{"title":"Astrographes Explore Scientific","description":"\u003cp\u003eLes astrographes Explore Scientific de cette collection sont des lunettes ED80 triplets à lame d'air livrées avec l'optique nécessaire à l'astrophotographie. Chaque ensemble associe un tube ED80 Essential Series ou ED80-FCD100 à un aplanisseur de champ, à un réducteur de focale 0.8x, ou aux deux. Un ensemble ajoute une monture iEXOS-100 PMC-Eight.\u003c\/p\u003e\u003cp\u003eAvec 80mm d'ouverture et un tube court et léger, ces ensembles conviennent à une première configuration d'astrophotographie du ciel profond ou à un équipement de voyage.\u003c\/p\u003e","products":[{"product_id":"explore-scientific-es-ed-0806-fr0-8x-iexos100","title":"Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor Telescope with 0.8x Focal Reducer and iEXOS-100-2 PMC-Eight Equatorial Tracker System","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e80mm Air-Spaced Apochromatic Triplet Refractor\u003c\/li\u003e\n\u003cli\u003eiEXOS-100-2 GoTo Equatorial Mount with PMC-Eight Controller\u003c\/li\u003e\n\u003cli\u003eIncludes 0.8x Two-Element Focal Reducer\u003c\/li\u003e\n\u003cli\u003e2.5-inch Hexagonal Focuser with 10 lb Load Capacity\u003c\/li\u003e\n\u003cli\u003eWireless Control via WiFi and Bluetooth\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\u003eED80 Essential Series Air-Spaced Triplet Refractor Telescope with 0.8x Focal Reducer and iEXOS-100-2 PMC-Eight Equatorial Tracker System\u003c\/h2\u003e\n\u003cp\u003eThis complete imaging package combines the Explore Scientific ED80 Essential Series 80mm Triplet Refractor with a 0.8x focal reducer and the iEXOS-100-2 PMC-Eight GoTo mount. The optical train is supported by a robust 2.5-inch hexagonal focuser capable of handling 10-pound imaging loads and includes a 99% reflective 2-inch diagonal for brilliant visual use.\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\u003e80mm ED Triplet \u0026amp; 2.5-inch Focuser for High-Contrast Views\u003c\/h3\u003e\n\u003cp\u003eAt the heart of this package is the ED80, a true apochromatic refractor featuring an air-spaced triplet optical design with genuine HOYA FCD1 extra-low dispersion (ED) glass. This design virtually eliminates chromatic aberration, producing sharp, high-contrast images with no distracting color fringing on bright objects like Jupiter or Vega. For astrophotography, this means pinpoint stars with true color from edge to edge.\u003c\/p\u003e\n\u003cp\u003eThe optical tube is equipped with a heavy-duty 2.5-inch hexagonal focuser, engineered to carry up to 10 pounds of camera equipment without flexure or image shift. This stability is critical when using DSLRs, cooled astronomy cameras, and filter wheels. The package also includes a 99% reflective 2-inch diagonal for visual observers seeking the brightest possible views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIncluded 0.8x Reducer for Faster, Wider-Field Astrophotography\u003c\/h3\u003e\n\u003cp\u003eThe included 0.8x focal reducer transforms the telescope into a faster, wider-field imaging instrument. By shortening the effective focal length, this two-element reducer significantly increases the speed of the optical system, allowing your camera to gather more light in less time. This reduces required exposure times, minimizing the impact of tracking errors and thermal noise.\u003c\/p\u003e\n\u003cp\u003eThis wider perspective is ideal for capturing expansive deep-sky objects like the Andromeda Galaxy (M31) or the Veil Nebula complex. The reducer terminates in a standard 42mm T2-thread, ensuring direct and secure connection to most DSLR and dedicated astronomy cameras via a T-ring.\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\u003eiEXOS-100-2 Mount with 8-Core PMC-Eight GoTo Control\u003c\/h3\u003e\n\u003cp\u003eThe iEXOS-100-2 is a German Equatorial Mount (GEM) that provides the precise tracking essential for long-exposure astrophotography. Its GEM design follows the sky's rotation on a single axis, preventing the field rotation that can ruin images taken on alt-azimuth mounts. At its core is the revolutionary PMC-Eight controller, which uses an 8-core microcontroller to deliver responsive, smooth, and accurate GoTo slewing and tracking.\u003c\/p\u003e\n\u003cp\u003eYou can control the mount wirelessly via WiFi or Bluetooth using the free ExploreStars app on Windows, Android, or Apple tablets. For advanced users, ASCOM compatibility allows the mount to interface with virtually any PC-based astronomy software. User-friendly features like a polar alignment tunnel, an integrated bubble level, and glow-in-the-dark markers make setup in the dark straightforward and efficient.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of astrophotography is this ED80 and iEXOS-100-2 package best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis package is optimized for wide-field deep-sky astrophotography of large nebulae, galaxies, and star clusters. The combination of the \u003cstrong\u003e80mm apochromatic optics\u003c\/strong\u003e and the \u003cstrong\u003e0.8x focal reducer\u003c\/strong\u003e creates a fast imaging system ideal for capturing faint, expansive targets. The \u003cstrong\u003eiEXOS-100-2 mount\u003c\/strong\u003e provides the accurate tracking necessary for crisp, long-exposure images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I control the iEXOS-100-2 mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iEXOS-100-2 mount can be controlled wirelessly using its built-in \u003cstrong\u003eWiFi or Bluetooth\u003c\/strong\u003e. You can use the free \u003cstrong\u003eExploreStars application\u003c\/strong\u003e on a Windows, Android, or Apple tablet (sold separately). Alternatively, you can connect it to a PC and use the ASCOM driver to control it with popular astronomy software like N.I.N.A., Sequence Generator Pro, or Stellarium.