{"title":"SharpStar Optics Telescopes","description":"\u003cp\u003eSharpStar Optics telescopes are imaging instruments across refractor and reflector designs. Refractors run from the 50EDPH and 94EDPH f\/5.5 triplets and the 140PH f\/6.5 triplet to multi-element astrographs: the 100QII f\/5.8 quadruplet, the 121SDQ f\/5.6 quintuplet and the Z4 100mm f\/5.5 sextuplet. For more aperture, the HNT 130mm and 150mm f\/2.8 and PNT 200mm f\/3.2 are fast Newtonian astrographs, and the SCA260 V2 and SCA310 are Cassegrain astrographs for longer focal lengths.\u003c\/p\u003e","products":[{"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":"sharpstar-130mm-f-2-8-hnt-hyperbolic-newtonian-astrograph","title":"SharpStar 130mm f\/2.8 HNT Hyperbolic Newtonian Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e130mm Hyperbolic Newtonian Optics\u003c\/li\u003e\n\u003cli\u003e364mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/2.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e44mm Full-Frame Image Circle\u003c\/li\u003e\n\u003cli\u003eTotal Assembled Weight: 4.8kg\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 130mm f\/2.8 HNT Hyperbolic Newtonian Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe SharpStar 130mm f\/2.8 HNT Astrograph combines a 130mm hyperbolic primary mirror with a 364mm focal length to achieve its native f\/2.8 optical speed. It illuminates a full 44mm image circle, covering modern full-frame sensors with a vast 6.9-degree field of view and resolving details down to 0.89 arc seconds. Weighing just 4.8kg with its rings and plate, this astrograph provides this wide-field imaging capability in a compact 400mm tube length.\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\/2.8 Hyperbolic Optics: 130mm Aperture at 364mm Focal Length\u003c\/h3\u003e\n\u003cp\u003eAt the core of the 130HNT is a fast, light-gathering optical system designed for one purpose: deep-sky imaging. The 130mm hyperbolic primary mirror, made from low-expansion PZ33 glass, works in tandem with a two-element corrector to deliver sharp stars across the field. This f\/2.8 focal ratio allows you to capture faint details in nebulae and galaxies with significantly shorter exposure times compared to slower f\/5 or f\/7 systems.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Coatings:\u003c\/strong\u003e Both the primary and secondary mirrors feature an enhanced aluminum coating, ensuring reflectivity greater than 96% for brighter images and better signal-to-noise ratio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePZ33 Primary Mirror:\u003c\/strong\u003e The Pyrex-like PZ33 mirror material minimizes thermal expansion and contraction, helping the telescope maintain focus as ambient temperatures change during an imaging session.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrected Field:\u003c\/strong\u003e The corrector assembly includes an ED (Extra-low Dispersion) glass element to suppress chromatic aberration, ensuring star colors are rendered accurately without distracting halos.\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\u003e44mm Image Circle for 6.9° Wide-Field Views\u003c\/h3\u003e\n\u003cp\u003eThe 130HNT is engineered to fully illuminate a 44mm image circle, making it an ideal match for full-frame DSLR, mirrorless, and dedicated astronomy cameras. A 65mm secondary mirror ensures there is no vignetting across these large sensors. This expansive 6.9-degree field of view lets you frame enormous targets like the Andromeda Galaxy (M31) or the entire North American Nebula (NGC 7000) in a single shot.\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 Rigid 4.8kg System with CNC-Machined Components\u003c\/h3\u003e\n\u003cp\u003eAn astrograph's mechanical stability is just as critical as its optical design. The SharpStar 130HNT is built from all-metal components, featuring a rigid aluminum main tube and CNC-machined parts for the focuser, secondary bracket, and mirror cell. This construction ensures precise, repeatable collimation and minimizes mechanical flexure, even with a heavy imaging payload.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable Secondary Bracket:\u003c\/strong\u003e The integrated, CNC-machined secondary mirror bracket is designed for rigidity, which not only holds collimation but also produces clean, sharp diffraction spikes on bright stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-Point Primary Cell:\u003c\/strong\u003e The primary mirror cell features three sets of adjustment screws for precise collimation, ensuring you can align the optical system for peak performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight Rings:\u003c\/strong\u003e The included tube rings have a hollowed-out design to reduce weight without sacrificing strength, bringing the total assembled weight to a portable 4.8kg.