assembly that weighs only 12 lbs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 102mm Triplet with FCD100 Glass: True Apochromatic Correction\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the ED102 is an air-spaced triplet objective featuring a genuine HOYA FCD100 extra-low dispersion (ED) glass element. This design achieves a true apochromatic level of performance, virtually eliminating the chromatic aberration (false color) that can plague simpler doublet designs. The result is a pristine, high-contrast view with pinpoint stars on a black background and no distracting purple halos around bright objects like Jupiter or Vega.\u003c\/p\u003e\n\u003cp\u003eAll optical surfaces receive Explore Scientific's proprietary EMD (Enhanced Multilayer Deposition) coatings to maximize light transmission and contrast. This ensures that the subtle coloration of planetary cloud bands and the faint, wispy details in nebulae are rendered with stunning fidelity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready Mechanics: A 2.5\" Focuser and 12 lb Portability\u003c\/h3\u003e\n\u003cp\u003eBuilt for astrophotography, the ED102 is equipped with a heavy-duty 2.5\" hexagonal rack-and-pinion focuser. This rigid design prevents flexure and slippage even when carrying a 10 lb imaging train consisting of a camera, filter wheel, and off-axis guider. The smooth, dual-speed controls allow for precise focus adjustments critical for capturing sharp stellar images.\u003c\/p\u003e\n\u003cp\u003eThe entire optical tube assembly weighs a manageable 12 lbs, making it an ideal \"grab-and-go\" instrument on a mid-sized equatorial mount. Its compact form factor also allows it to serve as a premium, large-aperture guide scope or a secondary imaging scope mounted alongside a larger instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eWhy a Triplet? The ED102-FCD100 vs. Standard ED Doublets\u003c\/h3\u003e\n\u003cp\u003eWhile a standard ED doublet refractor provides a significant step up from an achromat, it still exhibits a degree of residual false color. The Explore Scientific ED102-FCD100's third lens element, made from high-refractive-index glass, is specifically engineered to correct this remaining chromatic aberration. This provides a distinct advantage for imagers and discerning visual observers.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor Astrophotography:\u003c\/strong\u003e The triplet design produces smaller, tighter star images with no blue or violet bloat. This allows for more accurate color data acquisition and results in images with higher resolution and better overall aesthetics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor Visual Observing:\u003c\/strong\u003e On the lunar limb or the cloud tops of Jupiter, the triplet's superior color correction delivers a sharper, higher-contrast image. The absence of color fringing makes it easier to resolve fine details at high magnification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the Explore Scientific ED102-FCD100's triplet design?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eair-spaced triplet objective with HOYA FCD100 glass\u003c\/strong\u003e in the ED102-FCD100 provides a higher level of color correction than standard ED doublets. This third lens element virtually eliminates chromatic aberration, resulting in sharper stars, higher contrast, and more faithful color rendition, which is especially critical for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does HOYA FCD100 glass in the ED102 refractor compare to FPL-53?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eHOYA FCD100 is an extremely high-quality extra-low dispersion glass with optical properties comparable to Ohara's renowned FPL-53. Both are considered premier glasses for apochromatic refractors, offering exceptional correction of false color for pristine, high-contrast images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the 2.5\" HEX focuser on the ED102-FCD100 handle a full imaging train?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003e2.5\" hexagonal rack-and-pinion focuser\u003c\/strong\u003e is specifically designed for imaging. It has a stated capacity of \u003cstrong\u003e10 lbs\u003c\/strong\u003e, which is more than sufficient to support a typical setup including a cooled astronomy camera, a filter wheel, and an off-axis guider without sagging or focus shift.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is needed for the Explore Scientific ED102-FCD100?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an optical tube weight of only \u003cstrong\u003e12 lbs\u003c\/strong\u003e, the ED102-FCD100 is quite versatile. For visual use, a mount in the Celestron AVX or Sky-Watcher HEQ5 class is ideal. For serious astrophotography, stepping up to a mount with a 30-40 lb payload capacity, such as a Celestron CGEM II or Sky-Watcher EQ6-R Pro, is recommended to ensure stability and precise tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the ED102-FCD100 perform on planetary targets like Jupiter from the city?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ED102-FCD100 is an excellent planetary telescope, even from light-polluted areas. Its apochromatic optics deliver a high-contrast image, allowing you to easily resolve Jupiter's main cloud belts, the Great Red Spot, and the shadows of its Galilean moons. The \u003cstrong\u003e714mm focal length\u003c\/strong\u003e provides ample magnification with standard eyepieces or a Barlow lens.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the f\/7 focal ratio of the ED102-FCD100 good for imaging large nebulae like the Veil Nebula (NGC 6960)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe f\/7 focal ratio of the ED102 is a versatile sweet spot. It is fast enough to capture significant signal on nebulae in a reasonable time, while the \u003cstrong\u003e714mm focal length\u003c\/strong\u003e provides a field of view that can frame large targets like the Veil Nebula or the Andromeda Galaxy (M31) with most modern astronomy cameras. For even wider fields, a dedicated focal reducer can be added.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e102mm (4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e714mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Triplet Apochromat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eHOYA FCD100 ED Element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eEMD (Enhanced Multilayer Deposition)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2.5\" Dual-Speed Hexagonal Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Capacity\u003c\/td\u003e\n\u003ctd\u003e10 lbs (4.5 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e12 lbs (5.4 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257017614\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967207436573,"sku":"ES-FCD100-10207-02","price":2379.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-ED102-FCD100-Series-Air-Spaced-Triplet-Refractor-Telescope-FCD100-10207-01-FCD100-10207-01-1__31373.1594240388.1280.1280.jpg?v=1684339028"},{"product_id":"explore-scientific-ed102-fcd100-series-triplet-telescope-carbon-fiber","title":"Explore Scientific ED102-FCD100 Series Triplet Telescope - Carbon Fiber","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e102mm Aperture\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Triplet Apochromatic Optics\u003c\/li\u003e\n\u003cli\u003ePremium HOYA FCD100 ED Glass\u003c\/li\u003e\n\u003cli\u003eCarbon Fiber Optical Tube Assembly\u003c\/li\u003e\n\u003cli\u003e2.5\" Hexagonal Rack \u0026amp; Pinion Focuser\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific ED102-FCD100 Series Triplet Telescope - Carbon Fiber\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific ED102-FCD100 Carbon Fiber telescope combines a 102mm air-spaced triplet objective with premium HOYA FCD100 glass to deliver true apochromatic views, free of false color. Its lightweight carbon fiber construction and robust 2.5\" HEX focuser create a portable and exceptionally stable platform for high-resolution astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eApochromatic Triplet Optics: 102mm of FCD100 Glass\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the ED102-FCD100 is a 102mm air-spaced triplet objective. This design uses three lenses to bring all visible wavelengths to a single, sharp focus. The inclusion of a genuine HOYA FCD100 ED (Extra-low Dispersion) glass element virtually eliminates chromatic aberration, resulting in images with pinpoint stars on a black background and high-contrast details on planetary surfaces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe ED102's Carbon Fiber Advantage: Lightweight and Thermally Stable\u003c\/h3\u003e\n\u003cp\u003eThe carbon fiber tube reduces the overall weight of the optical tube assembly, making it easier to transport and compatible with a wider range of mid-sized equatorial mounts. Beyond weight savings, carbon fiber's low coefficient of thermal expansion means the telescope holds focus more reliably during long imaging sessions as ambient temperatures drop, a critical advantage for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHeavy-Duty Imaging: The 2.5\" HEX Focuser\u003c\/h3\u003e\n\u003cp\u003eTo handle modern imaging trains, the ED102-FCD100 is equipped with a rigid 2.5\" hexagonal rack-and-pinion focuser. This design prevents the flexure and image shift that can plague lesser focusers when loaded with a heavy DSLR, cooled CMOS camera, filter wheel, and off-axis guider. The result is a solid, repeatable focusing mechanism that can carry a heavy payload without compromise.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eED102 FCD100 Triplet vs. a 102mm ED Doublet: Color Correction\u003c\/h3\u003e\n\u003cp\u003eWhile a high-quality ED doublet refractor is a capable instrument, it is often more affordable and lighter than a triplet. However, the ED102-FCD100's triplet design provides a superior level of color correction. The third lens element allows for a more precise convergence of the light paths, especially in the challenging blue-violet end of the spectrum. For an imager or visual observer, this means:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Chromatic Aberration:\u003c\/strong\u003e Bright stars like Vega or Sirius resolve as sharp points without any distracting purple halos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Contrast:\u003c\/strong\u003e By eliminating unfocused violet light that can wash out an image, subtle details like the Cassini Division in Saturn's rings or faint dust lanes in galaxies become more visible.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the main advantages of the Explore Scientific ED102-FCD100's carbon fiber tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe carbon fiber tube offers two key benefits. First, it is \u003cstrong\u003esignificantly lighter\u003c\/strong\u003e than an equivalent aluminum tube, making the telescope easier to handle and placing less strain on your mount. Second, it has \u003cstrong\u003esuperior thermal stability\u003c\/strong\u003e, meaning it expands and contracts very little with temperature changes, which helps maintain sharp focus during long astrophotography sessions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the HOYA FCD100 glass in the ED102 triplet improve images?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eHOYA FCD100 is a premium Extra-low Dispersion (ED) glass that has optical properties very similar to fluorite. In the ED102's triplet lens design, it is the key element responsible for \u003cstrong\u003eeliminating chromatic aberration\u003c\/strong\u003e (false color). This results in razor-sharp stars, higher contrast, and true-to-life colors, which is essential for both high-resolution imaging and critical visual observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 2.5\" HEX focuser on the ED102-FCD100 suitable for a full astrophotography setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The 2.5\" HEX focuser is specifically designed to support the weight of a heavy imaging train. Its hexagonal drawtube and rack-and-pinion mechanism prevent sagging and flexure, ensuring that your camera, filter wheel, and guider remain perfectly aligned with the optical axis. This rigidity is crucial for achieving sharp, round stars across the entire image frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Explore Scientific ED102-FCD100 perform on a bright target like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ED102-FCD100 will provide exceptional views of the Orion Nebula (M42). Its apochromatic optics will render the stars of the Trapezium cluster as distinct, pinpoint diamonds of light without any color fringing. You will be able to resolve the delicate structures and wisps of nebulosity with high contrast against a dark sky background, making it an ideal instrument for both viewing and imaging this deep-sky showpiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the ED102-FCD100 for high-magnification planetary viewing of Jupiter or Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the ED102-FCD100 is an excellent planetary telescope. Its freedom from chromatic aberration allows you to push the magnification high on nights of good seeing. You can expect to see fine details like the cloud bands and Great Red Spot on Jupiter, and the Cassini Division in Saturn's rings, with crisp, high-contrast views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is recommended for the Explore Scientific ED102-FCD100?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor visual use, a medium-duty alt-azimuth mount would be sufficient. For astrophotography, a mid-sized German Equatorial Mount (GEM) with GoTo capability is recommended to handle the telescope and associated imaging gear. Look for mounts in the payload class of the Celestron AVX, Sky-Watcher EQ6-R Pro, or iOptron CEM40 for stable, long-exposure imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257018420\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967207469341,"sku":"ES-FCD100-10207-CF-01","price":2659.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-ED102-FCD100-Series-Air-Spaced-Triplet-Telescope-in-Carbon-Fiber-FCD100_25E2_2580_259310207-CF-FCD100-10207-CF-1__24574.1594240388.1280.1280.jpg?v=1684339033"},{"product_id":"explore-scientific-ar102-doublet-refractor","title":"Explore Scientific AR102 Doublet Refractor","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e102mm (4-inch) Aperture\u003c\/li\u003e\n\u003cli\u003ef\/6.5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e11.5 lbs Optical Tube Weight\u003c\/li\u003e\n\u003cli\u003eTwo-Speed 2\" Crayford Focuser\u003c\/li\u003e\n\u003cli\u003eIncludes 2\" Dielectric Diagonal \u0026amp; 8x50 Finderscope\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific AR102 Doublet Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific AR102 Doublet Refractor combines a 102mm air-spaced doublet objective with a fast f\/6.5 focal ratio to deliver bright, high-contrast images of the Moon, planets, and deep-sky objects. Weighing just 11.5 lbs, this optical tube assembly is exceptionally portable and comes equipped with a 2-inch two-speed Crayford focuser, a 2-inch dielectric diagonal, and an 8x50 finderscope for a complete observing package right out of the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 102mm f\/6.5 Air-Spaced Doublet\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the AR102 is a classic crown-and-flint air-spaced doublet lens. This design provides sharp, contrasty views that make it an excellent choice for detailed lunar observation, resolving the cloud belts of Jupiter, or framing bright star clusters like the Pleiades (M45). Its f\/6.5 focal ratio offers a wide field of view, ideal for sweeping the Milky Way.\u003c\/p\u003e\n\u003cp\u003eAs an achromatic refractor, the AR102 will exhibit some minor chromatic aberration, or false color, on the brightest objects like Venus and Sirius. This is an expected optical trade-off for the design, which prioritizes portability and affordability over the color correction of a more expensive apochromatic system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Ready-to-Image Platform: 2-Speed Focuser and 2\" Diagonal\u003c\/h3\u003e\n\u003cp\u003eExplore Scientific includes professional-grade components that elevate the AR102's usability. The precision two-speed 2\" Crayford focuser allows for smooth, exact focus adjustments, which are critical for capturing sharp planetary images. The included 2\" dielectric-coated diagonal maximizes light transmission and enables the use of wide-field 2\" eyepieces for immersive views.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8x50 Finderscope:\u003c\/strong\u003e The large aperture straight-through finder makes locating faint targets significantly easier than with smaller red-dot finders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick-Release Base:\u003c\/strong\u003e The finder mounts to a hybrid quick-release base for fast setup and breakdown.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVixen-Style Dovetail:\u003c\/strong\u003e A sturdy cradle ring with a standard Vixen-style dovetail plate ensures compatibility with a vast range of popular astronomical mounts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eGrab-and-Go Astronomy at 11.5 lbs\u003c\/h3\u003e\n\u003cp\u003eWith an optical tube weight of only 11.5 lbs, the AR102 is a truly portable instrument. It's light enough to be managed easily by one person and pairs well with medium-duty alt-azimuth or equatorial mounts, creating a setup that can be moved and assembled in minutes. This portability makes it an ideal telescope for educational outreach, public star parties, or simply taking to a dark-sky site on a moment's notice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eExplore Scientific AR102 vs. Standard 4-inch Achromats\u003c\/h3\u003e\n\u003cp\u003eWhile many 4-inch achromatic refractors offer similar optical views, the AR102 distinguishes itself with its standard accessories. Competing telescopes in this class often ship with a basic single-speed focuser and a 1.25\" diagonal, requiring immediate upgrades for serious observing or imaging.\u003c\/p\u003e\n\u003cp\u003eThe Explore Scientific AR102, by contrast, includes a two-speed focuser and a 2\" dielectric diagonal from the start. These features provide a superior out-of-the-box experience, saving you the expense and effort of sourcing these critical components separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is best for the Explore Scientific AR102?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its light weight of \u003cstrong\u003e11.5 lbs\u003c\/strong\u003e, the AR102 is well-supported by a variety of mounts. For visual use, a medium-duty alt-azimuth mount like the Explore Scientific Twilight I or a Vixen Porta Mount II will provide a stable, intuitive grab-and-go setup. For astrophotography, a German equatorial mount with a payload capacity of at least 20 lbs, such as a Celestron AVX or Sky-Watcher HEQ5, is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I see color fringing (chromatic aberration) with the AR102 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, as an achromatic refractor, the AR102 will show a slight purple or violet halo around the brightest stars and planetary limbs. This is a characteristic of the two-element lens design. While it is noticeable on targets like Vega or Jupiter, it is generally well-controlled and does not significantly impact views of fainter deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Explore Scientific AR102 perform on the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AR102 provides excellent views of the Orion Nebula (M42). Its \u003cstrong\u003e102mm aperture\u003c\/strong\u003e gathers enough light to reveal the intricate structures of the nebula's gas clouds, and the f\/6.5 focal ratio allows you to frame the entire object in a single field of view with a low-power, wide-field eyepiece. You will be able to easily resolve the four primary stars of the Trapezium cluster at its core.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the AR102 a good telescope for viewing Jupiter and Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The AR102's high-contrast optics are well-suited for planetary viewing. With a good quality high-power eyepiece, you will be able to clearly see Jupiter's main cloud belts and its four Galilean moons. On Saturn, the rings are sharply defined, and you can often spot the Cassini Division on nights of steady seeing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2-inch eyepieces with the Explore Scientific AR102?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The AR102 comes standard with a \u003cstrong\u003e2-inch focuser\u003c\/strong\u003e and a \u003cstrong\u003e2-inch diagonal\u003c\/strong\u003e, allowing you to take full advantage of wide-field 2-inch eyepieces. This is a significant advantage for observing large deep-sky objects and star fields.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to start astrophotography with the Explore Scientific AR102?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo begin imaging with the AR102, you will need a sturdy German equatorial mount for tracking, a camera (DSLR or dedicated astronomy camera), and a T-ring and T-adapter to connect the camera to the telescope's focuser. For improved results, a field flattener is recommended to correct for field curvature inherent in fast refractors, and an autoguiding system will enable longer, sharper exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Crown-and-Flint Doublet Achromat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e102mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e663mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" Two-Speed Crayford\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagonal\u003c\/td\u003e\n\u003ctd\u003e2\" Dielectric, 99% Reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e8x50 Straight-Through\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eCradle Rings with Vixen-Style Dovetail Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e11.5 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257010080\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAR102 Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Two-Speed Crayford Focuser\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Dielectric Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e8x50 Straight-Through Finderscope with Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCradle Ring Assembly with Vixen-Style Dovetail\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967207698717,"sku":"ES-DAR102065-02","price":629.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-AR102-Air-Spaced-Doublet-Refractor-DAR102065-01-DAR102065-01-1__23671.1594240392.1280.1280.jpg?v=1684338864"},{"product_id":"explore-scientific-fcd100-series-127mm-f-7-5-triplet-apo-refractor-aluminum-with-2-5-hex-focuser","title":"Explore Scientific FCD100 Series 127mm f\/7.5 Triplet APO Refractor - Aluminum with 2.5\" HEX Focuser","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e127mm (5\") Aperture\u003c\/li\u003e\n\u003cli\u003ef\/7.5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Triplet Apochromatic Optics\u003c\/li\u003e\n\u003cli\u003eHOYA FCD100 ED Glass Element\u003c\/li\u003e\n\u003cli\u003e2.5\" Hexagonal Rack-and-Pinion Focuser\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific FCD100 Series 127mm f\/7.5 Triplet APO Refractor - Aluminum with 2.5\" HEX Focuser\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific FCD100 Series 127mm f\/7.5 Triplet APO Refractor combines a large, diffraction-limited objective with premium optical materials to deliver pristine, high-contrast images. Its air-spaced triplet lens and robust 2.5\" HEX focuser create an exceptional platform for both demanding visual observation and advanced astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e127mm FCD100 Triplet Optics: Apochromatic Views at f\/7.5\u003c\/h3\u003e\n\u003cp\u003eAt the heart of this refractor is a 127mm air-spaced triplet objective featuring genuine HOYA FCD100 glass. This extra-low dispersion (ED) element virtually eliminates chromatic aberration, resulting in images free of false color and purple fringing around bright stars and planetary limbs. Combined with Explore Scientific's EMD enhanced multi-layer coatings, the optical system delivers maximum light transmission for brilliant, true-to-life views.