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to add to this ED80 package to start imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is a very complete package, but you will need to provide a few items:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eA Camera:\u003c\/strong\u003e A DSLR with a T-ring or a dedicated astronomy camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Source:\u003c\/strong\u003e The mount requires 8 'C' batteries (not included) or an external 12V DC power supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinder Scope:\u003c\/strong\u003e While a finder base is installed, a finder scope itself is not included and is recommended for initial alignment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the ED80 with the 0.8x reducer frame the entire North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an excellent system for very large targets like the North American Nebula (NGC 7000). The \u003cstrong\u003e0.8x focal reducer\u003c\/strong\u003e creates a wide field of view specifically designed to fit large celestial objects into the frame of a camera with an APS-C or smaller sensor, allowing you to capture the full expanse of such nebulae in a single shot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the iEXOS-100-2 mount sufficient for imaging Jupiter with the ED80?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While the package is optimized for wide-field imaging, the \u003cstrong\u003eiEXOS-100-2's precise equatorial tracking\u003c\/strong\u003e is also ideal for planetary work. For imaging Jupiter, you would typically remove the focal reducer and use a Barlow lens (not included) to increase magnification. The mount will keep the planet centered on your camera's small sensor for the high-frame-rate video capture used in planetary imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is an apochromatic triplet like the ED80 better than a standard doublet refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn apochromatic (APO) triplet uses a third lens element, including one made from \u003cstrong\u003eextra-low dispersion (ED) glass\u003c\/strong\u003e, to correct for chromatic aberration. Standard doublet refractors can struggle to bring all colors of light to the same focal point, resulting in a purple fringe around bright stars. The ED80's triplet design ensures all wavelengths focus together, yielding sharper images with true-to-life color and higher contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\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\"\u003eED80 Essential Series Air-Spaced Triplet Refractor Telescope\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\"\u003e0.8x Focal Reducer with Caps \u0026amp; Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eiEXOS-100-2 PMC-Eight Equatorial Tracker System\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\"\u003e99% Reflective 2-inch Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2.5-inch Hexagonal Focuser\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFocuser Extension Tubes\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHybrid Finder Scope Base\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBuilt-in Dew Shield\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDust Cover \/ Lens Cap\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Explore_Scientific_PMC-Eight_iEXOS-100_Booklet_English_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":52909134971165,"sku":"ES-ED-0806-FR0.8x-IEXOS100","price":1680.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-ED80-Essential-Series-Air-Spaced-Triplet-Refractor-Telescope-with-0-8x-Focal-Reducer-and-iEXOS-100-2-PMC-Eight-Equatorial-Tracker-System-1_0d2b6b4a-ae51-469b-9147-ecdbfa7e4f61.jpg?v=1789060438"},{"product_id":"explore-scientific-es-ed-0806-ff","title":"Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor Telescope + Field Flattener f\/5 to f\/7 (Bundle)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e80mm Aperture\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Apochromatic Triplet Optics\u003c\/li\u003e\n\u003cli\u003eFeatures HOYA FCD1 Extra-Low Dispersion Glass\u003c\/li\u003e\n\u003cli\u003eIncludes Field Flattener for f\/5 to f\/7 Telescopes\u003c\/li\u003e\n\u003cli\u003eRequires 55mm (+\/- 2mm) Camera Sensor Spacing\u003c\/li\u003e\n\u003cli\u003e2-inch Rack-and-Pinion Focuser\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eED80 Essential Series Air-Spaced Triplet Refractor Telescope + Field Flattener f\/5 to f\/7 (Bundle)\u003c\/h2\u003e\n\u003cp\u003eThis Explore Scientific ED80 Essential Series bundle pairs a true apochromatic 80mm triplet refractor with a matched field flattener designed for systems from f\/5 to f\/7. The included flattener ensures round stars across your camera sensor by correcting field curvature, requiring a precise 55mm spacing for optimal results. Its diffraction-limited optics, featuring HOYA FCD1 glass, deliver high-contrast images through its 2-inch rack-and-pinion focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eApochromatic 80mm Triplet Optics with HOYA FCD1 Glass\u003c\/h3\u003e\n\u003cp\u003eThe heart of the ED80 is its air-spaced triplet lens assembly, which provides true apochromatic correction. By using premium HOYA FCD1 extra-low dispersion glass, the optical design virtually eliminates chromatic aberration, preventing the distracting purple fringing seen on bright objects in lesser scopes. The result is a sharp, high-contrast view with neutral color, whether you're observing the bands of Jupiter or resolving tight double stars.