\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\u003e3kg Capacity Focuser with Integrated Rotator and 55mm Back Focus\u003c\/h3\u003e\n\u003cp\u003eThe imaging train is managed by a heavy-duty, dual-speed rack-and-pinion focuser designed to carry a payload of up to 3kg. This robust focuser can easily support a full-frame camera, filter wheel, and off-axis guider without slipping or tilting. An integrated 360° camera rotator allows you to frame your target perfectly without loosening any other components, while the standard 55mm back focus simplifies the process of connecting your camera and accessories using standard M48 spacers.\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 130HNT vs. 130mm APO Refractors: The f\/2.8 Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile a 130mm apochromatic refractor offers a maintenance-free, sealed optical tube, the SharpStar 130HNT provides a decisive advantage in speed. A typical 130mm APO has a focal ratio around f\/7, whereas the 130HNT operates at f\/2.8.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExposure Time:\u003c\/strong\u003e The f\/2.8 system gathers light over six times faster than an f\/7 system. An 1-minute exposure on the 130HNT collects the same amount of signal as a 6-minute exposure on the refractor, allowing you to complete projects in a fraction of the time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField of View:\u003c\/strong\u003e With its 364mm focal length, the 130HNT delivers a much wider field of view than a 130mm refractor, which typically has a focal length over 900mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrade-off:\u003c\/strong\u003e The Newtonian design requires periodic collimation to maintain peak optical alignment, a step not needed with a refractor. However, for imagers prioritizing speed and field of view, this is a manageable trade-off for the dramatic reduction in exposure time.\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 130HNT's f\/2.8 speed so important for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn \u003cstrong\u003ef\/2.8 focal ratio\u003c\/strong\u003e dramatically reduces the exposure time needed to capture faint deep-sky objects. Compared to a more common f\/5.6 instrument, it gathers light four times faster. This means you can capture more data in a single night, improve your signal-to-noise ratio, and place less demand on your tracking mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SharpStar 130HNT's 44mm image circle perform on large targets like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e44mm image circle\u003c\/strong\u003e is designed for full-frame sensors. Combined with the 364mm focal length, this provides a massive 6.9-degree field of view. This is wide enough to capture the entire Andromeda Galaxy (M31) and its satellite galaxies, M32 and M110, with plenty of surrounding space, making it ideal for large-scale mosaics and framing the biggest nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to collimate the SharpStar 130HNT, and is it difficult?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, as a Newtonian reflector, the \u003cstrong\u003eSharpStar 130HNT requires collimation\u003c\/strong\u003e to ensure the mirrors are perfectly aligned for sharp images. The primary mirror features three sets of user-friendly adjustment screws. While it requires a laser collimator or cheshire eyepiece, the process is straightforward and essential for achieving the telescope's specified 0.89 arc second resolution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the 3kg focuser capacity of the SharpStar 130HNT handle a full-frame camera, filter wheel, and off-axis guider?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The \u003cstrong\u003e3kg payload capacity\u003c\/strong\u003e of the dual-speed rack-and-pinion focuser is specifically designed for modern imaging setups. A typical full-frame cooled CMOS camera, 7-position filter wheel, and an off-axis guider will fall well within this limit, preventing focuser sag or tilt during long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the standard 55mm back focus on the SharpStar 130HNT, and why does it matter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e55mm back focus\u003c\/strong\u003e is the standardized distance required between the focuser's M48 thread and your camera's sensor for the optical corrector to work properly. This standard is used by most DSLRs (with a T-ring) and dedicated astronomy cameras, making it easy to achieve the correct spacing without complex calculations or custom adapters.\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 PZ33 primary mirror in the SharpStar 130HNT?\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 similar to Pyrex, with a very low coefficient of thermal expansion. This means as the temperature drops overnight, the mirror's shape remains stable, preventing the focus from shifting. This is a critical feature for maintaining sharp stars over a long imaging session.