\u003c\/p\u003e\n\u003cp\u003eThe f\/7.5 focal ratio provides a versatile balance, offering enough magnification for fine details on Jupiter's cloud bands and Saturn's rings while remaining wide enough to frame many deep-sky targets. Stars resolve to sharp, pinpoint dots against a dark sky, revealing subtle structures in nebulae and galaxies that lesser optics would smear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e2.5\" HEX Focuser: A Smooth and Stable Imaging Platform\u003c\/h3\u003e\n\u003cp\u003eThe telescope includes a rigid 2.5\" hexagonal rack-and-pinion focuser designed to prevent flexure and slippage, even with heavy camera setups. This design offers greater stability than conventional Crayford focusers, ensuring your imaging train remains securely aligned throughout a long exposure. The smooth, precise motion allows for critical focus adjustments necessary for high-resolution planetary imaging and sharp deep-sky astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 127mm Tube Assembly: Integrated for Field Use\u003c\/h3\u003e\n\u003cp\u003eThe aluminum optical tube is engineered for both durability and portability. It incorporates several features designed for practical use in the field, minimizing setup time and improving your observing sessions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable Dew Shield:\u003c\/strong\u003e An integrated dew shield slides forward to prevent moisture from forming on the objective lens and blocks stray light from degrading image contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCradle Rings \u0026amp; Handle:\u003c\/strong\u003e The included cradle ring assembly provides a secure mounting point and features a top-mounted handle, making the 127mm optical tube easy to carry and mount.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVixen-Style Dovetail:\u003c\/strong\u003e A standard V-style dovetail plate ensures compatibility with a wide range of common astronomical mounts right out of the box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFCD100 vs. FPL-53 Glass: The Apochromatic Difference\u003c\/h3\u003e\n\u003cp\u003eIn the world of apochromatic refractors, two glass types stand out for their exceptional color correction: Ohara FPL-53 and HOYA FCD100. Both are elite extra-low dispersion glasses that allow optical designers to bring the entire visual spectrum to a single, sharp focus point. Choosing between them is less about one being superior and more about the specific optical design it enables.\u003c\/p\u003e\n\u003cp\u003eBy using FCD100 in this 127mm triplet, Explore Scientific achieves a level of apochromatic correction that produces textbook-perfect star images and neutral color rendition. For an observer, this means the highest possible contrast and sharpness that the 127mm aperture can deliver, uncompromised by distracting chromatic aberration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Explore Scientific FCD100 127mm APO perform on planets like Jupiter and Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis telescope excels at planetary observation. The 127mm aperture resolves fine details, while the apochromatic FCD100 optics ensure maximum contrast without false color. You can expect to clearly see Jupiter's main cloud bands, the Great Red Spot, and the Cassini Division in Saturn's rings under steady seeing conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Explore Scientific 127mm Triplet suitable for imaging a large nebula like the North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but you will likely need a focal reducer. At its native f\/7.5 focal ratio, the telescope is well-suited for smaller nebulae and galaxies. To fit very large objects like the North American Nebula or the Andromeda Galaxy (M31) into a single frame, adding a 0.7x or 0.8x reducer\/flattener is recommended to widen the field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Explore Scientific FCD127 APO?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor visual use, a medium-duty equatorial mount like a Celestron AVX or Sky-Watcher HEQ5 is sufficient. For astrophotography, a more robust mount in the payload class of a Sky-Watcher EQ6-R Pro or Celestron CGX is strongly recommended to ensure stability for long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the 2.5\" HEX focuser on the FCD100 127mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 2.5\" HEX focuser uses a hexagonal drawtube and a rack-and-pinion mechanism. This design is significantly more rigid than typical Crayford focusers, preventing tilt or flex when loaded with a heavy camera, filter wheel, and off-axis guider. It ensures your entire imaging train remains perfectly orthogonal to the light path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does HOYA FCD100 glass compare to FPL-53 in this refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eHOYA FCD100 and Ohara FPL-53 are considered functional equivalents in their ability to correct for chromatic aberration. Both are premier ED glass types that, when used in a triplet objective lens design, produce a true apochromatic image with virtually no color fringing. The FCD100 glass in this 127mm refractor ensures it delivers performance on par with other premium APOs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2\" eyepieces and accessories with the Explore Scientific 127mm FCD100?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The 2.5\" focuser terminates with a standard 2\" adapter, allowing you to use any 2\" diagonal, eyepiece, or imaging accessory. A 1.25\" adapter is also typically included for use with smaller format eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Triplet Apochromatic Refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e127mm (5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eHOYA FCD100 ED Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2.5\" Hexagonal Rack-and-Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257017621\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967207829789,"sku":"ES-FCD100-127075-02","price":3499.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-FCD100-Series-127mm-f-7-5-Aluminum-Air-Spaced-Triplet-ED-APO-Refractor-with-2-5-inch-HEX-Focuser-FCD100-127075-01-1__30104.1594240394.1280.1280.jpg?v=1684338887"},{"product_id":"explore-scientific-fcd100-series-127mm-f-7-5-triplet-apo-refractor-carbon-fiber-with-2-5-hex-focuser","title":"Explore Scientific FCD100 Series 127mm f\/7.5 Triplet APO Refractor - Carbon Fiber with 2.5\" HEX Focuser","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e127mm Aperture\u003c\/li\u003e\n\u003cli\u003ef\/7.5 Focal Ratio \/ 952mm Focal Length\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Triplet Apochromat with FCD100 Glass\u003c\/li\u003e\n\u003cli\u003eCarbon Fiber Optical Tube\u003c\/li\u003e\n\u003cli\u003e2.5\" HEX Focuser\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eExplore Scientific FCD100 Series 127mm f\/7.5 Triplet APO Refractor - Carbon Fiber with 2.5\" HEX Focuser\u003c\/h2\u003e\n      \u003cp\u003eThe Explore Scientific FCD100 Series 127mm f\/7.5 Triplet APO Refractor combines a 952mm focal length with an air-spaced triplet optical system for high-contrast planetary and deep-sky imaging. Its 2.5\" HEX focuser delivers rigid, precise control over the focal plane, while the premium HOYA FCD100 ED glass element ensures true apochromatic correction.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eThe 127mm FCD100 Triplet: Apochromatic Correction\u003c\/h3\u003e\n      \u003cp\u003eThe heart of this refractor is its 127mm air-spaced triplet objective, which uses a genuine HOYA FCD100 ED glass element to achieve true apochromatic correction. This design brings all wavelengths of light to a single focal point, virtually eliminating the chromatic aberration seen as purple fringing in lesser instruments. The result is pinpoint stars on a black background and high-contrast detail on planets like Saturn and Jupiter, all enhanced by EMD coatings for maximum light transmission.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eCarbon Fiber OTA: Thermal Stability at f\/7.5\u003c\/h3\u003e\n      \u003cp\u003eThe optical tube is constructed from carbon fiber, a material chosen for its high strength-to-weight ratio and low coefficient of thermal expansion. This ensures the 952mm focal length remains stable during long imaging sessions on cooling nights, minimizing the need for refocusing. The lightweight construction makes this 127mm aperture manageable, though it still requires a medium-class equatorial mount for stability.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003e2.5\" HEX Focuser: Heavy Imaging Payloads\u003c\/h3\u003e\n      \u003cp\u003eAstrophotography with heavy imaging trains requires a focuser that won't slip or tilt. The 2.5\" hexagonal rack-and-pinion design meets this demand, ensuring zero image shift and repeatable, precise focus adjustments. This robust construction is essential when using large format cameras, filter wheels, and off-axis guiders.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Explore Scientific 127mm FCD100 refractor?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Explore Scientific 127mm FCD100 is a substantial optical tube and requires a robust equatorial mount for stable imaging. A mount in the 40-50 lb payload capacity class, such as an Explore Scientific EXOS-2GT or Sky-Watcher EQ6-R Pro, is recommended. The specific mounting plate is not listed as an included accessory, so you must ensure you have the correct dovetail bar for your mount.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the FCD100 glass in this 127mm refractor compare to FPL-53?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eHOYA FCD100\u003c\/strong\u003e is optically equivalent to Ohara's FPL-53, one of the most respected extra-low dispersion (ED) glasses available. Both are considered premium materials for building triplet objectives that achieve apochromatic correction. The final color correction depends on the entire optical design, but FCD100 glass places this telescope in the top tier of refractors.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I expect to see of the Orion Nebula (M42) with the Explore Scientific 127mm FCD100?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWith its 127mm aperture and apochromatic optics, you will resolve fine detail within the Orion Nebula (M42). The Trapezium cluster at its heart will be cleanly split into its four primary stars, and the faint, nebulous \"wings\" of the nebula will show intricate structure and excellent contrast against a dark sky background.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 952mm focal length of the ES 127mm FCD100 a good match for imaging Andromeda (M31) with an APS-C sensor?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe 952mm focal length provides an excellent image scale for many deep-sky objects. While the Andromeda Galaxy (M31) is exceptionally large, this focal length will perfectly frame its bright core and extensive dust lanes on a typical APS-C sensor. To capture the full extent of M31 in a single frame, a focal reducer would be required.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the carbon fiber tube on the Explore Scientific 127mm FCD100 important for astrophotography?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eCarbon fiber has a very low coefficient of thermal expansion. This means that as the ambient temperature drops overnight, the telescope tube does not shrink significantly, which keeps the focal point stable. This minimizes focus shift during a long imaging session, resulting in sharper stars from start to finish.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat accessories do I need to start using the Explore Scientific 127mm FCD100 refractor?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis product is an optical tube assembly (OTA) only. At a minimum, you will need a mount, a diagonal, eyepieces for visual use, and a finder scope. The manufacturer does not specify any included accessories, so you should plan on supplying all necessary components to complete your telescope setup.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e127mm (5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7.5\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e952mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Triplet Apochromat\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eHOYA FCD100 ED\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2.5\" Dual-Speed HEX Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon Fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eEMD (Enhanced Multilayer Deposition)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257017812\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eExplore Scientific 127mm FCD100 Carbon Fiber OTA\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967207862557,"sku":"ES-FCD100-127075-CF-01","price":3919.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-FCD100-Series-127mm-f-7-5-Carbon-Fiber-Triplet-ED-APO-Refractor-Telescope-with-2-5-inch-HEX-Focuser-FCD100-127075-CF-1__10510.1594240395.1280.1280.jpg?v=1684338893"},{"product_id":"explore-scientific-ed152-triplet-in-carbon-fiber","title":"Explore Scientific ED152 Triplet in Carbon Fiber","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e152mm (6\") Aperture\u003c\/li\u003e\n\u003cli\u003ef\/8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Triplet Apochromatic Optics\u003c\/li\u003e\n\u003cli\u003eHOYA FCD1 Extra-Low Dispersion Glass\u003c\/li\u003e\n\u003cli\u003eCarbon Fiber Optical Tube\u003c\/li\u003e\n\u003cli\u003e20.5 lbs Optical Tube Assembly Weight\u003c\/li\u003e\n\u003cli\u003e3.3\" Dual-Speed Focuser\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific ED152 Triplet in Carbon Fiber\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific ED152 Triplet combines a large 152mm aperture with an f\/8 optical system to deliver high-contrast, color-pure images for serious observers and astrophotographers. Its air-spaced triplet design incorporates genuine HOYA FCD1 glass to virtually eliminate chromatic aberration, while the advanced carbon fiber tube reduces the total weight to a remarkable 20.5 lbs. This instrument gathers 44% more light than a 127mm refractor, providing the resolving power needed for detailed planetary observation and deep-sky imaging from a surprisingly manageable platform.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e152mm f\/8 Triplet Optics: Apochromatic Correction with HOYA FCD1 Glass\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the ED152 is an air-spaced triplet objective lens featuring HOYA FCD1 extra-low dispersion glass. This apochromatic design corrects false color to an exceptional degree, ensuring that bright stars like Vega or Sirius resolve as sharp, white points without distracting purple halos. The f\/8 focal ratio provides a well-corrected field for imaging while keeping the optical tube a practical length, resulting in high-contrast views of lunar rilles, Jupiter's cloud bands, and the faint tendrils of nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCarbon Fiber Construction: A 20.5 lb Six-Inch Refractor\u003c\/h3\u003e\n\u003cp\u003eA six-inch refractor is typically a heavy instrument, but the ED152's carbon fiber tube brings its weight down to just 20.5 lbs. This significant weight reduction makes the telescope compatible with a wider range of mid-sized equatorial mounts, such as the Losmandy G11, reducing the total payload requirement for a stable imaging setup. Carbon fiber also offers superior thermal stability, minimizing focus shift during long imaging sessions as ambient temperature drops.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready Mechanics: 3.3\" Focuser and 2\" Diagonal\u003c\/h3\u003e\n\u003cp\u003eEngineered for demanding imaging applications, the ED152 is equipped with a robust 3.3\" focuser. This large-aperture focuser is designed to handle heavy cameras, filter wheels, and off-axis guiders without flexure, ensuring a rigid and reliable optical train. A 2\" diagonal is included for visual use, allowing you to take full advantage of wide-field 2\" eyepieces for sweeping views of the Milky Way or large objects like the Andromeda Galaxy (M31).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e125% More Light Than an ED102: The Power of a 152mm Aperture\u003c\/h3\u003e\n\u003cp\u003eThe 152mm objective provides a significant jump in light-gathering power over smaller refractors. Compared to the popular 102mm format, the ED152 collects 125% more light, and 44% more than the 127mm model. This light-gathering advantage translates directly to brighter images and shorter exposure times, allowing you to resolve fainter stars in globular clusters like M13 and capture more detail in the spiral arms of distant galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the carbon fiber tube on the ED152 improve performance?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe carbon fiber tube offers two main advantages. First, it reduces the optical tube's weight to just \u003cstrong\u003e20.5 lbs\u003c\/strong\u003e, making it usable on lighter, more portable equatorial mounts. Second, carbon fiber has a very low coefficient of thermal expansion, which means it resists shrinking or expanding with temperature changes, keeping the focal point stable during long imaging sessions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Explore Scientific ED152 CF?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eGiven its \u003cstrong\u003e20.5 lbs\u003c\/strong\u003e weight, the ED152 Carbon Fiber version works well on mounts with a payload capacity of 40 lbs or more for visual use, and 50 lbs or more for stable astrophotography. Mounts like the Losmandy G11 or similar-class mounts are excellent choices.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ED152 triplet suitable for planetary viewing of Jupiter or Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The \u003cstrong\u003e152mm\u003c\/strong\u003e apochromatic triplet optics are ideal for high-magnification planetary viewing. The HOYA FCD1 glass provides superb color correction, allowing you to see fine details like Jupiter's Great Red Spot, the Cassini Division in Saturn's rings, and subtle surface shadings on Mars with exceptional contrast and clarity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the advantages of the 152mm aperture for deep-sky objects like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe large \u003cstrong\u003e152mm\u003c\/strong\u003e aperture gathers significantly more light than smaller refractors (\u003cstrong\u003e125% more\u003c\/strong\u003e than a 102mm), which is crucial for faint deep-sky objects. On the Orion Nebula (M42), this means you'll resolve the Trapezium cluster into more distinct stars and see fainter, more intricate structures within the surrounding gas clouds, both visually and in images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"air-spaced triplet\" mean for the ED152's optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn \"air-spaced triplet\" refers to an objective lens made of three individual glass elements separated by a thin cushion of air. This design gives optical engineers more variables to work with to correct for chromatic aberration (false color) and other optical errors, resulting in the sharp, high-contrast, apochromatic images the \u003cstrong\u003eED152\u003c\/strong\u003e produces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the HOYA FCD1 glass in the ED152 affect image quality?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eHOYA FCD1\u003c\/strong\u003e is a high-grade, extra-low dispersion (ED) glass that has optical properties similar to fluorite. Its primary function is to bend different colors of light to the same focal point. This drastically reduces chromatic aberration, leading to images that are free from color fringing and have much higher contrast and sharpness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Triplet Apochromatic Refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e152mm (6\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eHOYA FCD1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon Fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3.3\" Dual-Speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Diagonal\u003c\/td\u003e\n\u003ctd\u003e2\" Dielectric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e20.5 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e811803035102\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967207895325,"sku":"ES-TED15208CF-HEX33","price":5599.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Explore-Scientific-ED152-Air-Spaced-Triplet-in-Carbon-Fiber-TED15208CF-HEXDD3-TED15208CF-HEXDD3-1__94308.1594240396.1280.1280.jpg?v=1684338895"},{"product_id":"william-optics-fluorostar-132","title":"William Optics Fluorostar 132","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e132mm Aperture, 910mm Focal Length (f\/6.9)\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Triplet Apochromatic Objective\u003c\/li\u003e\n\u003cli\u003ePremium FPL-53 Glass for Superior Color Correction\u003c\/li\u003e\n\u003cli\u003eHeavy-Duty 3.7\" Rack \u0026amp; Pinion Focuser\u003c\/li\u003e\n\u003cli\u003e360° Rotatable Focuser for Easy Framing\u003c\/li\u003e\n\u003cli\u003eFully CNC-Machined Aluminum Tube\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eWilliam Optics Fluorostar 132 APO Refractor\u003c\/h2\u003e\n\u003cp\u003eThe William Optics Fluorostar 132 combines a 132mm aperture with a 910mm focal length (f\/6.9) to serve as a premier instrument for high-resolution astrophotography and critical visual observation. Its air-spaced triplet objective lens uses premium FPL-53 glass to achieve apochromatic correction, while the massive 3.7-inch Rack \u0026amp; Pinion focuser provides zero-flexure support for full-frame imaging systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e132mm f\/6.9 FPL-53 Triplet: Pure Color Correction\u003c\/h3\u003e\n\u003cp\u003eAt the core of the Fluorostar 132 is a three-element objective lens featuring FPL-53 glass, the gold standard for color error correction. This apochromatic design virtually eliminates chromatic aberration, ensuring there is no spurious purple or green fringing around bright stars like Vega or on the limb of Jupiter. With high-transmission STM coatings, the FLT132 delivers exceptionally high contrast, revealing subtle planetary details and rendering stars as sharp, color-pure points against a black-sky background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e3.7\" Rack \u0026amp; Pinion Focuser: 360° of Imaging Precision\u003c\/h3\u003e\n\u003cp\u003eDesigned for the demands of modern astrophotography, the FLT132 is equipped with a heavy-duty 3.7\" rack and pinion focuser. This large-aperture focuser can carry heavy imaging trains—including large-format cameras, filter wheels, and off-axis guiders—without sagging or flexure. For perfect composition, the entire focuser assembly rotates a full 360 degrees, allowing you to frame targets like the North American Nebula (NGC 7000) exactly as you wish without ever loosening your camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Robust 132mm OTA with CNC-Machined Precision\u003c\/h3\u003e\n\u003cp\u003eThe optical tube is crafted from solid CNC-machined aluminum, providing a rigid and thermally stable platform essential for consistent focus through long imaging sessions. The powder-painted white tube is durable and presents a classic, clean aesthetic. Every Fluorostar 132 includes a high-quality soft carrying case, protecting your investment during transport to dark-sky sites and making this powerful 132mm refractor surprisingly manageable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFLT132 vs. Standard 130mm Refractors: The 3.7\" Focuser Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile many refractors in the 130mm class deliver excellent optical views, the Fluorostar 132 sets itself apart with its imaging-centric design, most notably its focuser.