\u003c\/p\u003e\n\u003cp\u003eAll optical surfaces feature Explore Scientific's proprietary EMD multi-layer coatings to maximize light transmission. This ensures the brightest possible images, allowing you to pull faint details out of deep-sky objects like the Orion Nebula (M42) or the Andromeda Galaxy (M31).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready: Bundled Field Flattener for f\/5 to f\/7 Systems\u003c\/h3\u003e\n\u003cp\u003eThis bundle is specifically designed for astrophotography. Refractors naturally exhibit field curvature, which can cause stars at the edge of an image to appear elongated or comatic, especially with larger camera sensors. This dedicated field flattener is designed to work with telescopes in the f\/5 to f\/7 focal ratio range, correcting this distortion to deliver sharp, point-like stars across the entire frame.\u003c\/p\u003e\n\u003cp\u003eTo achieve a perfectly flat field, the flattener requires a precise back focus distance of 55mm (+\/-2mm) from the flattener's shoulder to your camera's sensor. Note that this component is for photographic use only and is not intended for visual observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePortable Design with a 2-inch Rack-and-Pinion Focuser\u003c\/h3\u003e\n\u003cp\u003eThe ED80 Essential Series is built as a compact, lightweight \"grab-and-go\" instrument. It's easy to transport to a dark sky site and sets up in minutes on a light-to-medium duty mount, making it an ideal choice for spontaneous observing sessions or as a wide-field imaging scope to complement a larger instrument.\u003c\/p\u003e\n\u003cp\u003eFocusing is controlled by a 2-inch rack-and-pinion focuser, providing a stable and reliable mechanism for achieving sharp focus with both eyepieces and heavy imaging trains. The telescope also includes a pre-installed Hybrid Finder Scope Base, ready for your preferred pointing device.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"Apochromatic Triplet\" mean for the ED80's views?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn \u003cstrong\u003eApochromatic (APO) Triplet\u003c\/strong\u003e uses a three-lens objective to bring the red, green, and blue wavelengths of light to the same focal point. The ED80 uses an air-spaced design with \u003cstrong\u003eHOYA FCD1 glass\u003c\/strong\u003e to achieve this. The practical benefit is the near-total elimination of chromatic aberration, or false color, resulting in exceptionally sharp, high-contrast images with pure color rendition, especially on bright targets like the Moon, planets, and bright stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Field Flattener necessary for the ED80 Essential telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe field flattener is essential for astrophotography with a fast refractor like the ED80. It corrects for the natural curvature of the focal plane, which would otherwise cause stars at the edges of your photos to appear stretched or comatic. This bundle includes a flattener specifically matched for telescopes with focal ratios between \u003cstrong\u003ef\/5 and f\/7\u003c\/strong\u003e, ensuring your deep-sky images have sharp, pinpoint stars from corner to corner.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I achieve the required 55mm spacing for the ED80 and its field flattener?\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 a standard distance in astrophotography. It is measured from the rear flange of the field flattener to your camera's sensor. Most dedicated astronomy cameras and DSLR\/mirrorless cameras with a standard T-ring adapter are designed to meet this 55mm spacing requirement automatically. You may need additional M48 extension rings if your imaging train has other components like an off-axis guider or filter drawer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the ED80 Essential telescope for visual observing without the flattener?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The ED80 is an excellent visual instrument on its own. Simply remove the field flattener and insert a 2-inch or 1.25-inch diagonal and eyepiece into the focuser. Field curvature is generally not noticeable during visual observation, so the flattener is not needed or recommended for visual use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the ED80 and flattener perform on a wide-field target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis setup is ideal for large targets like the Andromeda Galaxy (M31). The ED80's short focal length provides a wide field of view, allowing you to capture the entire galaxy and its satellite companions in a single frame with most astronomy cameras. The field flattener ensures that the thousands of stars across the field remain sharp, preserving the stunning detail of M31's dust lanes and bright core.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ED80 a good choice for imaging planets like Saturn with a high-frame-rate camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the ED80 can show you Saturn's rings visually, it is primarily a wide-field instrument. For serious planetary imaging, a telescope with a much longer focal length (like an SCT or Maksutov) is preferred to achieve the necessary image scale. You can use a Barlow lens with the ED80 to increase its magnification for planetary work, but it is optimized for capturing large deep-sky objects, not fine planetary detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":52909164560669,"sku":"ES-ED-0806-FF","price":1120.