\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\u003e130mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e364mm\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\u003e6.9°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.89 arc second\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Visual Magnitude\u003c\/td\u003e\n\u003ctd\u003e12.3\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 (similar to Pyrex glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Minor Axis\u003c\/td\u003e\n\u003ctd\u003e65mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector\u003c\/td\u003e\n\u003ctd\u003eTwo-element air-spaced refractive lenses (one ED glass)\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\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\u003e174mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain Tube Length\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e3.8kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Weight (with Rings \u0026amp; Plate)\u003c\/td\u003e\n\u003ctd\u003e4.8kg\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:\/\/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\"\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":44968028766493,"sku":"SSO-13028HNT-AL","price":2303.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SSO-13028HNT-AL.jpg?v=1755111542"},{"product_id":"sharpstar-z4-100mm-f-5-5-sextuplet-apo-astrograph","title":"Sharpstar Z4 100mm f\/5.5 Sextuplet Apo Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e100mm Aperture\u003c\/li\u003e\n\u003cli\u003ef\/5.5 Focal Ratio \/ 550mm Focal Length\u003c\/li\u003e\n\u003cli\u003eSextuplet Air-Spaced APO Optical Design\u003c\/li\u003e\n\u003cli\u003e36mm Corrected Image Circle\u003c\/li\u003e\n\u003cli\u003e4.3kg 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 Z4 100mm f\/5.5 Sextuplet Apo Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Sharpstar Z4 100mm f\/5.5 Sextuplet Apo Astrograph integrates a fast optical system and a field flattener into a single, compact instrument. Its 100mm aperture and 550mm focal length provide a wide field of view ideal for large nebulae and star fields. The sextuplet air-spaced APO design, which includes two ED glass elements, produces a 36mm corrected image circle, while the entire optical tube assembly has a net weight of only 4.3kg and a total length of 482mm.\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\u003eSextuplet Optics: A 100mm f\/5.5 Flat-Field System\u003c\/h3\u003e\n\u003cp\u003eThe Z4's optical core is a six-element lens system, arranged in two groups of three, that is designed for color-free, high-contrast imaging. With a fast focal ratio of f\/5.5, you can capture significant signal in shorter sub-exposure times, reducing demands on your mount's tracking. The inclusion of two extra-low dispersion (ED) glass elements minimizes chromatic aberration, ensuring that stars are tight and focused without distracting color fringes.\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 Design: 36mm Image Circle with Zero Back-Focus Calculation\u003c\/h3\u003e\n\u003cp\u003eUnlike traditional refractors that require separate flatteners and precise spacing, the Sharpstar Z4 is a self-flattened astrograph. This design eliminates the guesswork of achieving a flat field; simply bring your camera to focus and the optical system delivers sharp stars across its entire 36mm image circle. This is a significant advantage for imagers who want to spend less time on setup and more time acquiring data. The 36mm circle fully illuminates APS-C sensors and is compatible with many full-frame cameras with minor, correctable vignetting.\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\u003eMechanics \u0026amp; Connectivity: 4.3kg OTA with a 4-Piece Adapter Set\u003c\/h3\u003e\n\u003cp\u003eWeighing only 4.3kg, the Z4 is compatible with a wide range of mid-capacity equatorial mounts, making it an excellent choice for portable setups. The instrument includes a robust focuser with a 360° rotator, allowing you to frame your target perfectly without rotating your camera and upsetting cable management. To ensure immediate compatibility with your imaging train, Sharpstar includes a 4-piece adapter set that steps down to a standard M48×0.75 male thread, which also features an internal thread for mounting 2\" filters.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight Build:\u003c\/strong\u003e The 4.3kg net weight makes balancing easy and is gentle on your mount's payload capacity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Adapters:\u003c\/strong\u003e The package provides a complete set of adapters to connect your camera right out of the box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter-Ready:\u003c\/strong\u003e The final M48 adapter is threaded to accept standard 2\" astronomy filters for nebula or light pollution 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 does \"self-flattened\" mean for the Sharpstar Z4 astrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA self-flattened design means the field-flattening optics are integrated directly into the main telescope body. Unlike other refractors, the \u003cstrong\u003eSharpstar Z4\u003c\/strong\u003e does not require a separate field flattener accessory or complex back-focus calculations to achieve sharp stars across the field. You just need to achieve focus with your camera.