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical Refractors:\u003c\/strong\u003e Many competitors use 2.5\" or 3\" focusers, which are adequate for smaller sensors but can become a bottleneck for flexure and illumination with larger cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFluorostar 132:\u003c\/strong\u003e The 3.7\" focuser provides a wider, unvignetted light path for full-frame and larger sensors, especially when paired with a compatible reducer or flattener. Its robust build quality means you can invest in a heavy imaging setup without needing to budget for an immediate focuser upgrade.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Fluorostar 132 perform on planetary targets like Jupiter with its 910mm focal length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eWilliam Optics Fluorostar 132\u003c\/strong\u003e is an excellent planetary instrument. Its 910mm focal length provides ample image scale for planets, and the FPL-53 triplet optics deliver the high-contrast, color-free views needed to resolve fine details like Jupiter's Great Red Spot, cloud bands, and the Cassini Division in Saturn's rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the FLT132 suitable for imaging large deep-sky objects like the Andromeda Galaxy (M31) with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. At its native 910mm focal length, the FLT132 will frame the core of M31 beautifully. When paired with a compatible field flattener or reducer, it provides a flat, well-corrected field for full-frame sensors. The large 3.7\" focuser is specifically designed to prevent vignetting and support the weight of a full-frame imaging setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the FPL-53 triplet objective in the Fluorostar 132 superior to a doublet?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003etriplet objective\u003c\/strong\u003e with \u003cstrong\u003eFPL-53 glass\u003c\/strong\u003e corrects for chromatic aberration (false color) across a much wider spectrum than a standard doublet. This results in significantly higher contrast, sharper stars with no color fringing, and more faithful color rendition in astrophotos, which is especially critical for imaging and observing bright objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the 3.7\" focuser on the William Optics FLT132?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e3.7\" Rack \u0026amp; Pinion focuser\u003c\/strong\u003e offers two main advantages for astrophotography:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Payload Capacity:\u003c\/strong\u003e It can hold heavy cameras, filter wheels, and other accessories without flexing or slipping, ensuring consistent focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Illumination:\u003c\/strong\u003e The large diameter prevents vignetting (darkening of the corners) on large camera sensors, such as full-frame DSLRs or dedicated astronomy cameras.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat field flatteners are compatible with the FLT132?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe William Optics Fluorostar 132 is designed to be compatible with several of their high-quality field flatteners and reducers, including the \u003cstrong\u003eP-FLAT68III\u003c\/strong\u003e, \u003cstrong\u003eP-Flat7A\u003c\/strong\u003e, and \u003cstrong\u003eP-Flat8\u003c\/strong\u003e. Using one of these accessories is recommended for astrophotography to ensure pinpoint stars across the entire field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Fluorostar 132 come with a case for transport?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the William Optics FLT132 includes a high-quality soft carrying case. This padded case is designed to protect the telescope during storage and transport to your observing location.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e132mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e910mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Apochromatic Triplet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Glass\u003c\/td\u003e\n\u003ctd\u003eFPL-53\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eSTM Coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3.7\" Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Rotation\u003c\/td\u003e\n\u003ctd\u003e360 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Construction\u003c\/td\u003e\n\u003ctd\u003eCNC-machined Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Flatteners\u003c\/td\u003e\n\u003ctd\u003eP-FLAT68III, P-Flat7A, P-Flat8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Colors\u003c\/td\u003e\n\u003ctd\u003eRed, Gold, Grey\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFluorostar 132 Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSoft Carrying Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Red \/ 3.3\" R\u0026P","offer_id":44967227457821,"sku":"WO-A-F132RDIII-RP33R","price":6304.0,"currency_code":"CAD","in_stock":true},{"title":"Red \/ 3.5\" Feather Touch","offer_id":44967227556125,"sku":"WO-A-F132RDIII-FTR","price":8162.0,"currency_code":"CAD","in_stock":true},{"title":"Gold \/ 3.3\" R\u0026P","offer_id":44967227425053,"sku":"WO-A-F132GDIII-RP33R","price":6304.0,"currency_code":"CAD","in_stock":true},{"title":"Gold \/ 3.5\" Feather Touch","offer_id":44967227490589,"sku":"WO-A-F132GDIII-FTR","price":8162.0,"currency_code":"CAD","in_stock":true},{"title":"Grey \/ 3.3\" R\u0026P","offer_id":48966062702877,"sku":"WO-A-F132TGIV-RP37","price":6897.0,"currency_code":"CAD","in_stock":true},{"title":"Grey \/ 3.5\" Feather Touch","offer_id":48966062735645,"sku":"WO-A-F132TGIV-FT","price":8162.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/William-Optics-FLT132-1.jpg?v=1722277044"},{"product_id":"william-optics-fluorostar-156","title":"William Optics Fluorostar 156","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e156mm Aperture Triplet Apochromat\u003c\/li\u003e\n\u003cli\u003e1217mm Focal Length (f\/7.8)\u003c\/li\u003e\n\u003cli\u003eFPL-53 \u0026amp; Lanthanum Glass Elements\u003c\/li\u003e\n\u003cli\u003e3.7\" Rack \u0026amp; Pinion Focuser\u003c\/li\u003e\n\u003cli\u003eThermally Stable Steel Objective Cell\u003c\/li\u003e\n\u003cli\u003eIntegrated Bahtinov Mask in Dust Cover\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eWilliam Optics Fluorostar 156 f\/7.8 Triplet APO Refractor\u003c\/h2\u003e\n\u003cp\u003eThe William Optics Fluorostar 156 combines a large 156mm aperture with a 1217mm (f\/7.8) focal length in a precision-engineered, air-spaced triplet optical system. Featuring premium FPL-53 glass and a Lanthanum element, this apochromatic refractor suppresses false color to undetectable levels, supported by a massive 3.7\" Rack \u0026amp; Pinion focuser for precise, no-slip focusing with heavy imaging payloads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 156mm f\/7.8 Triplet APO: Color-Free Views with FPL-53 Glass\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the Fluorostar 156 lies an air-spaced triplet objective that sets the standard for color correction and contrast. By combining a key element of FPL-53 glass with another of Lanthanum, the optical design brings all wavelengths of visible light to a single, sharp focal point. This eliminates the distracting purple fringing seen on bright stars in lesser instruments, delivering crisp, high-contrast views of planetary details and pinpoint stars across the entire field for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThermally Stable Steel Cell: Maintaining Collimation at 156mm\u003c\/h3\u003e\n\u003cp\u003eA large 156mm objective lens is susceptible to subtle shifts as ambient temperature drops, which can degrade image sharpness. William Optics addresses this with a robust steel objective cell that mitigates thermal expansion and contraction. This ensures the triplet lens elements remain in perfect alignment throughout a long imaging session, preserving the exquisite optical correction from dusk until dawn.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready Mechanics: A 3.7\" Focuser and Integrated Bahtinov Mask\u003c\/h3\u003e\n\u003cp\u003eThe Fluorostar 156 is built from the ground up for serious astrophotography. The heavy-duty 3.7\" rack and pinion focuser provides a rigid, stable platform for large cameras and filter wheels, eliminating flexure and focus shift. For achieving perfect focus, the lens cap features an integrated Bahtinov mask—a critical tool for hitting sharp focus in seconds. The entire optical tube is secured by three CNC-machined rings and a standard Losmandy-style dovetail plate, creating a solid foundation for any capable equatorial mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the William Optics Fluorostar 156?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDue to its aperture and focal length, the Fluorostar 156 is a substantial instrument. A robust equatorial mount with a payload capacity of at least 50-60 lbs (22-27 kg) or more is strongly recommended for stable imaging and visual use. Mounts in the Celestron CGX, Losmandy G11, or Software Bisque Paramount MYT class are appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the FPL-53 and Lanthanum glass in the Fluorostar 156 benefit astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis combination of exotic glass types provides exceptional apochromatic performance. For astrophotography, this means:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Chromatic Aberration:\u003c\/strong\u003e Bright stars like Vega or Sirius will not have distracting blue or purple halos, resulting in cleaner, more natural-looking star fields.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Contrast:\u003c\/strong\u003e By focusing all colors to the same point, fine details in nebulae and galaxies are not smeared or washed out, leading to sharper and more detailed images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Spectrographic Use:\u003c\/strong\u003e The clean color correction makes this an excellent instrument for use with narrowband filters (H-alpha, OIII, SII), as stars will be tight and round across all filtered channels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the integrated Bahtinov mask on the Fluorostar 156?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Bahtinov mask, integrated directly into the dust cover, is a significant convenience for astrophotographers. It creates a distinctive diffraction pattern around a bright star that instantly shows you when you have achieved perfect focus. This eliminates the guesswork of trying to find the point of sharpest focus by eye, saving valuable imaging time and ensuring your data is critically sharp every time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Fluorostar 156 for visual observation as well as imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While optimized for imaging, the Fluorostar 156 is a superb visual instrument. Its 156mm aperture provides brilliant, high-resolution views of the Moon, planets, and deep-sky objects. The apochromatic optics deliver a pure, high-contrast image that is free of false color, making it ideal for discerning subtle cloud bands on Jupiter or resolving tight double stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Fluorostar 156 perform on faint details in the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Fluorostar 156's combination of 156mm aperture and high-contrast optics makes it an exceptional tool for M42. Visually, you can expect to resolve the E and F stars in the Trapezium cluster under good seeing conditions. For imaging, the 1217mm focal length perfectly frames the nebula's core while the sharp optics will capture the faint, intricate structures of the surrounding nebulosity with stunning clarity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 1217mm focal length of the Fluorostar 156 suitable for imaging smaller galaxies like the Whirlpool Galaxy (M51)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the 1217mm focal length is an excellent match for medium-to-small deep-sky objects like M51, the Hercules Cluster (M13), or the Ring Nebula (M57). It provides enough image scale to resolve spiral arms, dust lanes, and individual stars in globular clusters, especially when paired with a modern astronomy camera with small pixels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e156mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1217mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Triplet Apochromat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Composition\u003c\/td\u003e\n\u003ctd\u003eFPL-53 \u0026amp; Lanthanum Elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3.7\" Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Cell Construction\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Accent Colors\u003c\/td\u003e\n\u003ctd\u003eRed, Gold, Space Grey\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFluorostar 156 OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e3.7\" Rack \u0026amp; Pinion Focuser\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBahtinov Mask Cover\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCNC Tube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eLosmandy-style Dovetail Plate\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSoft Carry Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Red","offer_id":44967228080413,"sku":"WO-A-F156RD-RP37","price":10653.0,"currency_code":"CAD","in_stock":true},{"title":"Gold","offer_id":44967228014877,"sku":"WO-A-F156GD-RP37","price":12417.0,"currency_code":"CAD","in_stock":true},{"title":"Grey","offer_id":44967228047645,"sku":"WO-A-F156TG-RP37","price":12417.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/William-Optics-FLT156-1.jpg?v=1722277379"},{"product_id":"william-optics-gran-turismo-71-apo-triplet","title":"William Optics Gran Turismo 71 APO Triplet","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e71mm Triplet Apochromatic Lens\u003c\/li\u003e\n\u003cli\u003e419mm Focal Length at f\/5.9\u003c\/li\u003e\n\u003cli\u003e44mm Full-Frame Image Circle\u003c\/li\u003e\n\u003cli\u003e2.5\" Rack \u0026amp; Pinion Focuser\u003c\/li\u003e\n\u003cli\u003eOTA Weight: 2.95 kg (6.5 lbs)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eWilliam Optics Gran Turismo 71 APO Triplet\u003c\/h2\u003e\n\u003cp\u003eThe William Optics Gran Turismo 71 APO Triplet combines a 71mm aperture with a 419mm focal length in a fast f\/5.9 optical design. Its triplet objective lens, featuring FPL-53 glass, delivers sharp, high-contrast images free of false color, illuminating a full-frame 44mm image circle. Weighing just 2.95 kg, the GT71 is engineered for premium wide-field astrophotography on portable, lightweight tracking mounts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eTriplet APO Optics: 419mm at f\/5.9 with FPL-53 Glass\u003c\/h3\u003e\n\u003cp\u003eThe core of the GT71 is its air-spaced triplet apochromatic lens. This design uses an FPL-53 glass element to virtually eliminate chromatic aberration, ensuring star colors are rendered accurately and details are resolved with high contrast. The native 419mm focal length at f\/5.9 provides a versatile field of view, ideal for capturing large nebulae and star clusters while maintaining a manageable image scale for galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready Mechanics: 2.5\" R\u0026amp;P Focuser and 44mm Image Circle\u003c\/h3\u003e\n\u003cp\u003eBuilt for modern astrophotography, the Gran Turismo 71 is equipped with a heavy-duty 2.5\" rack-and-pinion focuser. This focuser provides 93mm of travel and can handle heavy imaging trains without slipping, while being directly compatible with electronic focusers like the ZWO EAF. The optical system is designed to produce a flat, well-illuminated 44mm image circle, fully covering full-frame sensors from edge to edge with the addition of an optional flattener.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera Compatibility:\u003c\/strong\u003e The 44mm image circle supports Full Frame, APS-C, and M4\/3 sensors, offering flexibility for your current and future cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Reducers:\u003c\/strong\u003e Choose the FLAT GT 1.0x for edge-to-edge correction at the native 419mm focal length, or the FLAT 6AIII 0.8x reducer to transform the scope into a faster f\/4.7 system for even wider fields.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera Angle Adjuster:\u003c\/strong\u003e A 360° camera angle adjuster is included, allowing for precise framing of your target without altering focus.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eGrab-and-Go Design: 2.95 kg with Vixen\/Arca-Swiss Dovetail\u003c\/h3\u003e\n\u003cp\u003eThe entire optical tube assembly weighs only 2.95 kg (6.5 lbs), making the GT71 an ideal choice for portable setups like the Sky-Watcher Star Adventurer or iOptron SkyGuider Pro. Its adjustable tube length, from 392mm to 470mm, allows for compact storage and travel. The integrated dovetail bar features both a Vixen-style rail for astronomy mounts and an Arca-Swiss profile for direct attachment to standard photographic tripods, adding to its field versatility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the William Optics GT71 be used with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Gran Turismo 71 is designed with a \u003cstrong\u003e44mm image circle\u003c\/strong\u003e, which is large enough to fully illuminate a standard full-frame sensor (typically 43mm diagonal) without vignetting. For optimal edge-of-field star shapes, pairing it with a dedicated flattener like the FLAT GT 1.0x or the FLAT 6AIII 0.8x reducer is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the Gran Turismo 71?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an OTA weight of only \u003cstrong\u003e2.95 kg (6.5 lbs)\u003c\/strong\u003e, the GT71 is exceptionally versatile. It performs well on robust star trackers like the Sky-Watcher Star Adventurer GTi or small equatorial mounts in the EQ3\/EQM-35 class. For more serious imaging with autoguiding, a mount from the HEQ5\/CEM26 class is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the GT71 perform on the North American Nebula (NGC 7000) with the 0.8x reducer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe GT71 is an excellent choice for this target. With the optional \u003cstrong\u003eFLAT 6AIII 0.8x reducer\u003c\/strong\u003e, the focal length becomes approximately 335mm at f\/4.7. Paired with an APS-C sensor, this combination can easily frame the entire North American Nebula and the adjacent Pelican Nebula (IC 5070) in a single shot with high resolution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the GT71 suitable for visual astronomy on objects like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While optimized for imaging, the GT71's triplet APO lens provides superb, high-contrast views for visual use. On the Orion Nebula (M42), you can expect sharp, pinpoint stars across the Trapezium cluster and clear views of the surrounding nebulosity. With a low-power, wide-field eyepiece, the \u003cstrong\u003e419mm focal length\u003c\/strong\u003e will frame the entire nebula beautifully.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the GT71's f\/5.9 focal ratio?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn \u003cstrong\u003ef\/5.9 focal ratio\u003c\/strong\u003e is considered \"fast\" in astronomical terms. This allows the telescope to collect a significant amount of light in a shorter period compared to slower f\/8 or f\/10 systems. For imagers, this means you can capture more signal and detail in your sub-exposures, reducing total integration time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat adapters are included with the William Optics Gran Turismo 71?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe GT71 includes two visual adapters. The first is an \u003cstrong\u003eM63 to 2\" adapter\u003c\/strong\u003e, allowing you to attach standard 2\" diagonals and eyepieces. The second is a \u003cstrong\u003e2\" to 1.25\" adapter\u003c\/strong\u003e, which steps down the connection to accommodate 1.25\" accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Type\u003c\/td\u003e\n\u003ctd\u003eTriplet APO Prime Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e71 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e419 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2.5\" R\u0026amp;P Focuser Compatible with EAF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Travel\u003c\/td\u003e\n\u003ctd\u003e93 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Format Support\u003c\/td\u003e\n\u003ctd\u003eFull Frame, APS-C, M4\/3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Flattener\/Reducer\u003c\/td\u003e\n\u003ctd\u003eFLAT GT 1.0x, FLAT 6AIII 0.8x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Type\u003c\/td\u003e\n\u003ctd\u003eVixen \u0026amp; Arca-Swiss Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e392 mm (retracted) - 470 mm (extended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e2.95 kg \/ 6.5 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eGran Turismo 71 APO OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eM63 to 2\" Visual Back Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" to 1.25\" Visual Back Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e360° Camera Angle Adjuster (CAA63)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMounting Rings \u0026amp; Dovetail Bar\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eLens Cap\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Red","offer_id":44967229260061,"sku":"WO-A-F71GTII-RD","price":1515.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/William-Optics-GT71-1.jpg?v=1722276408"},{"product_id":"william-optics-zenithstar-61ii-apo","title":"William Optics Zenithstar 61II APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e61mm Aperture Apochromatic Doublet Refractor\u003c\/li\u003e\n\u003cli\u003eOhara FPL-53 ED Glass Element\u003c\/li\u003e\n\u003cli\u003eFast f\/5.9 Focal Ratio for Wide-Field Imaging\u003c\/li\u003e\n\u003cli\u003eIncludes Flat61A Field Flattener\u003c\/li\u003e\n\u003cli\u003e2-inch Dual-Speed Rack \u0026amp; Pinion Focuser\u003c\/li\u003e\n\u003cli\u003eIntegrated Bahtinov Mask in Lens Cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eWilliam Optics Zenithstar 61II APO Refractor\u003c\/h2\u003e\n\u003cp\u003eThe William Optics Zenithstar 61II APO packages a color-free FPL-53 glass doublet and a precise 2-inch dual-speed focuser into a compact, portable optical tube. Designed as a complete wide-field imaging solution, this f\/5.9 refractor includes the essential Flat61A field flattener, delivering an instrument ready for demanding astrophotography right out of its included soft case.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFPL-53 APO Doublet for Apochromatic Imaging\u003c\/h3\u003e\n\u003cp\u003eAt the core of the Zenithstar 61II is an air-spaced doublet objective featuring a genuine Ohara FPL-53 ED glass element. This apochromatic design virtually eliminates chromatic aberration, ensuring stars are rendered as sharp, high-contrast points of light without distracting purple fringing. The result is cleaner raw data with truer color fidelity, whether you're imaging emission nebulae or capturing the subtle hues in a star cluster.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eField-Ready Portability and CNC Mechanicals\u003c\/h3\u003e\n\u003cp\u003eEngineered for the traveling imager, the Z61II is built from CNC-machined aluminum for a rigid yet lightweight frame that holds collimation. The scope includes a Vixen-style dovetail for compatibility with a wide range of popular mounts, and a unique saddle handle bar that simplifies transport while also serving as a mounting point for guide scopes or other accessories. A custom-fit soft carrying case protects the instrument during travel to your favorite dark-sky site.