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-ED80-Essential-Series-Air-Spaced-Triplet-Refractor-Telescope-Field-Flattener-f-5-to-f-7-Bundle-1_d41eed0b-1559-438d-892d-521000355774.jpg?v=1789060550"},{"product_id":"explore-scientific-es-fcd100-0806-fr0-8x-iexos100","title":"Explore Scientific ED80-FCD100 Air-Spaced Triplet Refractor Telescope with 0.8x Focal Reducer (Bundle)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e80mm Air-Spaced Triplet Apochromatic OTA\u003c\/li\u003e\n\u003cli\u003eIncludes a matched 0.8x Focal Reducer\u003c\/li\u003e\n\u003cli\u003eiEXOS-100 Equatorial Mount with GoTo\u003c\/li\u003e\n\u003cli\u003ePMC-Eight wireless control system\u003c\/li\u003e\n\u003cli\u003eIncludes two 2.2 lb counterweights\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\u003eED80-FCD100 Air-Spaced Triplet Refractor Telescope with 0.8x Focal Reducer (Bundle)\u003c\/h2\u003e\n\u003cp\u003eThis ED80-FCD100 Air-Spaced Triplet Refractor Telescope bundle assembles a complete astrophotography platform, combining an 80mm apochromatic optical tube with a matched 0.8x focal reducer for wide-field imaging. The system is supported by the iEXOS-100 GoTo mount and includes two 2.2 lb counterweights, creating a portable, ready-to-image package for capturing large nebulae and star fields.\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\u003e80mm FCD100 Triplet Optics: Apochromatic Color Correction\u003c\/h3\u003e\n\u003cp\u003eThe heart of this bundle is the 80mm air-spaced triplet refractor. This apochromatic design uses high-grade optical glass to virtually eliminate chromatic aberration, or false color, resulting in sharp, high-contrast images with pinpoint stars across the field.\u003c\/p\u003e\n\u003cp\u003eAn 80mm aperture provides an ideal balance between light-gathering power and portability. It's large enough to resolve detail in bright deep-sky objects like the Orion Nebula (M42) and the Andromeda Galaxy (M31), yet compact enough for easy transport to dark-sky sites.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIncluded 0.8x Reducer: Faster, Wider-Field Imaging\u003c\/h3\u003e\n\u003cp\u003eThe included 0.8x focal reducer is a critical component for serious astrophotography. By reducing the telescope's effective focal ratio, it shortens required exposure times, allowing you to collect more signal in less time and reducing the demands on your mount's tracking accuracy.\u003c\/p\u003e\n\u003cp\u003eThis accessory also widens the field of view, enabling you to frame large celestial targets that would otherwise not fit in a single shot. This makes the system exceptionally well-suited for imaging expansive emission nebulae and sprawling open star clusters.\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\u003eiEXOS-100 Mount: GoTo Pointing with 4.4 lbs of Counterweights\u003c\/h3\u003e\n\u003cp\u003eThis imaging package includes the Explore Scientific iEXOS-100 equatorial mount, a complete GoTo tracking system. Driven by the PMC-Eight controller, the mount can automatically locate and track thousands of celestial objects with commands from a connected tablet, smartphone, or PC.\u003c\/p\u003e\n\u003cp\u003eThe German equatorial design is essential for long-exposure astrophotography, as it tracks the sky's rotation on a single axis to prevent field rotation. The bundle includes a total of 4.4 lbs (two 2.2 lb weights) of counterweights to precisely balance the 80mm optical tube and any attached camera gear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of objects is the ED80-FCD100 bundle best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis bundle is optimized for wide-field astrophotography of large deep-sky objects. With the \u003cstrong\u003e80mm aperture\u003c\/strong\u003e and the \u003cstrong\u003e0.8x focal reducer\u003c\/strong\u003e, it excels at capturing targets like the North American Nebula (NGC 7000), the Andromeda Galaxy (M31), and the Heart and Soul Nebulae (IC 1805 and IC 1848).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 0.8x focal reducer change the ED80-FCD100's imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e0.8x focal reducer\u003c\/strong\u003e provides two main benefits for astrophotography:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWider Field of View:\u003c\/strong\u003e It expands the amount of sky you can capture in a single frame, making it easier to fit large objects into the image.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFaster Imaging:\u003c\/strong\u003e It reduces the telescope's f-ratio, which decreases the exposure time needed to capture faint details. This means you can gather more data in a shorter imaging session.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to control the iEXOS-100 mount's GoTo system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe iEXOS-100 mount is controlled by the \u003cstrong\u003ePMC-Eight system\u003c\/strong\u003e. You will need a computer, tablet, or smartphone running the ExploreStars II software (available for Windows, Android, and iOS). The mount creates its own wireless network, allowing you to connect and control it without a physical hand controller.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 4.4 lbs of counterweight with the ED80-FCD100 bundle enough?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the two included \u003cstrong\u003e2.2 lb counterweights\u003c\/strong\u003e (totaling 4.4 lbs) are supplied to balance the 80mm refractor optical tube and typical imaging equipment like a DSLR or a dedicated astronomy camera. Proper balance is crucial for the GoTo system's pointing accuracy and tracking stability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this ED80-FCD100 bundle to image the entire North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an excellent system for that target. The combination of the 80mm refractor and the 0.8x reducer is specifically designed to provide a wide field of view that can easily frame the entirety of very large objects like the North American Nebula (NGC 7000) or the Veil Nebula complex.