\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 Sharpstar Z4's 36mm image circle suitable for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eSharpstar Z4's\u003c\/strong\u003e 36mm corrected image circle is ideal for cameras with \u003cstrong\u003eAPS-C sized sensors\u003c\/strong\u003e, which it will illuminate fully without vignetting. It can also be used with many full-frame (36mm x 24mm) sensor cameras, though some minor vignetting may be present at the extreme corners, which can typically be corrected with flat frames.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the Sharpstar Z4 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 \u003cstrong\u003eSharpstar Z4\u003c\/strong\u003e is an excellent choice for M31. Its 550mm focal length provides a wide field of view that can frame the entire galaxy, including its satellite companions M32 and M110, when paired with a full-frame or APS-C camera. The fast f\/5.5 optics will help capture the faint outer dust lanes with reasonable exposure times.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Sharpstar Z4's 4.3kg weight suitable for a portable mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, at just \u003cstrong\u003e4.3kg (net weight)\u003c\/strong\u003e, the \u003cstrong\u003eSharpstar Z4\u003c\/strong\u003e is well-suited for many popular portable equatorial mounts, such as the Sky-Watcher HEQ5 or iOptron CEM26. Its light weight leaves ample capacity for a guide scope, camera, and other accessories without straining the mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach a 2-inch filter to the Sharpstar Z4 imaging train?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe included 4-piece adapter set for the \u003cstrong\u003eSharpstar Z4\u003c\/strong\u003e terminates in an M54×0.75-to-M48×0.75 adapter. This final M48 adapter has an internal female thread designed to accept standard \u003cstrong\u003e2-inch (M48×0.75) filters\u003c\/strong\u003e directly, placing the filter at the correct distance within the optical path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Sharpstar Z4 require a separate field flattener or reducer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The \u003cstrong\u003eSharpstar Z4\u003c\/strong\u003e is an integrated astrograph with a built-in flattener. You do not need to purchase a separate one. The optical design is fixed at a focal length of 550mm and f\/5.5; reducers are not part of its intended 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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e550mm\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\u003c\/td\u003e\n\u003ctd\u003eSextuplet fully air-spaced APO (including two ED glasses)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e36mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e482mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e4.3kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e5.6kg (without aluminum box)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-End Thread\u003c\/td\u003e\n\u003ctd\u003eM48×0.75 male thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Adapters\u003c\/td\u003e\n\u003ctd\u003eM86×1-M68×1, M68×1-M54×0.75, M54×0.75-M54×0.75, M54×0.75-M48×0.75 (with 2\" filter thread)\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 Z4 100mm 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 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\"\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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e4-Piece Photographic Adapter Set\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\"\u003eWarranty Card\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\/SharpStar_Z4_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":"SharpStar Optics","offers":[{"title":"Default Title","offer_id":44968043381021,"sku":"SSO-Z4","price":3233.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SharpStar-Z4-Sextuplet-APO-Astrograph__53862.1661627276.1280.1280.jpg?v=1684348251"},{"product_id":"sharpstar-50edph-f-5-5-triplet-apo","title":"SharpStar 50EDPH f\/5.5 Triplet APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e50mm Aperture Triplet APO Objective\u003c\/li\u003e\n\u003cli\u003e275mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/5.5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eIncludes Two ED Glass Elements\u003c\/li\u003e\n\u003cli\u003e1.07kg Total Weight\u003c\/li\u003e\n\u003cli\u003e196mm Retracted Length\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 50EDPH f\/5.5 Triplet APO\u003c\/h2\u003e\n\u003cp\u003eThe SharpStar 50EDPH f\/5.5 Triplet APO delivers exceptional color correction from a 50mm objective by using two extra-low dispersion (ED) glass elements in its air-spaced triplet design. With a native 275mm focal length, this ultra-portable refractor weighs just 1.07kg and measures a mere 196mm long, making it an ideal companion for travel, wide-field imaging, or as a high-end guide scope capable of reaching a limiting magnitude of 10.3.