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready with a 2-Inch Focuser and Flat61A Flattener\u003c\/h3\u003e\n\u003cp\u003eWilliam Optics delivers the Z61II as a complete imaging system, not just an optical tube. The 2-inch dual-speed focuser provides the fine adjustment needed for critical focus, a process made simple by the Bahtinov mask cleverly integrated into the lens cap. Crucially, the package includes the matched Flat61A field flattener, which corrects for field curvature to ensure your images have sharp, pinpoint stars from the center to the corners of the frame—an essential component often sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the William Optics Zenithstar 61II ready for astrophotography out of the box?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e The Zenithstar 61II is packaged as a complete imaging solution. It includes the essential \u003cstrong\u003eFlat61A field flattener\u003c\/strong\u003e to ensure sharp stars across your sensor, a precise \u003cstrong\u003e2-inch dual-speed focuser\u003c\/strong\u003e for accurate adjustments, and an integrated \u003cstrong\u003eBahtinov mask\u003c\/strong\u003e in the lens cap for achieving critical focus easily.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the FPL-53 glass in the Zenithstar 61II benefit imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Ohara \u003cstrong\u003eFPL-53 ED glass\u003c\/strong\u003e element provides apochromatic (APO) color correction. This minimizes chromatic aberration, or false color, which can appear as purple halos around bright stars. For imagers, this means sharper stars, higher contrast, and more accurate color data directly from the camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Zenithstar 61II a good portable or travel telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Z61II is designed for portability. Its compact size, lightweight CNC-machined aluminum body, and included padded soft carrying case make it easy to transport. It's an ideal \"grab-and-go\" scope for taking to dark sky sites or on trips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the Zenithstar 61II frame a large target like the North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Zenithstar 61II's wide field of view is perfectly suited for large deep-sky objects. When paired with a camera using an APS-C or smaller sensor, it can easily capture the entirety of massive targets like the North American Nebula (NGC 7000) or the Andromeda Galaxy (M31) in a single frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Zenithstar 61II for visual observing on a small tracking mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While optimized for imaging, the Z61II is also an excellent visual instrument. Its light weight and Vixen dovetail make it a perfect match for portable tracking mounts like the Sky-Watcher Star Adventurer. With a 2-inch diagonal and a low-power, wide-field eyepiece, it provides stunning, expansive views of the Milky Way.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the saddle handle bar on the Zenithstar 61II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe handle bar serves two functions. It provides a secure and balanced grip for carrying the telescope and placing it on a mount. It also features a Vixen-style saddle, allowing you to mount accessories like a small guide scope or a red dot finder directly on top of the optical tube.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Options\u003c\/td\u003e\n\u003ctd\u003eGrey, Gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eZenithstar 61 II APO OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFlat61A Field Flattener\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMounting Rings with Saddle Handle Bar\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eVixen-Style Dovetail Bar\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eLens Cap with Integrated Bahtinov Mask\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSoft Carrying Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Grey","offer_id":44967230898461,"sku":"WO-A-Z61IITG","price":962.0,"currency_code":"CAD","in_stock":true},{"title":"Gold","offer_id":51501958594845,"sku":"WO-A-Z61IIGD","price":962.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/WO-Z-61-II-Grey-1.jpg?v=1722104068"},{"product_id":"apm-140mm-f-7-fpl-53-doublet-apo-refractor-2-5-focuser","title":"APM 140mm F\/7 FPL 53 Doublet APO Refractor - 2.5\" Focuser","description":"\u003c!-- more --\u003e\u003cb\u003eAPM Doublet SD Apo 140 f\/7 FPL53 \u0026amp; Lanthanium H-LAF53 Optical Tube\u003cbr\u003e\u003c\/b\u003e\u003cbr\u003e\u003cspan\u003eThe new APM 140mm f\/980mm Doublet is a mold breaker with high quality. We have painstakingly engineered an optical and tube solution to bring you APM quality at an unheard price. The new 140- SD Apo features a Doublet lens cell using SD glass FPL-53 to maximize performance. Our innovative combination of materials and design has resulted in optical performance far beyond the normal for a telescope of this price. As with all APM telescopes consistency is assured and each telescope goes through an interferometrical test at the 532nm (green) wavelength before shipping.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cu\u003e\u003cb\u003e\u003cspan\u003eThe special feature of the 140mm SD APO:\u003c\/span\u003e\u003c\/b\u003e\u003c\/u\u003e\u003cbr\u003e\u003c\/span\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eVery high quality processed and of convincingly good optical quality\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003cspan\u003eColorless optics with FLP53 glass and \u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e\u003cspan\u003eLanthan H-LAF53 \u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003ePrecise 2.5\" focuser with 1:10 mirco reduction for heavy accessories\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eWith f \/ 7 ideal for visual and photographic purposes\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eCNC tube rings\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eCarry handle\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eVery good value for money\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cspan\u003eWith 980mm focal length, the 140-SD Apo is an impressive all-rounder. From intricate double star observing to high contrast detailed planetary views, this new scope will introduce a whole new group of Astronomy enthusiasts to APM quality.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eTraditional APM quality has been applied in all areas. The new 2.5\" focuser is a Rack and Pinion type, with 1:10 focusing. It remains rigid under high loads making it suitable for imaging. The attention to detail extends to areas like the 2\" and 1.25\" eyepiece adapters. These use a new design of collar clamp, far superior to the common brass compression rings found on lesser designs.\u003cspan\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cspan\u003eAs optional photo accessory for the SD APO 140 f \/ 7, we recommend our Riccardi Flattener APO Reducer 0.75xM82 (the focal length is reduced to 735mm at f \/ 5.25) or our Riccardi APO Flattener Model 2 for APO's. (please look recommended products)\u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eWith the new 140 mm SD Apo we believe we have created an Apochromatic Refractor of incomparable performance and value in its category.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eDelivery contains:\u003c\/b\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eOptical Tube\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1 Pair of Tuberings with handle\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2.5\" Focuser with 1:10 Microfocusing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLosmandy-Style Dovetail\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eShoe for Finderbracket\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003ca href=\"https:\/\/www.cloudynights.com\/articles\/cat\/user-reviews\/apm-140mm-doublet-apo-refractor-r3161\"\u003eReview (Cloudy Nights)\u003c\/a\u003e\u003c\/div\u003e\u003cbr\u003e\u003cbr\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eType of telescope:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eDoublet ED-Apochromat\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLens:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eDoublet ED Apo with FPL-53 Element\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eColor:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eblack \/ white\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube material:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eAluminium\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eAperture:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e140 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal ratio:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003ef\/7\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal length:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e980 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eCoating:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eMulticoated\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eResolution:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e0.83\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLimit value:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e12.5 mag\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eMax. useful visual power:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e280 x\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eBackfokus:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e180 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocuser:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e2.5\" APM Focuser, 360° rotatable, with 1:10 Micro Focusing\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eConnection to eyepiece:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e2\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eViewfinder:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003enone supplied\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube diameter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e157 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLength during observing:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e1030 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTransportation length:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e830 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eDewcap diameter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e186 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLength of dewcap:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e290 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTotal weight:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e9,0 kg ( with Tuberings, handle, 3\" dovetail )\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"APM","offers":[{"title":"Default Title","offer_id":44967665795357,"sku":"APM140-7-2.5ZTA","price":4977.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/APM-140mm-F-7-FPL-53-Doublet-APO-Refractor-2-5-inch-Focuser-1__82048.1600124047.1280.1280.jpg?v=1684345498"},{"product_id":"apm-140mm-f-7-fpl-53-doublet-apo-refractor-3-7-zta-focuser","title":"APM 140mm F\/7 FPL 53 Doublet APO Refractor - 3.7\" ZTA Focuser","description":"\u003c!-- more --\u003e\u003cb\u003eAPM Doublet SD Apo 140 f\/7 FPL53 Optical Tube\u003cbr\u003e\u003c\/b\u003e\u003cbr\u003eThe new APM 140mm f\/980mm Doublet is a mold breaker with high quality. We have painstakingly engineered an optical and tube solution to bring you APM quality at an unheard price. The new 140- SD Apo features a Doublet lens cell using SD glass FPL-53 to maximize performance. Our innovative combination of materials and design has resulted in optical performance far beyond the normal for a telescope of this price. As with all APM telescopes consistency is assured and each telescope goes through an interferometrical test at the 532nm (green) wavelength before shipping.\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cu\u003e\u003cb\u003e\u003cspan\u003eThe special feature of the 140mm SD APO:\u003c\/span\u003e\u003c\/b\u003e\u003c\/u\u003e\u003cbr\u003e\u003c\/span\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eVery high quality processed and of convincingly good optical quality\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eColorless optics with FLP53 glass\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003ePrecise 3.7 \"focuser with 1:10 mirco reduction for heavy accessories\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eWith f \/ 7 ideal for visual and photographic purposes\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eCNC tube rings\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eCarry handle\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eVery good value for money\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003eWith 980mm focal length, the 140-SD Apo is an impressive all-rounder. From intricate double star observing to high contrast detailed planetary views, this new scope will introduce a whole new group of Astronomy enthusiasts to APM quality.\u003cbr\u003e\u003cbr\u003eTraditional APM quality has been applied in all areas. The new 3.7\" focuser is a Rack and Pinion type, with 1:10 focusing. It remains rigid under high loads making it suitable for imaging. The attention to detail extends to areas like the 2\" and 1.25\" eyepiece adapters. These use a new design of collar clamp, far superior to the common brass compression rings found on lesser designs. \u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cspan\u003eAs optional photo accessory for the SD APO 140 f \/ 7, we recommend our Riccardi Flattener APO Reducer 0.75xM82 (the focal length is reduced to 735mm at f \/ 5.25) or our Riccardi APO Flattener Model 2 for APO's. (please look recommended products)\u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003eWith the new 140 mm SD Apo we believe we have created an Apochromatic Refractor of incomparable performance and value in its category.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eDelivery contains:\u003c\/b\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eOptical Tube\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1 Pair of Tuberings with handle\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e3.7\" Focuser with 1:10 Microfocusing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLosmandy-Style Dovetail\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eShoe for Finderbracket\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003ca href=\"https:\/\/www.cloudynights.com\/articles\/cat\/user-reviews\/apm-140mm-doublet-apo-refractor-r3161\"\u003eReview (Cloudy Nights)\u003c\/a\u003e\u003c\/div\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eType of telescope:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eDoublet ED-Apochromat\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLens:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eDoublet ED Apo with FPL-53 Element\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eColor:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eblack \/ white\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube material:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eAluminium\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eAperture:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e140 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal ratio:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003ef\/7\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal length:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e980 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eCoating:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eMulticoated\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eResolution:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e0.83\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLimit value:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e12.5 mag\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eMax. useful visual power:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e280 x\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eBackfokus:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e180 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocuser:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e3.7\" R\u0026amp;P Focuser, Rotation 360°\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eConnection to eyepiece:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e2\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eViewfinder:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003enone supplied\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube diameter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e152 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLength during observing:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e1030 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTransportation length:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e830 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eDewcap diameter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e186 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLength of dewcap:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e290 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTotal weight:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e9.8Kg (with tuberings)\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"APM","offers":[{"title":"Default Title","offer_id":44967665828125,"sku":"APM140-7-3.7ZTA","price":5391.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/APM-140mm-F-7-FPL-53-Doublet-APO-Refractor-3-7-inch-ZTA-Focuser-1__50236.1600124048.1280.1280.jpg?v=1684345500"},{"product_id":"apm-152mm-f-8-fpl-51-doublet-apo-refractor-2-5-focuser","title":"APM 152mm F\/8 FPL 51 Doublet APO Refractor - 2.5\" Focuser","description":"\u003c!-- more --\u003e\u003cb\u003eAPM Doublet ED Apo 152 f\/7.9 Optical Tube with Accessories\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003eThe  APM 152-1200 Doublet is a mold breaker in the 6\" Refractor category. We have painstakingly engineered an optical and tube solution to bring you APM quality at an unheard price. The new 152-1200ED features a Doublet lens cell using ED glass of FPL-51 complimented by a Lanthanum  element to maximize performance. Our innovative combination of materials and design has resulted in optical performance far beyond the normal for a telescope of this price. As with all APM telescopes consistency is assured and each telescope goes through an interferometrical test at the 532nm (green) wavelength before shipping.\u003cbr\u003e\u003cbr\u003eWith a generous 1200mm focal length, the 152-1200ED is an impressive all-rounder. From intricate double star observing to high contrast detailed planetary views, this new scope will introduce a whole new group of Astronomy enthusiasts to APM quality.\u003cbr\u003e\u003cbr\u003eThe new 152-1200ED is also supplied with extensive accessories. Inside the quality Aluminium transport case you will find not only a fantastic value telescope but also a newly designed 2.5\" focuser, CNC tube rings incorporating a carrying handle, 330mm Losmandy style dovetail and finder bracket.\u003cbr\u003e\u003cbr\u003eTraditional APM quality has been applied in all areas. The new 2.5\" focuser is a Rack and Pinion type, with 1:10 focusing. It remains rigid under high loads making it suitable for imaging. The attention to detail extends to areas like the 2\" and 1.25\" eyepiece adapters. These use a new design of collar clamp, far superior to the common brass compression rings found on lesser designs. Of course, if you would like to use a Starlight Instruments Feather Touch (model FTF3035B-A) then this can be supplied as an option, for that reason the tube end has an thread M109 x 1 and M95 x 1 to accept a 3\" or 2.5\" Starlight focuser.\u003cbr\u003e\u003cbr\u003eImaging accessories for the 152-1200 include a 2.5\" (Order Nr. TSFlat2,5) field flattener which maintains focal length. There is also a dedicated Massimo Riccardi designed APM Reducer (Order Nr.  APM-RIRED152-1200S-2L or APM-RIRED152-1200-2L). This changes the focal length by a factor of x0.75, resulting in a 900mm focal length and fast f5.9 aperture.\u003cbr\u003e\u003cbr\u003eWith the new 152-1200ED we believe we have created an Apochromatic Refractor of incomparable performance and value in its category.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eDelivery contains:\u003c\/b\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eOptical Tube\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1 Pair of Tuberings\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2,5\" Focuser with 1:10 Microfocusing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2\"\/1,25\" del. adapter\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eShoe for Finderbracket\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCarrying Case\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003ca href=\"https:\/\/www.cloudynights.com\/articles\/cat\/user-reviews\/review-of-the-apm-152-ed-serial-number-245-r3175\"\u003eReview (Cloudy Night)\u003c\/a\u003e\u003c\/div\u003e\u003ci\u003e\u003c\/i\u003e\u003cbr\u003e\u003cbr\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eType of telescope:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eDoublet ED-Apochromat\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLens:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eDoublet ED Apo with FPL51 Element\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eColor:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eblack \/ white\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube material:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eAluminium\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eAperture:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e152 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal ratio:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003ef\/7.9\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal length:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e1200 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eCoating:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eBroadband Mulitcoated\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eResolution:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e0.76\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLimit value:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e12.7 mag\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eMax. useful visual power:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e300 x\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eBackfokus:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e180 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocuser:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e2.5\" Rack and Pinion Focuser with 1:10 Micro Focusing\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eConnection to eyepiece:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eM68, 2\" and 1.25\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eViewfinder:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003enone supplied\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube diameter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e156 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLength during observing:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e1220 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTransportation length:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e1020 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eDewcap diameter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e186 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube weight:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e23.6 lb incl. Tuberings and 3\" Dovetail, 18.6 lb Tube only without Caps\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eCase:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eyes\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eCase weight:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e26.4 lb\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTotal weight:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e55,66\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eEyepiece adapter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eto 2\" and 1.25\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"APM","offers":[{"title":"Default Title","offer_id":44967665926429,"sku":"APM-152-1200-FPL51\/La-D-2.5ZTA","price":4977.