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the ED80-FCD100 perform for visual observing of planets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the apochromatic optics will provide sharp, color-free views, an 80mm telescope is generally considered small for detailed planetary observation. You will see Jupiter's moons and its two main cloud bands, but resolving fine detail like the Great Red Spot will be challenging. This bundle is primarily designed for wide-field imaging, not high-magnification planetary viewing.\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\u003eBundle Components\u003c\/td\u003e\n\u003ctd\u003eFCD100-0806-FR0.8x -- 80mm Air-Spaced Triplet Apochromat Refractor Telescope OTA with 0.8x Focal Reducer; ES-iEXOS-100-02 -- iEXOS Equatorial Mount and Tripod with GoTo PMC-Eight System (gtin 811803030190); 2x ES-CW22-00 -- iEXOS-100 Counterweight 2.2 Pounds (gtin 811803036314)\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\"\u003e80mm Air-Spaced Triplet Apochromat Refractor Telescope OTA with Accessories\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\"\u003e0.8x Focal Reducer\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\"\u003eiEXOS-100-02 Equatorial Mount and Tripod with GoTo PMC-Eight System\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\"\u003eiEXOS-100 Counterweight (2.2 lbs)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":52909183828253,"sku":"ES-FCD100-0806-FR0.8x-IEXOS100","price":2380.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-ED80-FCD100-Air-Spaced-Triplet-Refractor-Telescope-with-0-8x-Focal-Reducer-Bundle-1_62475710-fd7c-4915-adbd-6e5f6a0ab461.jpg?v=1789060610"},{"product_id":"explore-scientific-es-fcd100-0806-ff-iexos100","title":"Explore Scientific ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope (Bundle)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eComplete astrophotography bundle with 80mm triplet refractor and GoTo mount\u003c\/li\u003e\n\u003cli\u003e80mm aperture and 480mm focal length for wide-field imaging\u003c\/li\u003e\n\u003cli\u003eHOYA FCD100 ED glass for superior chromatic aberration correction\u003c\/li\u003e\n\u003cli\u003eiEXOS-100 mount supports a 19 lb payload with PMC-Eight wireless control\u003c\/li\u003e\n\u003cli\u003eIncludes a field flattener designed for f\/5 to f\/7 systems\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\u003eED80-FCD100 Series Air-Spaced Triplet Refractor Telescope (Bundle)\u003c\/h2\u003e\n\u003cp\u003eThis Explore Scientific ED80-FCD100 bundle combines a premium 80mm triplet refractor with a portable GoTo equatorial mount, creating a complete astrophotography system ready for the field. The optical tube features a 480mm focal length and genuine HOYA FCD100 ED glass for color-true, high-contrast images, supported by a robust 2.5\" hexagonal focuser that holds up to 10 lbs of camera gear. The included iEXOS-100 mount carries a total payload of 19 lbs, easily handling the lightweight 7.5 lb telescope and your imaging train. With a dedicated field flattener and two 2.2 lb counterweights included, this package provides everything needed to start capturing stunning wide-field images of deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eED80 Triplet: 80mm Aperture with HOYA FCD100 Glass\u003c\/h3\u003e\n\u003cp\u003eThe core of this bundle is the ED80 refractor, an air-spaced triplet designed for pristine imaging. Its 80mm objective lens uses HOYA FCD100 extra-low dispersion glass, which provides chromatic aberration correction comparable to Ohara's FPL-53. This design virtually eliminates false color, ensuring stars are sharp, pinpoint sources of light with accurate color fidelity. The 480mm focal length offers a wide field of view, perfect for framing large nebulae and star clusters, while Explore Scientific's EMD multi-layer coatings maximize light transmission for brighter, more detailed views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eField Flattener for f\/5 to f\/7 Systems\u003c\/h3\u003e\n\u003cp\u003eAstrophotography with fast refractors reveals field curvature, causing stars at the edge of the frame to appear elongated. This bundle includes a field flattener specifically designed to correct this aberration in optical systems from f\/5 to f\/7. It creates a flat focal plane across your entire camera sensor, ensuring sharp stars from corner to corner. The flattener requires a precise back focus of 55mm (+\/- 2mm) between the unit and your sensor, a standard distance easily achieved with most DSLRs and dedicated astronomy cameras using common adapters.\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\u003eiEXOS-100: 19 lb Payload with PMC-Eight Control\u003c\/h3\u003e\n\u003cp\u003eThe iEXOS-100 is a sophisticated yet portable German equatorial mount. Its PMC-Eight control system uses 8 independent CPUs to deliver precise, responsive, and reliable GoTo slewing and tracking. With a total payload capacity of 19 lbs, it provides a stable platform for the 7.5 lb ED80 and a full imaging rig. Built-in WiFi and Bluetooth allow for complete wireless control from a tablet or PC using the free ExploreStars app or any ASCOM-compatible software, giving you access to a vast database of celestial objects from a user-friendly interface.