\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: 50mm f\/5.5 with Two ED Elements\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the 50EDPH is an air-spaced triplet objective, a design rarely seen in telescopes of this small 50mm aperture. Including two separate ED glass elements provides outstanding chromatic aberration control, ensuring stars are sharp, pinpoint sources of light without distracting purple fringing. The fast f\/5.5 focal ratio gathers light efficiently, making it well-suited for capturing faint, extended objects like the North American Nebula (NGC 7000).\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-Portable Build: A 1.07kg Grab-and-Go Design\u003c\/h3\u003e\n\u003cp\u003eEngineered for portability, the 50EDPH weighs only 1.07kg and has a contracted tube length of 196mm, compact enough to fit in a small camera bag. The scope features a 70mm Vixen-style dovetail plate with slotted 1\/4-20 threaded holes, allowing it to be mounted securely on astronomical mounts or standard photographic tripods. A retractable dew shield further enhances its compact form factor while protecting the objective from moisture and stray light.\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: 360° Rotator and 1.25\" Adapter\u003c\/h3\u003e\n\u003cp\u003eThe 50EDPH is built with the astrophotographer in mind. It includes a 360° rotator for precise camera framing and a dual-speed rack-and-pinion focuser for critical 1:10 fine adjustments. For visual observers, the rear includes a standard 1.25\" adapter for use with diagonals and eyepieces. The package also includes a 2-section 5cm M48 extension tube, enabling you to achieve focus with planetary cameras or for straight-through visual observation without a diagonal.\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 SharpStar 50EDPH's optics special for its size?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eSharpStar 50EDPH\u003c\/strong\u003e uses a triplet air-spaced apochromatic (APO) objective that includes \u003cstrong\u003etwo ED glass elements\u003c\/strong\u003e. This is a highly advanced optical design for a 50mm telescope, providing superior color correction and sharper stars compared to standard doublet or single-ED refractors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I mount the SharpStar 50EDPH?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe telescope comes with a \u003cstrong\u003e70mm Vixen-style dovetail plate\u003c\/strong\u003e. This plate is compatible with most modern astronomical mounts. Additionally, it has 1\/4-20 threaded holes, allowing you to mount it directly to a standard photographic tripod for quick visual sessions or terrestrial viewing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the included M48 extension tubes for on the 50EDPH?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe two 5cm M48 extension tubes are included to provide the correct back focus for different setups. You can use them to reach focus when using a planetary camera or when performing straight-through visual observation with a 1.25\" eyepiece without a star diagonal in the optical path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SharpStar 50EDPH for visual observation of the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The \u003cstrong\u003e275mm focal length\u003c\/strong\u003e provides a very wide field of view, perfect for framing large objects like the Orion Nebula (M42) in its entirety. Paired with a low-power 1.25\" eyepiece, you can easily fit the nebula and its surrounding star-forming regions into a single, immersive view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SharpStar 50EDPH suitable for imaging the Andromeda Galaxy (M31) with a DSLR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 50EDPH is an excellent choice for imaging large targets like the Andromeda Galaxy (M31). Its 275mm focal length is a great match for framing the full extent of the galaxy on APS-C or even some full-frame sensors. The high-quality triplet optics will ensure the galaxy's core and dust lanes are captured with sharp, color-pure stars across the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the limitations of a 50mm aperture on the SharpStar 50EDPH?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile its optical quality is superb, a \u003cstrong\u003e50mm aperture\u003c\/strong\u003e primarily excels at wide-field views and portability. It has a limiting visual magnitude of 10.3, meaning it is not designed for high-magnification views of planets or resolving faint details in small, distant galaxies. Its strength lies in capturing large nebulae, star clusters, and vast sections of the Milky Way.