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/APM-152mm-F-8-FPL-51-Doublet-APO-Refractor-2-5-inch-Focuser-1__31812.1600124049.1280.1280.jpg?v=1684345527"},{"product_id":"apm-152mm-f-8-fpl-51-doublet-apo-refractor-3-7-zta-focuser","title":"APM 152mm F\/8 FPL 51 Doublet APO Refractor - 3.7\" ZTA Focuser","description":"\u003c!-- more --\u003e\u003cb\u003eAPM Refractor Telescope Doublet ED Apo 152 f\/7.9 OTA with 3.7\" focuser\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003eThe new APM 152-1200 Doublet is a mold breaker in the 6\" Refractor category. We have painstakingly engineered an optical and tube solution to bring you APM quality at an unheard price. The new 152-1200ED features a Doublet lens cell using ED glass equivalent to FPL-51 complimented by a Lanthanum  element to maximize performance. Our innovative combination of materials and design has resulted in optical performance far beyond the normal for a telescope of this price. As with all APM telescopes consistency is assured and each telescope goes through an interferometrical test at the 532nm (green) wavelength before shipping.\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cu\u003e\u003cb\u003e\u003cspan\u003eThe special feature of the 152 mm ED APO:\u003c\/span\u003e\u003c\/b\u003e\u003c\/u\u003e\u003cbr\u003e\u003c\/span\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eVery high quality processed and of convincingly good optical quality\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eColorless optics with FLP51 glass\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003ePrecise 3.7 \"focuser with 1:10 mirco reduction for heavy accessories\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eWith f \/ 7 ideal for visual and photographic purposes\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eCNC tube rings\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eCarry handle\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eVery good value for money\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003eWith a generous 1200mm focal length, the 152-1200 ED is an impressive all-rounder. From intricate double star observing to high contrast detailed planetary views, this new scope will introduce a whole new group of Astronomy enthusiasts to APM quality.\u003cbr\u003e\u003cbr\u003eThe new 152-1200ED is also supplied with extensive accessories. Inside the quality Aluminium transport case you will find not only a fantastic value telescope but also a newly designed 3,7\" focuser, CNC tube rings incorporating a carrying handle, 330mm Losmandy style dovetail and finder bracket.\u003cbr\u003e\u003cbr\u003eTraditional APM quality has been applied in all areas. The new 3,7\" focuser is a Rack and Pinion type, with 1:10 focusing. It remains rigid under high loads making it suitable for imaging. The attention to detail extends to areas like the 2\" and 1.25\" eyepiece adapters. These use a new design of collar clamp, far superior to the common brass compression rings found on lesser designs. Also new is our 2\" APM  Fast Lock adapter now .\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cspan\u003eAs optional photo accessory for the ED Apo 152 f\/1200 , we recommend our Riccardi Flattener APO Reducer 0.75xM82 (the focal length is reduced to 900mm at f \/ 5.9) or our Riccardi APO Flattener Model 2 for APO's. (please look recommended products)\u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003eWith the new 152-1200ED we believe we have created an Apochromatic Refractor of incomparable performance and value in its category.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eDelivery contains:\u003c\/b\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eOptical Tube\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1 Pair of Tuberings\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e3,7\" Focuser with 1:10 Microfocusing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2\"\/1,25\" del. adapter\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eShoe for Finderbracket\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCarrying Case\u003c\/li\u003e\n\u003cli\u003eAdapter M82 x 1 ID ( Backfokus 230 mm )\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdapter M82 x 1 OD to M68 x 1 ID\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdapter M68 x 1 OD to M63 x 1 ID\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdapter M63 x 1 OD to 2\" APM Fast Lock  ( backfocus 180 mm )\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003ca href=\"https:\/\/www.cloudynights.com\/articles\/cat\/user-reviews\/review-of-the-apm-152-ed-serial-number-245-r3175\"\u003eReview (Cloudy Night)\u003c\/a\u003e\u003c\/div\u003e\u003ci\u003e\u003c\/i\u003e\u003cbr\u003e\u003cbr\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eType of telescope:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eDoublet ED-Apochromat\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLens:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eDoublet ED Apo with FPL51 Element\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eColor:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eblack \/ white\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube material:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eAluminium\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eAperture:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e152 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal ratio:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003ef\/7.9\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal length:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e1200 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eCoating:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eBroadband Mulitcoated\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eResolution:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e0.76\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLimit value:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e12.7 mag\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eMax. useful visual power:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e300 x\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eBackfokus:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e180 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocuser:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e3.7\" R\u0026amp;P Focuser, Rotation 360°\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eConnection to eyepiece:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eM68, 2\" and 1.25\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eViewfinder:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003enone supplied\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube diameter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e156 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLength during observing:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e1220 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTransportation length:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e1020 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eDewcap diameter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e186 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eCase:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eyes\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eCase weight:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e26.4 lb\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTotal weight:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e55,66\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eEyepiece adapter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eto 2\" and 1.25\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube weight:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e25.6 lb incl. Tuberings and 3\" Dovetail, 20.6 lb Tube only without Caps\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"APM","offers":[{"title":"Default Title","offer_id":44967666155805,"sku":"APM-152-1200-FPL51\/La-D-3.7ZTA","price":5184.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/APM-152mm-F-8-FPL-51-Doublet-APO-Refractor-3-7-inch-ZTA-Focuser-1__58999.1600124049.1280.1280.jpg?v=1684345549"},{"product_id":"sharpstar-sca260-v2-260mm-f-5-super-cassegrain-astrograph","title":"SharpStar SCA260 V2 260mm f\/5 Super Cassegrain Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e260mm (10.2\") Aperture Aspherical Primary Mirror\u003c\/li\u003e\n\u003cli\u003e1300mm Focal Length at a fast f\/5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eMassive 80mm Corrected Image Circle for Large Format Sensors\u003c\/li\u003e\n\u003cli\u003eLightweight Carbon Fiber Tube Weighing 14.5kg\u003c\/li\u003e\n\u003cli\u003e3.35\" Rack and Pinion Focuser with 360° Rotator\u003c\/li\u003e\n\u003cli\u003e70mm Back Focus from the M48 Connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSharpStar SCA260 V2 260mm f\/5 Super Cassegrain Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe SharpStar SCA260 V2 is an imaging instrument designed for large-format sensors, combining a 260mm aspherical primary mirror and a fast f\/5 optical system to produce a massive 80mm corrected image circle. With a native focal length of 1300mm, it achieves a theoretical resolution of 0.46 arc-seconds, capable of capturing fine detail in distant galaxies. The entire optical tube assembly weighs only 14.5kg, making it manageable for a wide range of equatorial mounts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e260mm f\/5 Optics with an 80mm Corrected Image Circle\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the SCA260 V2 is a 260mm aspherical primary mirror made from PZ33, a Pyrex-like glass with excellent thermal stability. Paired with a three-element air-spaced corrector, this f\/5 system illuminates an enormous 80mm image circle, free of significant vignette or distortion. This makes the SCA260 V2 fully compatible with the largest professional CMOS and CCD sensors available, including those with diagonals exceeding 60mm.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAspherical Primary Mirror:\u003c\/strong\u003e Provides superior correction compared to standard spherical mirrors, critical for achieving sharp focus across the large imaging field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Aluminum Coatings:\u003c\/strong\u003e Both the primary and 120mm minor axis secondary mirror feature coatings that ensure high reflectivity for brighter images and reduced exposure times.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-Frame and Beyond:\u003c\/strong\u003e The 80mm image circle provides ample coverage for full-frame (43mm diagonal) sensors and larger medium-format chips without requiring a separate reducer or flattener.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e14.5kg Carbon Fiber Tube and Simplified Collimation\u003c\/h3\u003e\n\u003cp\u003eThe optical tube is constructed from carbon fiber, which provides a high stiffness-to-weight ratio and minimizes thermal expansion and contraction during long imaging sessions. This ensures focus remains stable as ambient temperatures change overnight. The total tube weight of 14.5kg places it within the payload capacity of many mid-to-high-end equatorial mounts.\u003c\/p\u003e\n\u003cp\u003eSharpStar has engineered the collimation mechanics for field accessibility. Unlike traditional Cassegrain designs that require complex adjustments, the SCA260 V2's optical alignment is primarily controlled by adjusting the secondary mirror's pull rod, simplifying the process of achieving perfect star shapes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e3.35\" Focuser with 70mm of Back Focus\u003c\/h3\u003e\n\u003cp\u003eThe SCA260 V2 is equipped with a heavy-duty 3.35\" rack and pinion focuser designed to carry professional imaging trains without flexure or slippage. The rear of the focuser includes a 360° rotator for effortless camera framing and a built-in 2-inch filter holder. It provides a generous 70mm of back focus distance from the M48x0.75 threaded connection, accommodating filter wheels, off-axis guiders, and other accessories.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple Connection Threads:\u003c\/strong\u003e The focuser terminates in a versatile adapter system with M68x1, M54x0.75, and M48x0.75 threads to connect to nearly any camera or accessory.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Rotator:\u003c\/strong\u003e Allows you to frame your target precisely without loosening the camera or introducing tilt into the optical train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Handlebar:\u003c\/strong\u003e The integrated handle is not just for carrying; it also serves as a mounting platform for guide scopes or other accessories, further streamlining your setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat imaging sensors can the SCA260 V2's 80mm image circle cover?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e80mm image circle\u003c\/strong\u003e of the SharpStar SCA260 V2 is large enough to fully illuminate professional-grade sensors, including full-frame (e.g., IMX455, 43mm diagonal) and medium-format sensors (e.g., IMX461, 55mm diagonal) with minimal vignetting. This makes it an ideal choice for creating large-scale mosaics and imaging wide fields of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the f\/5 focal ratio of the SCA260 V2 benefit deep-sky imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn \u003cstrong\u003ef\/5 focal ratio\u003c\/strong\u003e is considered fast for an astrograph of this aperture. It allows you to collect a significant amount of light in a shorter period compared to slower f\/8 or f\/10 systems. This reduces individual sub-exposure times, which can lessen the impact of tracking errors and changing atmospheric conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the PZ33 primary mirror material in the SCA260 V2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003ePZ33\u003c\/strong\u003e is a borosilicate glass with a very low coefficient of thermal expansion, similar to Pyrex. This means the mirror's shape remains stable as the temperature drops throughout the night, preventing the focal point from shifting. This thermal stability is critical for maintaining sharp focus during long-exposure astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I collimate the SharpStar SCA260 V2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SCA260 V2 features a simplified collimation system. The primary adjustment is made to the \u003cstrong\u003espherical secondary mirror\u003c\/strong\u003e using an integrated pull rod mechanism. This is generally more straightforward than adjusting both the primary and secondary mirrors on traditional Cassegrain telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I image the entire Veil Nebula (NGC 6960) with the SCA260 V2 and a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Veil Nebula complex spans approximately 3 degrees of the sky. With the SCA260 V2's \u003cstrong\u003e1300mm focal length\u003c\/strong\u003e and a full-frame sensor (like a Sony a7 series or ZWO ASI6200), you can capture large sections of the nebula in a single frame and create a high-resolution mosaic of the entire complex in just a few panes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat class of mount is required for the 14.5kg tube weight of the SCA260 V2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eGiven the \u003cstrong\u003e14.5kg tube weight\u003c\/strong\u003e, plus the additional weight of a camera, guide scope, and other accessories, a mount with a payload capacity of at least 25-30kg (55-66 lbs) is recommended for stable, long-exposure imaging. Mounts in the Sky-Watcher EQ8, iOptron CEM70\/CEM120, or equivalent class are appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e260mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Image Circle\u003c\/td\u003e\n\u003ctd\u003e80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Type\u003c\/td\u003e\n\u003ctd\u003eAspherical Reflector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Material\u003c\/td\u003e\n\u003ctd\u003ePZ33 (Pyrex-like)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Type\u003c\/td\u003e\n\u003ctd\u003eSpherical Reflector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Minor Axis\u003c\/td\u003e\n\u003ctd\u003e120mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector\u003c\/td\u003e\n\u003ctd\u003eThree-element air-spaced lens structure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3.35\" Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus (from M48 thread)\u003c\/td\u003e\n\u003ctd\u003e70mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon Fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e304mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e14.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.46 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Visual Magnitude\u003c\/td\u003e\n\u003ctd\u003e13.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSharpStar SCA260 V2 OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SharpStar Optics","offers":[{"title":"Default Title","offer_id":44967740866845,"sku":"SSO-SCA260V2","price":6461.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SharpStar-SCA260-1__12455.1608934024.1280.1280.jpg?v=1684345748"},{"product_id":"sharpstar-94edph-f-5-5-triplet-apo","title":"SharpStar 94EDPH f\/5.5 Triplet APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAperture: 94mm\u003c\/li\u003e\n\u003cli\u003eFocal Ratio: f\/5.5\u003c\/li\u003e\n\u003cli\u003eFocal Length: 517mm\u003c\/li\u003e\n\u003cli\u003eOptical Design: Triplet APO with Two ED Elements\u003c\/li\u003e\n\u003cli\u003eWeight: 3.3KG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSharpStar 94EDPH f\/5.5 Triplet APO\u003c\/h2\u003e\n\u003cp\u003eThe SharpStar 94EDPH f\/5.5 Triplet APO combines a 94mm aperture with a 517mm focal length in a lightweight 3.3KG optical tube assembly. Its air-spaced triplet objective, featuring two ED glass elements, achieves a theoretical resolution of 1.28 arc-seconds down to a limiting magnitude of 11.62, delivering high-contrast, color-pure images for discerning astrophotographers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e94mm f\/5.5 Triplet APO: Dual ED Glass for Aberration-Free Images\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the 94EDPH is an air-spaced triplet objective incorporating two pieces of extra-low dispersion (ED) glass. This design aggressively corrects chromatic aberration, eliminating the color fringing around bright stars that can soften images from lesser optics. The result is a sharp, high-contrast view with pinpoint stars across the field.\u003c\/p\u003e\n\u003cp\u003eThe native f\/5.5 focal ratio is fast enough for efficient deep-sky imaging, reducing required exposure times to capture faint details. This optical system is engineered to produce images where the only limit is the seeing conditions, resolving fine structures down to 1.28 arc-seconds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eField-Ready at 3.3KG: A Compact Grab-and-Go Astrograph\u003c\/h3\u003e\n\u003cp\u003eWeighing only 3.3KG and measuring just 468mm in length, the SharpStar 94EDPH is built for portability. Its low weight and compact size allow it to be carried securely by a wide range of mid-sized equatorial mounts, reducing the need for a heavy, observatory-class setup. This makes it an ideal choice for traveling to dark-sky sites.\u003c\/p\u003e\n\u003cp\u003eThe telescope includes a robust set of mounting hardware right out of the box. A pair of CNC-machined tube rings, a Vixen-style dovetail plate, and a sturdy carrying handle ensure the optical tube is secure and easy to manage, both on and off the mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e517mm Focal Length: Framing Nebulae and Galaxies at f\/5.5\u003c\/h3\u003e\n\u003cp\u003eThe 517mm focal length provides a versatile field of view that is perfectly suited for many of the most popular deep-sky targets. With a modern APS-C or Micro Four Thirds sensor, you can easily frame large objects like the Andromeda Galaxy (M31) or the entire North American Nebula (NGC 7000) in a single shot.\u003c\/p\u003e\n\u003cp\u003eFor imagers seeking an even wider and faster system, an optional dedicated reducer brings the focal ratio down to f\/4.4. This accessory transforms the 94EDPH into an exceptionally fast astrograph capable of illuminating full-frame sensors, making it possible to capture vast nebulae complexes and star fields with significantly shorter exposure times.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSharpStar 94EDPH vs. 80mm APOs: The Impact of 94mm Aperture\u003c\/h3\u003e\n\u003cp\u003eWhile 80mm refractors are a popular starting point, the 94mm aperture of the 94EDPH offers a significant step up in light-gathering power and resolution. This directly translates to brighter images, shorter sub-exposure times, and the ability to resolve finer details in galactic dust lanes and planetary nebulae.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Resolution:\u003c\/strong\u003e The 94EDPH resolves down to 1.28 arc-seconds, a noticeable improvement over the ~1.45 arc-second limit of a typical 80mm refractor, revealing more intricate structures in your targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreater Light Grasp:\u003c\/strong\u003e The larger 94mm objective collects substantially more photons per second than an 80mm lens. This allows you to capture faint, extended objects with better signal-to-noise ratio in the same amount of imaging time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintained Portability:\u003c\/strong\u003e Despite its larger aperture, the 94EDPH remains highly portable at just 3.3KG, occupying a similar weight class to many fully-equipped 80mm imaging setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of objects is the SharpStar 94EDPH best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SharpStar 94EDPH excels at imaging medium to large deep-sky objects. Its \u003cstrong\u003e517mm focal length\u003c\/strong\u003e provides an ideal field of view for targets like the Andromeda Galaxy (M31), the Orion Nebula (M42), the North American Nebula (NGC 7000), and large open star clusters like the Pleiades (M45).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need the optional reducer for the SharpStar 94EDPH?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe optional reducer is recommended if you plan to use a \u003cstrong\u003efull-frame camera\u003c\/strong\u003e or want to capture very large targets in a single frame. It also speeds up the optical system to f\/4.4, reducing exposure times. For cameras with APS-C or smaller sensors, the native \u003cstrong\u003ef\/5.5 focal ratio\u003c\/strong\u003e and 517mm focal length are excellent for a wide range of nebulae and galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat size mount do I need for the SharpStar 94EDPH?