\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 Complete 7.5 lb Astrophotography Rig\u003c\/h3\u003e\n\u003cp\u003eThis package is engineered as a cohesive imaging solution. The lightweight 7.5 lb optical tube is perfectly matched to the mount's 19 lb capacity, leaving ample margin for cameras, guide scopes, and other accessories. The bundle includes two 2.2 lb counterweights to achieve perfect balance. From the integrated polar sight hole for quick alignment to the wireless GoTo control and imaging-specific optics, this ED80 bundle is a powerful, portable, and complete system for capturing the night sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of camera is recommended for the ED80-FCD100 bundle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis bundle is ideal for both \u003cstrong\u003eDSLR\/mirrorless cameras\u003c\/strong\u003e and \u003cstrong\u003ededicated astronomy cameras\u003c\/strong\u003e with APS-C or smaller sensors. The critical factor is achieving the required \u003cstrong\u003e55mm back focus\u003c\/strong\u003e from the field flattener's rear flange to the camera sensor. Most DSLRs naturally meet this spacing with a standard T-ring, while astronomy cameras may require a combination of extension tubes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow should I power the iEXOS-100 mount for a full night of imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe included battery pack uses \u003cstrong\u003e8 C-cell batteries\u003c\/strong\u003e, which may provide less than two hours of operation. For a full night, it is highly recommended to use an external power source. A \u003cstrong\u003e12V DC lithium-ion power bank\u003c\/strong\u003e or a compatible \u003cstrong\u003eAC power adapter\u003c\/strong\u003e will provide stable voltage and reliable performance for long imaging sessions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this ED80-FCD100 bundle for visual observation?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the ED80 telescope itself is an excellent visual instrument. However, the included \u003cstrong\u003efield flattener is for photographic use only\u003c\/strong\u003e and cannot be used with an eyepiece. To use the telescope visually, simply remove the flattener and insert a 2\" or 1.25\" diagonal and eyepiece directly into the 2.5\" focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I image the Andromeda Galaxy (M31) with this 480mm focal length setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The 480mm focal length is nearly ideal for framing the Andromeda Galaxy (M31). When paired with an APS-C sensor, the entire galaxy, including its faint outer arms and satellite galaxies M32 and M110, will fit comfortably within a single frame, making this a perfect wide-field system for large targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the iEXOS-100 track an object like the Orion Nebula (M42) for long exposures?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAfter a proper polar alignment using the built-in sight hole, the iEXOS-100's PMC-Eight system provides precise sidereal tracking. The German equatorial design prevents field rotation, which is critical for long exposures on deep-sky objects like the Orion Nebula (M42). For exposures longer than a minute, pairing this system with a separate autoguiding setup will yield the sharpest possible results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat software do I need to control the iEXOS-100 mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou can control the mount wirelessly with the free \u003cstrong\u003eExploreStars app\u003c\/strong\u003e, available for Windows, Android, Amazon Fire, and Apple tablets. The mount is also fully \u003cstrong\u003eASCOM compliant\u003c\/strong\u003e. By installing the PMC-Eight ASCOM driver on a Windows PC, you can control it with most popular astronomy software, such as N.I.N.A., Sequence Generator Pro, or Stellarium.\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\u003eTelescope Optical Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Triplet Apochromatic Refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e480mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Glass\u003c\/td\u003e\n\u003ctd\u003eHOYA FCD100 ED Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced Multilayer Deposition (EMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2.5\" Hexagonal Rack-and-Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Capacity\u003c\/td\u003e\n\u003ctd\u003e10 lbs (4.5 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Weight\u003c\/td\u003e\n\u003ctd\u003e7.5 lbs (3.4 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type\u003c\/td\u003e\n\u003ctd\u003eGerman Equatorial GoTo Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Control System\u003c\/td\u003e\n\u003ctd\u003ePMC-Eight Precision Motion Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Payload Capacity\u003c\/td\u003e\n\u003ctd\u003e19 lbs (8.6 kg) total\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectivity\u003c\/td\u003e\n\u003ctd\u003eWiFi and Bluetooth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Flattener Compatibility\u003c\/td\u003e\n\u003ctd\u003ef\/5 to f\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Flattener Back Focus\u003c\/td\u003e\n\u003ctd\u003e55mm (±2mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCounterweights Included\u003c\/td\u003e\n\u003ctd\u003e2 x 2.2 lb (1 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Power\u003c\/td\u003e\n\u003ctd\u003e8x C-Cell Batteries (not included) or external 12V DC\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\"\u003eED80-FCD100 Triplet Refractor 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\"\u003eiEXOS-100 PMC-Eight GoTo Equatorial Mount\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\"\u003eField Flattener for f\/5-f\/7 Systems\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\"\u003eTripod with Accessory Tray\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\"\u003e2.2 lb Counterweight\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBattery Pack for Mount\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Explore_Scientific_PMC-Eight_iEXOS-100_Booklet_English_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":52909188284701,"sku":"ES-FCD100-0806-FF-IEXOS100","price":2380.