\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\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e275mm\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\u003c\/td\u003e\n\u003ctd\u003eTriplet Air-Spaced APO (with two ED glass elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Visual Magnitude\u003c\/td\u003e\n\u003ctd\u003e10.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length (Dew Shield Contracted)\u003c\/td\u003e\n\u003ctd\u003e196mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e1.07kg (including dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Interface\u003c\/td\u003e\n\u003ctd\u003e1.25\" Visual 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\"\u003e50EDPH 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-Section 5cm M48 Extension Tube\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\"\u003e70mm Vixen-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:\/\/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":47477227258141,"sku":"SSO-SHEDPH50","price":615.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SharpStar-50-EDPH.jpg?v=1705688038"},{"product_id":"sharpstar-sca310","title":"Sharpstar SCA310 f\/3.8 Aspherical Cassegrain Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e310mm Aperture Aspherical Primary Mirror\u003c\/li\u003e\n\u003cli\u003e1178mm Focal Length at a Fast f\/3.8\u003c\/li\u003e\n\u003cli\u003e55mm Corrected Image Circle for Medium Format Sensors\u003c\/li\u003e\n\u003cli\u003eTriplet Corrector with one ED Glass Element\u003c\/li\u003e\n\u003cli\u003eLightweight Carbon Fiber Tube Construction\u003c\/li\u003e\n\u003cli\u003e3.5-inch Rack-and-Pinion Focuser with 360° Rotator\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\u003eSharpstar SCA310 f\/3.8 Aspherical Cassegrain Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Sharpstar SCA310 combines a massive 310mm aspherical primary mirror with a fast f\/3.8 focal ratio to deliver exceptional light-gathering power in a compact design. Its integrated triplet corrector produces a flat, coma-free 55mm image circle, fully illuminating medium-format sensors. With a tube length of just 721mm and a total weight of 23.5kg, this astrograph provides the deep-sky imaging capability of a much 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\u003e310mm f\/3.8 Aspherical Optics: A 55mm Corrected Image Circle\u003c\/h3\u003e\n\u003cp\u003eAt the core of the SCA310 is a 310mm aspherical primary mirror, precisely figured to eliminate spherical aberration for sharp, point-like stars. Paired with a thermally stable secondary, this system achieves a 1178mm focal length. A permanently integrated 3-element corrector, featuring one ED glass element, flattens the field and corrects for coma, producing a 55mm image circle capable of covering the largest full-frame and medium-format CMOS sensors with near 100% illumination.\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\u003e721mm Carbon Fiber Tube: Thermal Stability at 23.5kg\u003c\/h3\u003e\n\u003cp\u003eThe SCA310's optical path is housed in a carbon fiber tube, which offers a superior stiffness-to-weight ratio and minimal thermal expansion. This ensures that focus remains stable during temperature drops over a long imaging session. The entire optical tube assembly is only 721mm long, a significant advantage for portability and mount requirements compared to other designs of similar aperture, and weighs a substantial 23.5kg.\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\u003e3.5-inch Focuser: 30mm Travel and 360° Rotation\u003c\/h3\u003e\n\u003cp\u003eTo handle modern heavy imaging trains, the SCA310 is equipped with a 3.5-inch high-rigidity rack-and-pinion focuser. This unit provides 30mm of travel with a 1:10 dual-speed knob for precise adjustments and can support heavy camera and filter wheel combinations without slippage. A 360° rotator allows for easy framing of your target, and the rear is equipped with M68, M54, and M48 adapters for direct connection to your camera. The M48 adapter also includes a built-in thread for 2-inch filters.\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 Cooling: 3 Fans for Rapid Thermal Equilibrium\u003c\/h3\u003e\n\u003cp\u003eTo maximize image quality from the start of your session, the SCA310 integrates three cooling fans behind the primary mirror. Activating these fans before you begin imaging rapidly brings the 310mm primary mirror to ambient temperature. This minimizes tube currents and ensures the sharpest possible views, significantly improving efficiency and overall imaging results.\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\u003eSCA310 vs. 12\" Newtonian Astrographs: The Cassegrain Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile a 12\" (approx. 300mm) f\/4 Newtonian offers similar aperture and speed, the SCA310's Cassegrain design provides distinct advantages for the dedicated astrophotographer.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompactness:\u003c\/strong\u003e The SCA310's 721mm tube is over 400mm shorter than a typical 12\" f\/4 Newtonian OTA. This makes it easier to transport, balance, and house in an observatory, and it places less strain on the mount.