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a bare optical tube weight of only \u003cstrong\u003e3.3KG\u003c\/strong\u003e, the 94EDPH is not demanding. For astrophotography, a mid-sized equatorial mount with a payload capacity of around 30 lbs (13.6 kg), such as a Sky-Watcher HEQ5 or iOptron CEM26, is a perfect match and will provide stable, accurate tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SharpStar 94EDPH good for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The triplet apochromatic objective with two ED elements delivers sharp, high-contrast, and color-free views. It performs beautifully as a rich-field telescope for sweeping the Milky Way, observing open clusters, and viewing larger nebulae with appropriate filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the SharpStar 94EDPH frame the Andromeda Galaxy (M31) with an APS-C sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 517mm focal length is an excellent match for framing the Andromeda Galaxy on a typical APS-C sensor. You will be able to capture the bright galactic core, its extensive dust lanes, and its two main satellite galaxies, M32 and M110, all within a single, well-composed frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SharpStar 94EDPH for high-resolution planetary imaging on Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the 94EDPH is primarily a wide-field instrument, it can be used for planetary viewing and imaging. Its \u003cstrong\u003e1.28 arc-second resolution\u003c\/strong\u003e is capable of revealing details like cloud bands on Jupiter and the Cassini Division in Saturn's rings. For imaging, you will need to add a high-quality 3x or 5x Barlow lens to increase the image scale sufficiently for a planetary camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e94mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e517mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens Design\u003c\/td\u003e\n\u003ctd\u003eTriplet air-spaced APO (two ED glass elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e1.28 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e11.62\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e468mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Diameter\u003c\/td\u003e\n\u003ctd\u003e118mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e3.3KG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDovetail Plate\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHandle\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSharpStar\/Askar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SharpStar Optics","offers":[{"title":"Default Title","offer_id":44967741128989,"sku":"SSO-94EDPH","price":2303.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SharpStar-94EDPH-1__34426.1650566400.1280.1280.jpg?v=1684345758"},{"product_id":"sharpstar-100qii-f-5-8-quadruplet-apo","title":"SharpStar 100QII f\/5.8 Quadruplet APO","description":"\u003c!-- more --\u003e\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan\u003eCompare with the first generation products, it has the following features:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e1 The optical design has changed, in addition to the original F5.8 focal ratio, F4.3 full-frame reducer lens can be used.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e2. The appearance becomes more stylish and streamlined.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e3. Change of focuser: use 3.2-inch focuser, plus a 360-degree rear CAA, and the angle adjuster.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e4. Add a nice-looking and practical handle.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePRODUCT DETAILS：\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFeatures of SharpStar 100Q ED APO refractor: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e•100MM f\/5.8 quartette doublet air-spaced optical design\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e•Includes one special ED lens\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e•Brand-new 3.2\" dual-speed rack and pinion focuser, 10:1 fine focus\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e•2\" and 1.25\" universal interfaces, M82 thread interface, M82 screw M48 photographic taper interface (sold separate)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e•Angle adjuster for 360 degree rotation\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e•Universal (Vixen-style) dovetail bar with tube rings\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e•Push-fit drawtube Dew-shield is provided with slidelock\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e•Add finderscope mounting devotail interface\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eSHARPSTAR 100QII ED APO apochromatic refractor tube features a quartette doublet air-space design that includes one special ED lens and the full-surface multi-coated is adopted. The quartette optical design makes SHARPSTAR 100QII an excellent imaging and observing performance. The image circle of not less than 44mm makes the 100QII a good match to any full-frame camera, giving you unparalleled shooting quality. The use of special ED glass offers excellent chromatic aberration control, not only reflected in high quality imaging, but takes observation with the 100QII into a new realm. No matter its sharpness, contrast, or chromatic aberration control, it has quite excellent performance.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eSHARPSTAR 100QI ED APO provides a wonderful observing and astrophotography system thanks to the proper focal ratio. The unique quartette design incorporates special ED APO lens for excellent chromatic aberration control, sharp stars and overall sharper images.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eSHARPSTAR 100QII ED APO also offers an impressive focusing system while providing an excellent optical system. SHARPSTAR 100QII ED APO has a two-speed 3-inch rack and pinion focuser with 1:10 focusing ratio. Compared with many refractors on the market, the use of a rack and pinion focuser offers larger payload and a stronger hold, so that your focuser will not slip when using heavy-duty observation accessories or camera. Worried about being out of focus or badly framed image? The 360-degree rotator allows you to easily rotate the shooting angle and correct the framing to your own satisfaction. More importantly, its 3-inch focusing tube is more robust and more stable than most commercially available 3-inch focusing tubes. It also provides good upgrades for heavy-duty accessories such as large-caliber field flatteners.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eIn addition, the newly improved load-bearing adjustment screw on the body of the focuser lets you to adjust your focuser according to the weight of the attachment.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_SharpStar_100QII_Backfocus.jpg?v=1684345733\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_SharpStar_100QII_Dimensions.jpg?v=1684345735\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_SharpStar_100QII_Spot.jpg?v=1684345736\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_SharpStar_94EDPH_Dimensions.jpg?v=1684345729\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_SharpStar_94EDPH_Spot.jpg?v=1684345731\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003cp\u003eAperture: 100mm\u003cbr\u003eFocal Length: 580mm\u003cbr\u003eLimiting star magnitude: 11.8\u003cbr\u003eFocal ratio: F5.8\u003cbr\u003eResolution：1.16 arc seconds\u003cbr\u003eTube length: 508mm (dew-shield indended), 600mm (dew-shield extended)\u003cbr\u003eAccessories: A piece of tube ring, a dovetail plate, a handle\u003cbr\u003eMain tube outer diameter: 114mm\u003cbr\u003eOTA Weight: 4.3k\u003cbr\u003eTotal Weight (with rings, dovetail plate and handle): 5.2kg\u003cbr\u003eObjective type: Quadruplet air-spaced APO\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SharpStar Optics","offers":[{"title":"Default Title","offer_id":44967741292829,"sku":"SSO-100QII","price":3339.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SharpStar-100QII-1__41727.1609003092.1280.1280.jpg?v=1684345753"},{"product_id":"sharpstar-121sdq-f-5-6-quintuplet-apo","title":"SharpStar 121SDQ f\/5.6 Quintuplet APO","description":"\u003c!-- more --\u003e\u003cdiv\u003e\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cspan\u003eThis product is a new generation of independent design of quintuple air-spaced high quality refractor telescope which take the form of dual after triplet. One of the triplet lens is ultra-low dispersion ED glass, which fully optimizes the function of photography, the range of image can reach the 60mm influence circle of medium frame, and the image peripheral dimming control is excellent. For most amateur astronomer it will be the device of choice for astrophotography.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eConsidering the importance of photographic focal plane, this product leaves 145mm space for the connection of professional high performance imaging equipment and accessories.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThe 4-inch large focuser is belong to domestic initiation, the abundant threaded interface makes it easy for various joints and accessories\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThis product is a beautiful, fashion style professional design and manufacturing to bring good product experience.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_SharpStar_121SDQ_Dimensions.jpg?v=1684345739\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_SharpStar_121SDQ_Spots.jpg?v=1684345741\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003cp\u003eAperture: 121mm\u003cbr\u003eFocal Length: 678mm\u003cbr\u003eLimiting star magnitude: 12.1\u003cbr\u003eFocal ratio: F5.6\u003cbr\u003eResolution：0.97 arc seconds\u003cbr\u003eTube length: 598mm (dew-shield indended), 698mm (dew-shield extended)\u003cbr\u003eAccessories: A piece of tube ring, a dovetail plate, a handle\u003cbr\u003eMain tube outer diameter: 130mm\u003cbr\u003eNet Weight: 7.98kg\u003cbr\u003eObjective type: Quintuplet air-spaced APO\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SharpStar Optics","offers":[{"title":"Default Title","offer_id":44967742210333,"sku":"SSO-121SDQ","price":5319.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SharpStar-121SDQ-1__19472.1609006233.1280.1280.jpg?v=1684345756"},{"product_id":"sharpstar-140ph-f-6-5-triplet-apo","title":"SharpStar 140PH f\/6.5 Triplet APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e140mm Aperture\u003c\/li\u003e\n\u003cli\u003e910mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/6.5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eTriplet Air-Spaced APO Objective with Two ED Elements\u003c\/li\u003e\n\u003cli\u003e0.83 arc-seconds Resolution\u003c\/li\u003e\n\u003cli\u003e10.1kg Net Weight\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSharpStar 140PH f\/6.5 Triplet APO\u003c\/h2\u003e\n\u003cp\u003eThe SharpStar 140PH delivers exceptional apochromatic imaging with a 140mm aperture and a 910mm focal length. Its f\/6.5 triplet objective incorporates two ED glass elements to achieve a theoretical resolution of 0.83 arc-seconds with virtually zero chromatic aberration. The optical tube assembly (OTA) has a net weight of 10.1kg and measures a transportable 738.6mm with its dew shield retracted, reaching down to a limiting magnitude of 11.5 for both visual and photographic pursuits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e140mm Triplet APO Optics with Dual ED Glass\u003c\/h3\u003e\n\u003cp\u003eAt the core of the 140PH is an air-spaced triplet objective featuring two pieces of extra-low dispersion (ED) glass. This dual-ED design provides a level of color correction superior to standard doublet or single-ED triplet systems, ensuring stars are sharp, high-contrast points of light without distracting purple fringing. This allows the 140mm objective to perform at its theoretical limit, resolving details down to 0.83 arc-seconds under ideal conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Aberration Control:\u003c\/strong\u003e The use of two ED elements significantly suppresses chromatic aberration, delivering true-to-life star colors and enhancing contrast on subtle planetary and deep-sky details.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Contrast Views:\u003c\/strong\u003e By focusing all wavelengths of light to a single point, the image is sharper and the sky background appears darker, making faint structures in nebulae and galaxies easier to discern.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e10.1kg OTA with a 738.6mm Retracted Length\u003c\/h3\u003e\n\u003cp\u003eEngineered for stability and field use, the SharpStar 140PH features a robust mechanical build with a net weight of 10.1kg. The main tube has an outer diameter of 148mm and retracts to a length of just 738.6mm, making it manageable for transport and setup. The gross weight, including the supplied tube rings, dovetail plate, and handle, is 11.7kg, requiring a medium-class equatorial mount for stable imaging.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable Dew Shield:\u003c\/strong\u003e Helps prevent moisture from forming on the objective lens during long nights and blocks stray light from entering the optical path.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Mounting Hardware:\u003c\/strong\u003e Comes ready to mount with a matched pair of tube rings, a universal Vixen\/Losmandy-style dovetail plate, and a rigid carrying handle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFull-Frame Astrograph at f\/6.5\u003c\/h3\u003e\n\u003cp\u003eThe 140PH is designed as a premium astrograph with its native f\/6.5 focal ratio providing an excellent balance between image scale and brightness. The 910mm focal length is ideal for framing medium-to-large deep-sky objects like the Andromeda Galaxy (M31) or the Orion Nebula (M42) on full-frame sensors. For imagers seeking a wider field or faster acquisition, an optional 0.73x reducer transforms the scope into a fast f\/4.8 system, significantly cutting down exposure times.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual and Photographic Versatility:\u003c\/strong\u003e While optimized for imaging, the superb optics also make the 140PH a powerful visual instrument, capable of reaching a limiting magnitude of 11.5.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Speed Reduction:\u003c\/strong\u003e The availability of a dedicated reducer adds flexibility, allowing you to adapt the telescope's focal ratio to your specific target and imaging conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the SharpStar 140PH's dual ED glass objective special?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe triplet objective in the SharpStar 140PH uses \u003cstrong\u003etwo ED (Extra-low Dispersion) glass elements\u003c\/strong\u003e instead of the more common single element. This provides a higher degree of color correction, virtually eliminating chromatic aberration (false color fringing) for sharper stars, higher contrast, and more accurate color rendition in astrophotos.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SharpStar 140PH portable for field use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile not a lightweight \"grab-and-go\" scope, the 140PH is designed to be transportable. Its \u003cstrong\u003enet weight is 10.1kg\u003c\/strong\u003e and it has a retracted length of \u003cstrong\u003e738.6mm\u003c\/strong\u003e, allowing it to fit in most vehicles. It requires a stable equatorial mount capable of handling the 11.7kg gross weight with accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SharpStar 140PH perform on planetary targets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SharpStar 140PH excels at high-resolution planetary viewing and imaging. Its \u003cstrong\u003e140mm aperture\u003c\/strong\u003e and apochromatic optics deliver high-contrast, color-pure images, allowing you to resolve fine details like the cloud bands of Jupiter and the Cassini Division in Saturn's rings, approaching its theoretical \u003cstrong\u003e0.83 arc-second resolution\u003c\/strong\u003e limit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is needed for the SharpStar 140PH?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor stable astrophotography, you will need a robust equatorial mount with a payload capacity of at least 15-20kg (33-44 lbs). This ensures the mount can comfortably handle the \u003cstrong\u003e11.7kg gross weight\u003c\/strong\u003e of the telescope plus any additional cameras, guide scopes, and other accessories without compromising tracking accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the SharpStar 140PH be used for visual astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While designed as an astrograph, its premium optics provide stunning visual views. With a \u003cstrong\u003elimiting magnitude of 11.5\u003c\/strong\u003e, it can reveal faint deep-sky objects, and its high-contrast, color-free performance makes it an excellent instrument for observing the Moon, planets, and bright double stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of using the optional reducer with the SharpStar 140PH for imaging the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Andromeda Galaxy is a large target. At the native \u003cstrong\u003ef\/6.5\u003c\/strong\u003e focal ratio, you get a detailed view of its core. By adding the optional 0.73x reducer, you change the focal ratio to a much faster f\/4.8. This provides two benefits: it widens the field of view to better frame the entire galaxy and its spiral arms, and it reduces required exposure times by more than 40%.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture Size\u003c\/td\u003e\n\u003ctd\u003e140mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e910mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eTriplet air-spaced APO (including two ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.83 arc-seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e11.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Tube Length (Retracted)\u003c\/td\u003e\n\u003ctd\u003e738.6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain Tube Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e148mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e10.1kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e11.7kg (Including tube ring, dovetail plate and handle)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eA Pair of specialized tube ring\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eA universal dovetail\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eA handle\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SharpStar_140PH_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSharpStar\/Askar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SharpStar Optics","offers":[{"title":"Default Title","offer_id":44967742406941,"sku":"SSO-140PH","price":6159.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SharpStar-140PH-1__93181.1609007115.1280.1280.jpg?v=1684345761"},{"product_id":"sharpstar-150mm-f-2-8-hnt-hyperbolic-newtonian-astrograph","title":"SharpStar 150mm f\/2.8 HNT Hyperbolic Newtonian Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAperture: 150mm\u003c\/li\u003e\n\u003cli\u003eFocal Ratio: f\/2.8\u003c\/li\u003e\n\u003cli\u003eImage Circle: 44mm\u003c\/li\u003e\n\u003cli\u003eGross Weight: 6 kg\u003c\/li\u003e\n\u003cli\u003eBack-Focus: 55mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSharpStar 150mm f\/2.8 HNT Hyperbolic Newtonian Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe SharpStar 150mm f\/2.8 HNT Hyperbolic Newtonian Astrograph is an imaging instrument engineered for speed, delivering a 420mm focal length at an exceptionally fast f\/2.8 focal ratio. Its 150mm hyperbolic primary mirror and integrated corrector produce a flat, fully illuminated 44mm image circle, covering full-frame sensors with a vast 6-degree field of view. The entire system, including the tube ring and dovetail plate, weighs just 6kg, making it a portable solution for wide-field deep-sky astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e150mm f\/2.8 Hyperbolic Optics: A 44mm Flat-Field System\u003c\/h3\u003e\n\u003cp\u003eThe optical core of the 150HNT is its 150mm hyperbolic primary mirror, which achieves a native f\/2.8 focal ratio. Unlike a standard parabolic mirror, a hyperbolic figure is designed to work as part of a system with a dedicated corrector, enabling superior off-axis correction across a large 44mm image circle. The primary mirror is made from PZ33, a low-expansion Pyrex-type glass that ensures thermal stability as ambient temperatures change.\u003c\/p\u003e\n\u003cp\u003eBoth the primary and 70mm secondary mirrors feature enhanced aluminum coatings, guaranteeing light reflectivity of over 96%. This high throughput, combined with the fast focal ratio, allows you to capture faint details with significantly shorter exposure times, maximizing the data collected during clear nights.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntegrated 3-Element Corrector for a 6° Field of View\u003c\/h3\u003e\n\u003cp\u003eTo deliver its expansive 6-degree field of view, the 150HNT incorporates a three-element, air-spaced corrector directly into the focuser assembly. This design, which includes one ED (Extra-low Dispersion) glass element, is optimized specifically for the hyperbolic primary, eliminating coma and ensuring pinpoint stars to the edge of a full-frame sensor. By integrating the corrector, the system removes the complexity of matching a third-party coma corrector and guarantees the specified 55mm back-focus distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRigid 2-Speed Focuser for Precise Control\u003c\/h3\u003e\n\u003cp\u003eAn astrograph's focuser must be rigid enough to carry a modern imaging train without flexure. The 150HNT is equipped with a dual-speed rack-and-pinion focuser capable of supporting a 3kg payload. The focuser includes a built-in camera rotator for effortless framing and is compatible with most electronic auto-focusers.\u003c\/p\u003e\n\u003cp\u003eMechanical stability is reinforced throughout the optical tube. The CNC-machined secondary mirror support is a single, rigid piece designed to prevent misalignment and produce clean, sharp diffraction spikes. The primary mirror cell features three sets of adjustment screws for precise and stable collimation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAstrograph-Ready Build: 6 kg Total Weight with Rings \u0026amp; Plate\u003c\/h3\u003e\n\u003cp\u003eDesigned for portability and rapid deployment, the SharpStar 150HNT has a total weight of just 6kg, including its tube rings and a 200mm Losmandy-style dovetail plate. The compact 443mm tube length makes it easy to balance on a wide range of equatorial mounts. The package also includes a 200mm handle bar that adds rigidity and provides a convenient mounting point for guide scopes or other accessories via its integrated finder base.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSharpStar 15028HNT vs. Standard 6\" f\/4 Newtonians: Speed and Correction\u003c\/h3\u003e\n\u003cp\u003eWhile a standard 6\" f\/4 Newtonian is a capable imaging instrument, the SharpStar 150HNT is purpose-built for a higher tier of astrophotography. The primary differences lie in optical speed and field correction.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExposure Time:\u003c\/strong\u003e At f\/2.8, the 150HNT gathers light approximately twice as fast as an f\/4 system. This means a 5-minute exposure on the 150HNT collects the same signal as a 10-minute exposure on an f\/4 scope, effectively doubling your imaging efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Correction:\u003c\/strong\u003e The 150HNT's hyperbolic mirror and built-in corrector are designed as a single optical system to produce a flat 44mm field. A standard f\/4 Newtonian requires a separate, often generic, coma corrector that may not fully correct the field or illuminate a full-frame sensor without vignetting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Design:\u003c\/strong\u003e The hyperbolic design allows for sharper stars at the edge of the field compared to what a standard parabolic mirror and separate corrector can typically achieve, especially on large sensors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the SharpStar 150mm HNT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a gross weight of \u003cstrong\u003e6kg\u003c\/strong\u003e (including rings and dovetail), the SharpStar 150HNT is well-suited for mid-range equatorial mounts. For optimal tracking and guiding, a mount in the payload class of a Sky-Watcher HEQ5, iOptron CEM26, or larger is recommended, especially once a camera and guide scope are added.