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-ED80-FCD100-Series-Air-Spaced-Triplet-Refractor-Telescope-Bundle-1_2ba20f7a-b0f2-40a2-a9ad-8842200a6e3d.jpg?v=1789060638"},{"product_id":"explore-scientific-es-fcd100-0806-fr0-8x","title":"Explore Scientific ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope + 0.8x Focal Reducer (Bundle)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e80mm Aperture\u003c\/li\u003e\n\u003cli\u003e480mm Focal Length (f\/6)\u003c\/li\u003e\n\u003cli\u003eHOYA FCD100 ED Air-Spaced Triplet Optics\u003c\/li\u003e\n\u003cli\u003eIncludes 0.8x Focal Reducer\/Corrector\u003c\/li\u003e\n\u003cli\u003e2.5\" Hexagonal Focuser\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope + 0.8x Focal Reducer (Bundle)\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific ED80-FCD100 bundle combines an 80mm air-spaced triplet objective with a native 480mm focal length, engineered for high-contrast, color-pure astronomical views. This package includes a dedicated 0.8x focal reducer, transforming the f\/6 optical system into a faster wide-field instrument for astrophotography. Built with genuine HOYA FCD100 ED glass and weighing only 7.5 lbs, this refractor delivers true apochromatic color correction in a highly portable design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eApochromatic Optics: The 80mm FCD100 Triplet Design\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the ED80 is an 80mm air-spaced triplet objective featuring HOYA FCD100 glass, an extra-low dispersion material that virtually eliminates chromatic aberration. This design ensures that all wavelengths of light come to the same sharp focus, resulting in images free of distracting purple fringing around bright stars and planetary limbs. The optical quality is comparable to more expensive FPL-53-based refractors, providing true-to-life color fidelity and exceptional contrast for both visual observation and critical imaging.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHOYA FCD100 Glass:\u003c\/strong\u003e Delivers superior correction of false color, rendering crisp, high-fidelity views of targets like Jupiter's cloud bands and the Moon's terminator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEMD Multi-Layer Coatings:\u003c\/strong\u003e Proprietary coatings on all optical surfaces maximize light transmission and minimize reflections, producing brighter, higher-contrast images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir-Spaced Triplet:\u003c\/strong\u003e This advanced optical configuration allows for precise control over light dispersion, achieving a true apochromatic flat-field image.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready Mechanics: A 2.5\" Focuser in a 7.5 lb Package\u003c\/h3\u003e\n\u003cp\u003eEngineered for astrophotography, the ED80 is built around a robust 2.5\" hexagonal focuser capable of supporting imaging trains up to 10 lbs without flexure or slippage. The lightweight 7.5 lb optical tube is easy to manage on a wide range of equatorial mounts, making it an ideal grab-and-go instrument. While its 80mm aperture is perfect for wide-field targets, it also serves as a high-end guide scope for larger primary telescopes, offering pinpoint stars for precise tracking.\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\u003eWide-Field Astrophotography: The Bundled 0.8x Focal Reducer\u003c\/h3\u003e\n\u003cp\u003eThis bundle includes the Explore Scientific 0.8x Focal Reducer, which converts the telescope into a faster f\/4.8 system with a 384mm focal length. This wider, faster configuration allows your camera to capture more light in shorter exposures, revealing faint details in large emission nebulae like the North American Nebula (NGC 7000) or framing the entirety of the Andromeda Galaxy (M31). The reducer provides a corrected image circle and is threaded for standard 42mm T-rings, with a precise back focus of 55mm for connecting a DSLR or dedicated astronomy camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the HOYA FCD100 glass in the ED80 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage of \u003cstrong\u003eHOYA FCD100\u003c\/strong\u003e extra-low dispersion (ED) glass is its ability to suppress chromatic aberration, or false color. This results in sharper, higher-contrast images with true color fidelity, eliminating the purple halos often seen around bright stars in less-corrected telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the focal length and f-ratio of the ED80 when using the 0.8x reducer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhen the 0.8x reducer is attached, the ED80's effective focal length is shortened from 480mm to \u003cstrong\u003e384mm\u003c\/strong\u003e. This also makes the optical system faster, changing the focal ratio from f\/6 to \u003cstrong\u003ef\/4.8\u003c\/strong\u003e, which significantly reduces exposure times needed for deep-sky astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect my DSLR or astro camera to the 0.8x focal reducer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe reducer is designed with a standard back focus of \u003cstrong\u003e55mm (+\/- 2mm)\u003c\/strong\u003e and is threaded to accept a standard \u003cstrong\u003e42mm T-ring\u003c\/strong\u003e (M42x0.75). You will need a T-ring specific to your camera's brand (e.g., Canon, Nikon, Sony) to attach it to the reducer, followed by any necessary spacers to achieve the correct 55mm distance to your camera's sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 7.5 lb ED80-FCD100 suitable for a lightweight portable mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. At just \u003cstrong\u003e7.5 lbs\u003c\/strong\u003e, the ED80 optical tube is an excellent match for portable German equatorial mounts like the Explore Scientific iEXOS-100 or Sky-Watcher Star Adventurer GTi. This combination creates a powerful and easily transportable setup for wide-field imaging from dark sky locations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this ED80-FCD100 bundle to image large targets like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this bundle is ideal for large targets. With the \u003cstrong\u003e0.8x reducer\u003c\/strong\u003e, the 384mm focal length provides a wide field of view that can easily frame the full extent of the Andromeda Galaxy (M31), the Pleiades (M45), or large nebulae like the Orion Nebula (M42), especially when paired with a camera that has an APS-C or larger sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the 2.5\" hexagonal focuser on the ED80 special?