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Correction:\u003c\/strong\u003e The SCA310's corrector is a permanent, optimized part of the optical design. You do not need to purchase or install a separate coma corrector, and the back focus is fixed and simple to work with.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStray Light and Dew:\u003c\/strong\u003e The closed carbon fiber tube offers superior protection against stray light and dew formation compared to the open-truss or single-wall design of most large Newtonians.\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 SCA310's f\/3.8 Cassegrain design unique?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SCA310 uses an \u003cstrong\u003easpherical primary mirror\u003c\/strong\u003e in a Cassegrain configuration. This allows it to achieve a fast f\/3.8 focal ratio and a long 1178mm focal length within a very short 721mm tube. Combined with its integrated triplet corrector, it delivers a large, flat, and coma-free field for serious deep-sky imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SCA310's integrated corrector handle large sensors?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 3-element corrector is specifically designed to produce a \u003cstrong\u003e55mm image circle\u003c\/strong\u003e. This is large enough to cover medium-format sensors and provides excellent, pinpoint stars from edge to edge on full-frame sensors without vignetting, making it ideal for large-format cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the Sharpstar SCA310 fully illuminate a camera like the ZWO ASI2600MC Pro?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The ZWO ASI2600MC Pro has an APS-C sensor with a diagonal of about 28mm. The SCA310's \u003cstrong\u003e55mm image circle\u003c\/strong\u003e will fully illuminate this sensor with plenty of room to spare, ensuring a bright, flat field without any vignetting caused by the optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to calculate back focus for the Sharpstar SCA310?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. According to Sharpstar, the SCA310's optical structure is optimized so that you do not need to perform additional back focus calculations. The included M68, M54, and M48 adapters are designed to place your sensor at the correct distance, simplifying the imaging process significantly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the SCA310's 1178mm focal length perform on small targets like the Dumbbell Nebula (M27)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e1178mm focal length\u003c\/strong\u003e is excellent for framing planetary nebulae like M27 or galaxies like the Whirlpool Galaxy (M51). When paired with a camera using small pixels, you can achieve high-resolution sampling to capture fine structural details in these smaller deep-sky objects.\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 23.5kg Sharpstar SCA310?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a gross weight of \u003cstrong\u003e23.5kg (51.8 lbs)\u003c\/strong\u003e before adding a camera, guide scope, and other accessories, the SCA310 requires a high-capacity equatorial mount. You should look for a mount with a stated instrument capacity of at least 70-80 lbs (approx. 32-36 kg) to ensure stable, flexure-free tracking for long-exposure astrophotography.\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\u003e310mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1178mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/3.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.37\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e55mm (Medium Format)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Type\u003c\/td\u003e\n\u003ctd\u003eAspherical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e184mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Type\u003c\/td\u003e\n\u003ctd\u003eTriplet design (with one ED glass element)\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 Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e378mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e721mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e23.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Thread Adapters\u003c\/td\u003e\n\u003ctd\u003eM68, M54, M48 (with M48x0.75 filter thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus Range\u003c\/td\u003e\n\u003ctd\u003eSupports 38-66mm\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SharpStar_SCA310_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\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":52851347718429,"sku":"SSO-SCA310","price":11193.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-SCA310-1_df2ed418-69a4-4967-82b4-11f294440cc2.jpg?v=1788401926"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/sharpstar-optics-telescopes.oembed","provider":"David Astro","version":"1.0","type":"link"}