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of a hyperbolic primary mirror in the 150mm HNT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA hyperbolic mirror is part of a more advanced optical design than the parabolic mirrors found in standard Newtonians. It is specifically figured to work in tandem with the built-in \u003cstrong\u003ethree-element corrector\u003c\/strong\u003e to achieve a wider, flatter, and better-corrected field of view across its \u003cstrong\u003e44mm image circle\u003c\/strong\u003e than a parabolic mirror with a separate, general-purpose coma corrector.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I set the correct 55mm back-focus for my camera with the SharpStar 150mm HNT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe standard \u003cstrong\u003e55mm back-focus\u003c\/strong\u003e is measured from the base of the M48x0.75 male thread on the focuser's camera rotator. To achieve this distance, you will use a combination of extension tubes and adapters, such as an M48 T-ring for your DSLR or a set of spacers for a dedicated astronomy camera, to place your camera's sensor at the correct distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the SharpStar 150mm HNT frame large targets like the North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SharpStar 150HNT is ideal for such targets. With its \u003cstrong\u003e420mm focal length\u003c\/strong\u003e and \u003cstrong\u003e6-degree field of view\u003c\/strong\u003e on a full-frame sensor, it can easily capture the entirety of the North American Nebula (NGC 7000) and the neighboring Pelican Nebula (IC 5070) in a single, richly detailed frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SharpStar 150mm HNT suitable for imaging small galaxies like the Whirlpool Galaxy (M51)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the 150HNT can certainly image the Whirlpool Galaxy (M51), its wide \u003cstrong\u003e420mm focal length\u003c\/strong\u003e is optimized for large nebulae and star fields. M51 will appear relatively small in the frame. The astrograph's strength is capturing such galaxies within the context of their surrounding galactic cirrus and stellar environment, rather than for high-magnification detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use an electronic autofocuser (EAF) with the SharpStar 150mm HNT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The dual-speed rack-and-pinion focuser on the 150HNT is designed to be compatible with most common electronic auto-focusers (EAFs). This allows for precise, automated focusing which is critical for a fast f\/2.8 system where the critical focus zone is very narrow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture Size\u003c\/td\u003e\n\u003ctd\u003e150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e420mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/2.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField of View\u003c\/td\u003e\n\u003ctd\u003e6 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack-Focus\u003c\/td\u003e\n\u003ctd\u003e55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Type\u003c\/td\u003e\n\u003ctd\u003eHyperbolic reflective mirror\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Material\u003c\/td\u003e\n\u003ctd\u003ePZ33 (Pyrex-type glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector\u003c\/td\u003e\n\u003ctd\u003eThree-element air-spaced (inc. one ED element)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Minor Axis\u003c\/td\u003e\n\u003ctd\u003e70mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.77 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Visual Magnitude\u003c\/td\u003e\n\u003ctd\u003e12.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e4.8kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e6kg (including tube ring and dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain Tube Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain Tube Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e193mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain Tube Length\u003c\/td\u003e\n\u003ctd\u003e443mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SharpStar_15028HNT-AL_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software \u0026amp; Drivers\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SharpStar Optics","offers":[{"title":"Default Title","offer_id":44967747715357,"sku":"SSO-15028HNT-AL","price":2765.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SSO-15028HNT-AL.png?v=1755111762"},{"product_id":"sharpstar-200mm-f-3-2-pnt-parabolic-newtonian-astrograph","title":"SharpStar 200mm f\/3.2 PNT Parabolic Newtonian Astrograph","description":"\u003c!-- more --\u003e\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cspan\u003eSHARPSTAR's newly developed ultra-short focal ratio paraboloid Newtonian reflector 20032PNT was launched, which filled a domestic gap in this field. The focal ratio of the whole system reached F3.2 by using a 200mmF3.8 paraboloid, a 90mm plane secondary mirror of short axis, and a 3-inch quartette 0.85 times error correction mirror, has been leading in the domestic market of similar products. Carbon fiber main tube is light, durable and so elegant appearance, which uses Pyrex materials is more stable than conventional reflective materials.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  The primary and secondary mirrors are all made of reinforced aluminum coating, and the reflectivity is ensured to be above 96%. The secondary mirror cross is formed once to ensure firm and not deformed. 3-inch special geared focuser device to ensure the attachment when shooting without slipping, and smooth operation.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  The whole CNC aluminum parts and hollow out type tube ring, the novel handle will improve the appearance and mechanical quality to a new height, making the overall look more close to the needs of enthusiasts.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e  The optical path also contains a quartette image-field correction mirror, which, in combination with the system, ensures full field photography and excellent peripheral reduction control, easy access to most of the imaging terminals on the market and perfect focusing with the M54×0.75 threaded at the end of the focuser and the 55mm focal plane (M48×0.75 thread with 52mm rear focal length).\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_SharpStar_20032PNT_Spot.jpg?v=1684345756\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_SharpStar_20032PNT_Dimensions_1.jpg?v=1684345757\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_SharpStar_20032PNT_Dimensions_2.jpg?v=1684345758\" alt=\"\" width=\"1028\" height=\"665\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003cp\u003eAperture: 200mm\u003cbr\u003eFocal Length: 760mm\u003cbr\u003eFocal Ratio: f\/3.8\u003cbr\u003ePrimary Mirror Type: Paraboloid\u003cbr\u003eMirror Material: PZ33 (similar as Pyrex glass)\u003cbr\u003eCorrector Type: Quartette air spaced\u003cbr\u003eSystem Focal Length\/ ratio: 640mm\/3.2\u003cbr\u003eShort axis diameter of secondary mirror: 90mm\u003cbr\u003eFully illuminated image circle: 44mm\u003cbr\u003eActual field: 3.76° (complete)\u003cbr\u003eMain tube material: Carbon fiber\u003cbr\u003eMain tube outer diameter: 280.5mm\u003cbr\u003eTotal length of telescope: 633m\u003cbr\u003eNet weight: 8kg\u003cbr\u003eGross weight: 9.46kg (including tube cap, handle, tube rings and dovetail plate)\u003cbr\u003eResolution: 0.6 arc-seconds\u003cbr\u003eFocuser: 3\" precision Focuser\u003cbr\u003eVisual Limiting Star Magnitude: 13.2\u003cbr\u003eFocal plane: 55mm (start from the end face of M54 thread)\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SharpStar Optics","offers":[{"title":"Default Title","offer_id":44967748862237,"sku":"SSO-20032PNT","price":4193.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SharpStar-20032PNT-1__57523.1609100072.1280.1280.jpg?v=1684345775"},{"product_id":"askar-fra400-72mm-f-5-6-quintuplet-apo","title":"Askar FRA400 72mm f\/5.6 Quintuplet APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e72mm Aperture Quintuplet APO Lens\u003c\/li\u003e\n\u003cli\u003e400mm Focal Length at f\/5.6\u003c\/li\u003e\n\u003cli\u003e44mm Full-Frame Image Circle\u003c\/li\u003e\n\u003cli\u003e140mm Available Back Focus\u003c\/li\u003e\n\u003cli\u003e3\" Rack-and-Pinion Focuser with 360° Rotator\u003c\/li\u003e\n\u003cli\u003e2.88kg Total Weight with Rings and Plate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAskar FRA400 72mm f\/5.6 Quintuplet APO Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar FRA400 is a portable imaging instrument designed around a 72mm f\/5.6 quintuplet objective that delivers a natively flat 44mm image circle without requiring an external flattener. Its 400mm focal length provides an ideal image scale for large nebulae and star fields, while the entire optical tube assembly weighs just 2.56kg. With a generous 140mm of back focus and a total weight of 2.88kg including its mounting hardware, this Flat-field Refractive Astrograph (FRA) is engineered for full-frame imaging from the moment you take it out of the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eQuintuplet Optics: A 44mm Flat Field with Zero Hassle\u003c\/h3\u003e\n\u003cp\u003eThe core of the FRA400 is its 5-element Petzval-like optical design, which incorporates two ED glass elements to achieve apochromatic color correction. This design corrects for field curvature internally, eliminating the need to purchase and correctly space a separate field flattener. The result is a 44mm image circle, fully illuminating full-frame sensors with sharp, pinpoint stars from edge to edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging Mechanics: 3\" Focuser and 360° Rotator\u003c\/h3\u003e\n\u003cp\u003eBuilt for modern astrophotography, the FRA400 features a robust 3-inch rack-and-pinion focuser that can handle heavy imaging trains without flexure or slippage. A 360-degree rotator allows for precise framing of your target without disturbing focus, while a fine-focus knob enables critical adjustments. The entire assembly, measuring just 317mm with its dew shield retracted, is built for stability and portability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e140mm Back Focus: Room for Any Imaging Train\u003c\/h3\u003e\n\u003cp\u003eOne of the FRA400's most significant advantages is its 140mm of available back focus, measured from the M68x1 male thread on the rotator. This extensive travel provides ample room to accommodate complex imaging setups, including filter wheels, off-axis guiders, and rotators. Askar includes a conical M68-M48 adapter, as well as 2-inch and 1.25-inch adapters, ensuring compatibility with virtually any camera or accessory right out of the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"FRA\" mean for the Askar FRA400?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eFRA\u003c\/strong\u003e stands for \u003cstrong\u003eF\u003c\/strong\u003elat-field \u003cstrong\u003eR\u003c\/strong\u003eefractive \u003cstrong\u003eA\u003c\/strong\u003estrograph. This means the Askar FRA400 is designed with a built-in optical element that corrects for field curvature, so you do not need a separate field flattener. It produces a flat, sharp image across its entire 44mm image circle natively.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to buy a separate field flattener for the Askar FRA400?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The quintuplet (5-element) objective lens design provides a corrected 44mm image circle without any additional accessories. You can attach your full-frame or smaller camera directly and achieve sharp stars across the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Askar FRA400's 44mm image circle work with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA standard full-frame sensor has a diagonal of approximately 43.3mm. The Askar FRA400's specified \u003cstrong\u003e44mm image circle\u003c\/strong\u003e fully illuminates these sensors, preventing vignetting (darkening of the corners) and ensuring your entire frame is usable for imaging large targets like the Andromeda Galaxy (M31) or the Veil Nebula complex.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar FRA400 suitable for a portable \"grab-and-go\" setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With an optical tube weight of \u003cstrong\u003e2.56kg\u003c\/strong\u003e and a total weight of \u003cstrong\u003e2.88kg\u003c\/strong\u003e with rings and dovetail, the Askar FRA400 is extremely lightweight. Its compact 317mm length makes it easy to transport and mount on lighter-duty equatorial mounts, making it an excellent choice for field imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the 140mm back focus on the Askar FRA400?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e140mm back focus\u003c\/strong\u003e provides extensive space for accessories. This is critical for imagers who use:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Wheels:\u003c\/strong\u003e Easily fits large filter wheels for LRGB or narrowband imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOff-Axis Guiders (OAGs):\u003c\/strong\u003e Provides enough room to place an OAG in the optical path for precise guiding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotators:\u003c\/strong\u003e Accommodates electronic rotators for automated framing.\u003c\/li\u003e\n\u003c\/ul\u003e\nThis flexibility allows you to build a sophisticated imaging train without worrying about running out of focus travel.\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar FRA400 for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While designed as an astrograph, the Askar FRA400 performs very well for visual use. The included 2\" and 1.25\" adapters allow you to use standard diagonals and eyepieces for wide-field views of star clusters and nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e72mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eQuintuplet dual ED air-spaced APO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e140mm (from M68x1 thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Length\u003c\/td\u003e\n\u003ctd\u003e317mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e2.56kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Weight (with rings \u0026amp; plate)\u003c\/td\u003e\n\u003ctd\u003e2.88kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Adapters\u003c\/td\u003e\n\u003ctd\u003eM68x1 Male Thread, 2\" Adapter, 1.25\" Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAskar FRA400 OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCarry Handle\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDovetail Plate\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eM68-M48 Conical Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInspection List\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eManual\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar_FRA400C_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44967765082397,"sku":"ASK-FRA400","price":1679.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Askar-FRA400-1__17210.1610295680.1280.1280.jpg?v=1684345825"},{"product_id":"askar-fra600-108mm-f-5-6-quintuplet-apo","title":"Askar FRA600 108mm f\/5.6 Quintuplet APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e108mm Aperture\u003c\/li\u003e\n\u003cli\u003e600mm Focal Length (f\/5.6)\u003c\/li\u003e\n\u003cli\u003eQuintuplet Flat-Field APO Optical Design\u003c\/li\u003e\n\u003cli\u003e66mm Corrected Image Circle\u003c\/li\u003e\n\u003cli\u003eTotal Weight of 6.5kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAskar FRA600 108mm f\/5.6 Quintuplet APO Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar FRA600 is a purpose-built astrograph featuring a 108mm quintuplet objective that delivers a massive 66mm flat-field image circle at a native f\/5.6 focal ratio. Its Petzval design, incorporating two ED glass elements, requires no separate flattener, providing pinpoint stars across the largest camera sensors from a compact 493mm optical tube. With a total instrument weight of 6.5kg and an expansive 160mm of back focus, the FRA600 is engineered for serious wide-field imagers who demand optical correction and mechanical stability in a single, integrated package.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eQuintuplet Petzval Optics: A 66mm Flat-Field Image Circle\u003c\/h3\u003e\n\u003cp\u003eThe core of the FRA600 is its 5-element (quintuplet) optical system. This advanced Petzval design uses a front triplet and a rear doublet, including two ED elements, to achieve a high degree of apochromatic correction. The result is a 600mm focal length system that produces a 66mm image circle, fully illuminating and correcting for field curvature on sensors far larger than the APS-C format, including full-frame and medium-format chips.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in Flattener:\u003c\/strong\u003e Unlike traditional refractors that require a separate, correctly-spaced flattener, the FRA600's correction is integral to the design. This eliminates a common source of tilt and spacing errors in the imaging train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApochromatic Correction:\u003c\/strong\u003e The inclusion of two ED (Extra-low Dispersion) glass elements minimizes chromatic aberration, ensuring that stars are tight, high-contrast points without distracting purple or green fringing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Illumination:\u003c\/strong\u003e The rear lens group is intentionally oversized to reduce vignetting and maintain even field illumination out to the edge of the 66mm circle, critical for producing clean, gradent-free images.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Portable 493mm Design with a 6.5kg Payload\u003c\/h3\u003e\n\u003cp\u003eEngineered for both backyard and field use, the FRA600 packs its 108mm aperture into a surprisingly compact and manageable form factor. With its dew shield retracted, the optical tube measures just 493mm in length, making it easy to transport and mount. The total weight, including the supplied tube rings and dovetail, is only 6.5kg, placing it well within the capacity of many modern portable equatorial mounts.\u003c\/p\u003e\n\u003cp\u003eA robust rack-and-pinion focuser provides the rigidity needed to carry heavy imaging trains without slipping or flexure. The focuser features a 1:10 micro-adjustment knob for precise critical focus, a 360-degree rotator for camera framing, and a series of threaded adapters to ensure a solid connection to your equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e160mm Back Focus and a Multi-Thread Adapter System\u003c\/h3\u003e\n\u003cp\u003eThe FRA600 provides a generous 160mm of back focus measured from the M90x1 thread on the focuser rotator. This ample distance accommodates complex imaging setups, including off-axis guiders, filter wheels, and rotators. To simplify connections, Askar includes a conical adapter that provides M68x1, M54x0.75, and M48x0.75 male threads, covering the most common standards for flatteners, cameras, and other accessories.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Threaded Connections:\u003c\/strong\u003e The system is designed around threaded adapters rather than compression rings, preventing camera tilt and ensuring a rigid optical path from the focuser to the sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Adapter Versatility:\u003c\/strong\u003e The conical adapter directly accommodates full-frame cameras with M48 threads and provides larger M54 and M68 threads for connecting to other specialized equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 2\" and 1.25\" Adapters:\u003c\/strong\u003e For visual use or connecting planetary cameras, standard 2\" and 1.25\" adapters are also included, making the scope ready for observation out of the box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAskar FRA600 vs. Triplet APOs: The Built-in Flattener Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile a premium 108mm triplet APO can deliver excellent color correction, it almost always requires an external field flattener to produce a flat field for astrophotography. The Askar FRA600's quintuplet design integrates this function into the main optics, offering distinct advantages.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Simplicity:\u003c\/strong\u003e You don't need to purchase and correctly space a separate flattener. The FRA600 is flat by design, simplifying your imaging train and reducing potential points of failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Correction:\u003c\/strong\u003e The optical prescription is a single, cohesive system. The lenses are designed from the ground up to work together, providing correction across a massive 66mm circle that is often difficult to achieve with bolt-on accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCost-Effectiveness:\u003c\/strong\u003e When factoring in the cost of a high-quality, large-format field flattener for a comparable triplet, the integrated design of the FRA600 often represents a superior value for the dedicated astro-imager.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the Askar FRA600's 66mm image circle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003e66mm image circle\u003c\/strong\u003e is exceptionally large, capable of covering full-frame (44mm diagonal) and even some medium-format camera sensors without significant vignetting or distorted stars at the edges. This makes the Askar FRA600 ideal for capturing vast, high-resolution mosaics of nebulae and star fields.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect my full-frame DSLR or mirrorless camera to the Askar FRA600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou can connect your camera using the included conical adapter. This adapter terminates in a standard \u003cstrong\u003eM48x0.75 male thread\u003c\/strong\u003e. You will need a camera-specific M48 T-ring to attach your camera body. Ensure your total spacing, including the T-ring's optical depth, matches the standard 55mm back focus from the M48 thread.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar FRA600's quintuplet design better than a triplet with a flattener?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt's a different approach designed for simplicity and optical optimization. The \u003cstrong\u003eintegrated Petzval design\u003c\/strong\u003e of the Askar FRA600 ensures the flattening is perfectly matched to the objective lenses. This eliminates the need to calculate and test spacing for an external flattener, reducing potential sources of tilt and error in your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the Askar FRA600 be used for visual astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The Askar FRA600 is an excellent visual instrument. Its apochromatic optics provide high-contrast, color-pure views of planets, the Moon, and deep-sky objects. It includes standard \u003cstrong\u003e2\" and 1.25\" adapters\u003c\/strong\u003e to accommodate any standard diagonal and eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Askar FRA600 frame large targets like the North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its \u003cstrong\u003e600mm focal length\u003c\/strong\u003e, the Askar FRA600 is perfectly suited for large celestial objects. When paired with a full-frame camera sensor, it can easily frame the entirety of the North American Nebula (NGC 7000) and the neighboring Pelican Nebula (IC 5070) in a single shot, with plenty of room to spare.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 6.5kg weight of the Askar FRA600 suitable for a portable mount like a ZWO AM5?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. At a total weight of \u003cstrong\u003e6.5kg\u003c\/strong\u003e including rings and dovetail, the Askar FRA600 is well within the payload capacity of mounts in the AM5 or Sky-Watcher HEQ5 class. When you add a camera and guide scope, the total imaging payload will remain manageable for these popular and portable mounts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e108mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e600mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Type\u003c\/td\u003e\n\u003ctd\u003eQuintuplet flat-field APO (including two ED elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e66mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e160mm (from the end of rotator M90x1 thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Length\u003c\/td\u003e\n\u003ctd\u003e493mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Weight\u003c\/td\u003e\n\u003ctd\u003e6.5kg (Including tube ring \u0026amp; dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Packing Weight\u003c\/td\u003e\n\u003ctd\u003e7.8kg (not including Aluminum case)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack-end Adapter\u003c\/td\u003e\n\u003ctd\u003eM108x1 male thread (no rotator), M90x1 male thread, 2\" adapter \/ 1.25\" adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConical Adapter Threads\u003c\/td\u003e\n\u003ctd\u003eM90×1 to M68×1 to M54x0.75 to M48×0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFRA600 Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCarry Handle\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDovetail Plate\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSectional Conical Tube Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInspection List\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInstruction Manual\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44967778779421,"sku":"ASK-FRA600","price":3639.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Askar-FRA600-1__27560.1610296043.1280.1280.png?v=1684345835"},{"product_id":"william-optics-fluorostar-91","title":"William Optics Fluorostar 91","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e91mm Aperture Apochromatic Triplet\u003c\/li\u003e\n\u003cli\u003eFPL-53 Glass for Superior Color Correction\u003c\/li\u003e\n\u003cli\u003eStrehl Ratio Exceeding 0.95\u003c\/li\u003e\n\u003cli\u003e3.3\" Dual-Speed Rack \u0026amp; Pinion Focuser\u003c\/li\u003e\n\u003cli\u003e360° Field Rotator for Image Framing\u003c\/li\u003e\n\u003cli\u003eIntegrated Bahtinov Mask in Lens Cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eWilliam Optics Fluorostar 91 APO Triplet Refractor\u003c\/h2\u003e\n\u003cp\u003eThe William Optics Fluorostar 91 refractor combines a 91mm FPL-53 triplet objective with apochromatic correction, delivering images that demonstrate a Strehl ratio exceeding 0.95. Its robust 3.3\" rack and pinion focuser supports heavy imaging trains without flexure, while the 4.2 kg base tube weight ensures portability for demanding use in the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e91mm FPL-53 Triplet Optics: Strehl Ratio \u0026gt; 0.95 for High-Contrast Imaging\u003c\/h3\u003e\n\u003cp\u003eAt the core of the Fluorostar 91 is an air-spaced triplet objective featuring premium FPL-53 glass. This design virtually eliminates chromatic aberration, producing tack-sharp stars with pure color rendition. With a guaranteed Strehl ratio of over 0.95, this optic delivers maximum contrast, making it ideal for resolving fine planetary detail and capturing faint nebulosity against a dark sky background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e3.3\" Rack \u0026amp; Pinion Focuser with 360° Field Rotator\u003c\/h3\u003e\n\u003cp\u003eEngineered for astrophotography, the FLT91 is equipped with a heavy-duty 3.3\" rack and pinion focuser. The dual-speed mechanism allows for coarse and fine adjustments, critical for achieving perfect focus with a camera. The entire focuser assembly includes a 360° field rotator for precise image framing, and the optical train terminates in a 2\" Rotolock adapter that provides a secure, self-centering grip on diagonals and cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Focused Design: Integrated Bahtinov Mask \u0026amp; 4.2 kg Tube Weight\u003c\/h3\u003e\n\u003cp\u003eEvery feature of the Fluorostar 91 is designed with the imager in mind. The lens cap contains an integrated Bahtinov mask, simplifying the process of achieving critical focus. An integrated saddle handle provides a secure grip and a mounting point for guide scopes or other accessories. Weighing only 4.2 kg (5.6 kg fully equipped), the FLT91 is easily managed by mid-sized equatorial mounts, creating a powerful yet portable deep-sky imaging system that comes protected in its own soft carry case.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the William Optics Fluorostar 91 an \"apochromatic triplet\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Fluorostar 91 is an \u003cstrong\u003eapochromatic triplet\u003c\/strong\u003e because it uses a three-element objective lens, including one element made from high-performance \u003cstrong\u003eFPL-53 glass\u003c\/strong\u003e. This combination brings the red, green, and blue wavelengths of light to the same focal point, eliminating distracting color fringing (chromatic aberration) for sharp, high-contrast images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 360° rotator on the FLT91 help with astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e360° field rotator\u003c\/strong\u003e allows you to change the orientation of your camera without loosening any screws or affecting focus. This is essential for composing your shot, letting you frame celestial objects like the Veil Nebula or the Rho Ophiuchi cloud complex perfectly within your sensor's field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich field flatteners are compatible with the Fluorostar 91?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe William Optics FLT91 is designed to be compatible with several William Optics flatteners, allowing for precise back-focus adjustments and a corrected field for various sensor sizes. Recommended models include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFlat 6AIII\u003c\/li\u003e\n\u003cli\u003eFlat 68III\u003c\/li\u003e\n\u003cli\u003eUltra Flat 91\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Fluorostar 91 perform on emission nebulae like the North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe FLT91's FPL-53 optics provide excellent color correction, especially in the red end of the spectrum where hydrogen-alpha emissions from nebulae like NGC 7000 are dominant. This results in tight, well-defined stars without the blue or violet halos that can plague lesser refractors, allowing the faint details of the nebula to stand out.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the William Optics FLT91 for high-magnification planetary viewing of Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The high Strehl ratio (\u003cstrong\u003e\u0026gt; 0.95\u003c\/strong\u003e) of the Fluorostar 91 ensures maximum contrast and sharpness. When seeing conditions are good, you can push the magnification to view fine details like the cloud bands of Jupiter, the Cassini Division in Saturn's rings, and subtle surface features on Mars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the integrated Bahtinov mask in the FLT91's lens cap?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe integrated \u003cstrong\u003eBahtinov mask\u003c\/strong\u003e is a focusing aid that creates a distinct diffraction pattern around a bright star. When the central spike is perfectly centered between the other two, you have achieved critical focus. This built-in tool saves time and removes the guesswork from focusing, ensuring your astrophotos are as sharp as possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eApochromatic Triplet Refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e91mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Glass\u003c\/td\u003e\n\u003ctd\u003eFPL-53\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStrehl Ratio\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 0.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3.3\" Dual-Speed Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Rotator\u003c\/td\u003e\n\u003ctd\u003e360°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003e2\" Rotolock Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFeatures\u003c\/td\u003e\n\u003ctd\u003eIntegrated Saddle Handle, Built-in Bahtinov Mask\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (Tube Only)\u003c\/td\u003e\n\u003ctd\u003e4.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (Fully Equipped)\u003c\/td\u003e\n\u003ctd\u003e5.6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Colors\u003c\/td\u003e\n\u003ctd\u003eGrey, Gold, Red\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Grey","offer_id":44967782088989,"sku":"WO-T-FLT-91SG-RP33","price":3033.0,"currency_code":"CAD","in_stock":true},{"title":"Gold","offer_id":44967782023453,"sku":"WO-T-FLT-91GD-RP33","price":2877.0,"currency_code":"CAD","in_stock":true},{"title":"Red","offer_id":44967782056221,"sku":"WO-T-FLT-91RD-RP33","price":2877.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Williamo-Optics-FLT91-1.jpg?v=1722276083"},{"product_id":"william-optics-fluorostar-120","title":"William Optics Fluorostar 120","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e120mm Aperture\u003c\/li\u003e\n\u003cli\u003eFPL-53 Triplet Apochromatic Optics\u003c\/li\u003e\n\u003cli\u003e3.3\" Rack \u0026amp; Pinion Focuser\u003c\/li\u003e\n\u003cli\u003eBuilt-in Camera Angle Rotator\u003c\/li\u003e\n\u003cli\u003eIntegrated Bahtinov Mask\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eWilliam Optics Fluorostar 120 Triplet APO Refractor\u003c\/h2\u003e\n      \u003cp\u003eThe William Optics Fluorostar 120 refractor combines a 120mm apochromatic triplet objective made with FPL-53 glass and a robust 3.3\" rack and pinion focuser for high-contrast, color-free astrophotography. Its imaging train begins with a native M92 thread and includes adapters for a 2\" RotoLock and a 1.25\" visual back, ensuring broad compatibility with your cameras and accessories.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eA 120mm FPL-53 Triplet for Pure-Color Imaging\u003c\/h3\u003e\n      \u003cp\u003eAt the heart of the Fluorostar 120 lies an air-spaced triplet objective featuring premium FPL-53 glass. This apochromatic design provides outstanding correction of chromatic aberration, eliminating the false color halos around bright stars that can compromise contrast and detail in lesser refractors. The result is a pristine, high-contrast image with pinpoint stars on a dark background, essential for capturing the subtle colors of nebulae and galaxies.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eThe 3.3\" Rack \u0026amp; Pinion Focuser and Rotator System\u003c\/h3\u003e\n      \u003cp\u003eBuilt to handle heavy imaging loads, the heavy-duty 3.3\" rack and pinion focuser provides a rigid, zero-flexure platform for large cameras, filter wheels, and off-axis guiders. A built-in rotator allows you to frame your target perfectly without loosening the camera. The robust build necessary to support a full imaging rig means this is not a lightweight instrument; you will need a substantial mount to carry it effectively.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eNative Connection:\u003c\/strong\u003e The focuser drawtube terminates in a secure M92 thread.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e2-Inch Adapter:\u003c\/strong\u003e An included adapter steps the connection down to a William Optics 2\" RotoLock, a self-centering system for accessories.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e1.25-Inch Adapter:\u003c\/strong\u003e For visual use or smaller guide cameras, a final adapter provides a standard 1.25\" visual back.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eIntegrated Design: From M92 Threads to a Losmandy Plate\u003c\/h3\u003e\n      \u003cp\u003eThe Fluorostar 120 is engineered with practical features that streamline your imaging sessions. An integrated, patented Bahtinov Mask, built into the lens cap, is significantly lighter than traditional metal masks and makes achieving critical focus simple. The CNC-machined saddle handle bar not only provides a secure grip but also accepts Vixen-style mounting for guidescopes like the William Optics Uniguide. The entire optical tube assembly is secured by a sturdy Losmandy-style dovetail plate for a solid connection to your equatorial mount.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Fluorostar 120's FPL-53 triplet design ideal for astrophotography?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003eFPL-53 glass\u003c\/strong\u003e in the Fluorostar 120's triplet lens system provides excellent correction of chromatic aberration. This means stars appear as sharp, color-pure points of light without distracting purple or blue halos, resulting in higher contrast and more natural-looking astrophotos.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the integrated Bahtinov mask on the Fluorostar 120 simplify focusing?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe patented Bahtinov Mask is built directly into the lens cap of the Fluorostar 120. To use it, you simply uncap the telescope, aim at a bright star, and adjust focus until the central diffraction spike is perfectly centered between the other two. This provides a fast, precise, and repeatable method for achieving critical focus every time you set up.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of imaging train can the Fluorostar 120's 3.3\" focuser support?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe heavy-duty \u003cstrong\u003e3.3\" rack and pinion focuser\u003c\/strong\u003e is designed to handle significant weight without slipping or flexing. It can easily support a full astrophotography setup, including a cooled astronomy camera, a large filter wheel, and an off-axis guider, ensuring your entire imaging train remains stable throughout the night.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Fluorostar 120 perform when imaging the hydrogen-alpha regions in the Cygnus Loop (Veil Nebula)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Fluorostar 120's apochromatic optics excel at imaging emission nebulae like the Veil Nebula. The high-contrast views and excellent color correction allow the fine, filamentary details of the hydrogen-alpha structures to be captured with exceptional clarity against a dark sky background, especially when paired with narrowband filters.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the benefits of the Fluorostar 120's rotator when framing a large target like the Andromeda Galaxy (M31) with a full-frame camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe built-in camera angle rotator on the Fluorostar 120 lets you adjust the orientation of your camera without having to loosen any other components in the imaging train. This is crucial for large targets like M31, as it allows you to precisely align the galaxy's long axis with your camera sensor's diagonal for the most compelling composition.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat mounting hardware is included with the William Optics Fluorostar 120?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe William Optics Fluorostar 120 comes with essential mounting hardware for immediate setup. This includes a CNC-machined handle that doubles as a Vixen-style saddle for accessories, mounting rings, and a Losmandy-style dovetail plate for secure attachment to a compatible equatorial mount.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAvailable Options\u003c\/td\u003e\n\u003ctd\u003eRed, Gold, Space Gray\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eM92 Rotator Adapter\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eM92 to 2\" RotoLock Adapter\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003e2\" to 1.25\" Visual Back Adapter\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Red","offer_id":44967917682973,"sku":"WO-A-F120RD-RP33","price":4965.0,"currency_code":"CAD","in_stock":true},{"title":"Gold","offer_id":44967917650205,"sku":"WO-A-F120GD-RP33","price":4965.0,"currency_code":"CAD","in_stock":true},{"title":"Space Gray","offer_id":44967917715741,"sku":"WO-A-F120TG-RP33","price":4965.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/William-Optics-FLT120-1.jpg?v=1722276874"},{"product_id":"askar-fra500-90mm-f-5-6-quintuplet-apo","title":"Askar FRA500 90mm f\/5.6 Quintuplet APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e90mm Aperture Quintuplet APO Optics\u003c\/li\u003e\n\u003cli\u003e500mm Focal Length at f\/5.6\u003c\/li\u003e\n\u003cli\u003eMassive 55mm Flat-Field Image Circle\u003c\/li\u003e\n\u003cli\u003eIncludes Two ED Glass Elements\u003c\/li\u003e\n\u003cli\u003eTotal Assembled Weight of 5.2kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAskar FRA500 90mm f\/5.6 Quintuplet APO Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar FRA500 Astrograph combines a 90mm aperture and 500mm focal length into a portable f\/5.6 optical system designed for serious deep-sky imaging. Its quintuplet air-spaced APO objective, which includes two ED glass elements, delivers a massive 55mm corrected image circle, fully illuminating full-frame sensors and beyond with no additional flattener required. With a total weight of just 5.2kg including rings and plate, the FRA500 is engineered for field portability without compromising on optical stability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eQuintuplet APO Optics: A Flat 55mm Image Circle\u003c\/h3\u003e\n\u003cp\u003eThe core of the FRA500 is its 5-element Petzval-style optical design, which provides a natively flat field without the need for a separate flattener. The front triplet objective, featuring two pieces of extra-low dispersion (ED) glass, ensures excellent color correction, while the rear doublet corrects for field curvature. This produces sharp, pinpoint stars across an exceptionally wide 55mm image circle, exceeding the diagonal of a standard 44mm full-frame sensor and providing ample room for framing large targets or accommodating larger format cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready Design: A 3.5\" Focuser and 158mm of Back Focus\u003c\/h3\u003e\n\u003cp\u003eBuilt for the demands of modern astrophotography, the FRA500 features a robust 3.5-inch rack-and-pinion focuser with 1:10 dual-speed control for precise adjustments, even with heavy camera payloads. The system simplifies imaging train configuration by offering generous, fixed back focus distances. You have 158mm of focus travel from the base of the M86x1 rotator thread and 85mm from the base of the included M48x0.75 conical adapter, eliminating the guesswork of spacing and adapters. This allows you to directly attach your camera, filter wheel, and off-axis guider with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eField-Ready Mechanics: A Portable 5.2kg Imaging Platform\u003c\/h3\u003e\n\u003cp\u003eEngineered for transport and stability, the FRA500's optical tube weighs only 4.1kg and measures just 452mm with its dew shield extended (407mm retracted). The complete package, including the CNC-machined tube rings, carry handle, and Losmandy-style dovetail plate, comes in at a manageable 5.2kg. This makes the astrograph an ideal choice for portable setups on mid-range equatorial mounts, allowing you to travel to dark-sky sites without sacrificing the optical power needed for high-resolution imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAskar FRA500 vs. FRA400 \u0026amp; FRA600: Finding the Sweet Spot\u003c\/h3\u003e\n\u003cp\u003eThe FRA500 is strategically positioned within Askar's Flatfield Refractor Astrograph series to offer a balanced solution for many imagers. It provides a significant step up in aperture and light-gathering power over the smaller FRA400, giving you more resolving power for distant galaxies and fine nebula detail. Compared to the larger FRA600, the FRA500 is substantially lighter and more compact, requiring a less demanding mount and making it a far more practical choice for travel and quick setup. For many astrophotographers, the FRA500 represents the ideal compromise between aperture, focal length, and portability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of camera sensor is the Askar FRA500's 55mm image circle for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e55mm image circle\u003c\/strong\u003e is designed to fully illuminate and correct for sensors larger than standard full-frame (44mm diagonal). This makes the Askar FRA500 an excellent match for full-frame DSLR\/mirrorless cameras and dedicated astronomy cameras with large sensors like the ZWO ASI6200 or QHY600, ensuring pinpoint stars and no vignetting at the corners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a separate field flattener for the Askar FRA500?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Askar FRA500 features an integrated \u003cstrong\u003equintuplet (5-element) Petzval optical design\u003c\/strong\u003e. This design inherently corrects for field curvature, providing a flat field across the entire 55mm image circle without the need for any additional flattener or reducer lenses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Askar FRA500 frame large targets like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its \u003cstrong\u003e500mm focal length\u003c\/strong\u003e, the Askar FRA500 provides an ideal image scale for large deep-sky objects. When paired with a full-frame sensor, it can comfortably frame the entirety of the Andromeda Galaxy (M31), the North American Nebula (NGC 7000), or the Veil Nebula complex in a single shot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Askar FRA500's 5.2kg weight?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe total imaging weight is \u003cstrong\u003e5.2kg\u003c\/strong\u003e for the telescope, rings, and plate. Once you add a guide scope, camera, and other accessories, your total payload will likely be around 7-9kg. A mid-range equatorial mount with a payload capacity of 13kg (30 lbs) or more, such as a Sky-Watcher HEQ5 or iOptron CEM26\/GEM28, would be a stable platform for imaging with the FRA500.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the 85mm and 158mm back focus distances on the FRA500 for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThese are the two primary connection options for your imaging train. The \u003cstrong\u003e158mm distance\u003c\/strong\u003e is measured from the M86x1 thread on the rotator, giving you maximum space for complex setups. The \u003cstrong\u003e85mm distance\u003c\/strong\u003e is measured from the M48x0.75 thread on the included conical adapter, which is a more common connection for DSLRs or cameras with integrated filter wheels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar FRA500 for imaging the Orion Nebula (M42) from a portable setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The Orion Nebula (M42) is a perfect target for this telescope. Its f\/5.6 focal ratio is fast enough to capture faint nebulosity quickly, and its 500mm focal length will resolve fine details in the Trapezium region. Given its total weight of 5.2kg, the FRA500 is an excellent choice for a high-performance portable imaging rig.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e90mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e500mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eQuintuplet air-spaced APO (including two ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e85mm (from M48x0.75 thread); 158mm (from M86x1 thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Thread\u003c\/td\u003e\n\u003ctd\u003eM86x1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConical Adapter\u003c\/td\u003e\n\u003ctd\u003eM48x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e452mm (407mm with dew shield contracted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e4.1kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Weight\u003c\/td\u003e\n\u003ctd\u003e5.2kg (including tube rings \u0026amp; dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFRA500 OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCarry Handle\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAskar Losmandy Dovetail Plate\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eConical Extender (M48x0.75)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eManual\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44967965425949,"sku":"ASK-FRA500","price":2799.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Askar-FRA500__40204.1641245267.1280.1280.jpg?v=1684347331"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/optical-tubes.oembed?page=5","provider":"David Astro","version":"1.0","type":"link"}