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e2.5\" hexagonal focuser\u003c\/strong\u003e provides a more rigid and stable drawtube than traditional round Crayford focusers. This design significantly reduces flex and tilt, especially when supporting heavier imaging equipment up to its \u003cstrong\u003e10 lb capacity\u003c\/strong\u003e. This ensures the camera sensor remains perfectly perpendicular to the optical axis for sharp stars across the entire frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e480mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Triplet Apochromat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eHOYA FCD100 ED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2.5\" Hexagonal Rack-and-Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Weight\u003c\/td\u003e\n\u003ctd\u003e7.5 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReducer Factor\u003c\/td\u003e\n\u003ctd\u003e0.8x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReduced Focal Length\u003c\/td\u003e\n\u003ctd\u003e384mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReduced Focal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReducer Back Focus\u003c\/td\u003e\n\u003ctd\u003e55mm (+\/- 2mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReducer Camera Thread\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 T-Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBundle Components\u003c\/td\u003e\n\u003ctd\u003eFCD100-0806-02 -- 80mm Triplet OTA (gtin 8122570176076); ES-FR0.8x -- 0.8x Focal Reducer (gtin 811803035881)\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\"\u003e80mm Air-Spaced Triplet Apochromat Refractor Telescope Optical Tube Assembly with Accessories\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\"\u003e0.8x Focal Reducer for f\/5 to f\/7 Refractors\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Explore_Scientific_Introduction_Booklet_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":52909192053021,"sku":"ES-FCD100-0806-FR0.8x","price":1820.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-ED80-FCD100-Series-Air-Spaced-Triplet-Refractor-Telescope-0-8x-Focal-Reducer-Bundle-1_5f6d005f-b10d-4b98-943f-124e413262eb.jpg?v=1789060650"},{"product_id":"explore-scientific-es-fcd100-0806-ff","title":"Explore Scientific ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope + Field Flattener f\/5 to f\/7 (Bundle)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e80mm Aperture Triplet Apochromatic Refractor\u003c\/li\u003e\n\u003cli\u003eFeatures Hoya FCD100 ED Glass Element\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Triplet Objective Lens\u003c\/li\u003e\n\u003cli\u003eIncludes Field Flattener for f\/5 to f\/7 Systems\u003c\/li\u003e\n\u003cli\u003eDesigned for Wide-Field Astrophotography\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eED80-FCD100 Series Air-Spaced Triplet Refractor Telescope + Field Flattener f\/5 to f\/7 (Bundle)\u003c\/h2\u003e\n\u003cp\u003eThis Explore Scientific ED80-FCD100 bundle combines an 80mm apochromatic triplet refractor with a matched field flattener, creating a complete optical system for wide-field astrophotography. The included flattener is engineered to produce sharp, pinpoint stars across the entire frame on refractors operating from f\/5 to f\/7. This package is built from the ground up to deliver high-contrast, color-pure images free of distracting chromatic aberration and field curvature.\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\u003e80mm FCD100 Triplet: True Apochromatic Color Correction\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the ED80 is an 80mm air-spaced triplet objective featuring a Hoya FCD100 extra-low dispersion (ED) glass element. This three-lens design corrects for false color far more effectively than a standard doublet, virtually eliminating the purple fringing seen around bright stars and planetary limbs. The result is a true apochromatic image with sharp focus across the visual spectrum, revealing subtle color variations in nebulae and star clusters.\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\u003eFlat-Field Imaging Ready: The Included f\/5-f\/7 Flattener\u003c\/h3\u003e\n\u003cp\u003eRefractor optics naturally produce a curved focal plane, resulting in elongated stars at the edge of an image sensor. This bundle includes the Explore Scientific Field Flattener for f\/5 to f\/7 refractors, which corrects this aberration. By installing the flattener, you ensure that stars remain tight and round from the center of your image to the corners, a critical requirement for producing professional-quality astrophotographs.\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\u003eED80 Triplet vs. Doublet: A Core Imaging Choice\u003c\/h3\u003e\n\u003cp\u003eFor astrophotographers choosing an 80mm refractor, the primary decision is between a two-lens doublet and a three-lens triplet design. While an ED doublet offers a lighter, faster-cooling, and more affordable package, its color correction is inherently limited.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriplet Advantage:\u003c\/strong\u003e The FCD100 triplet's third lens element provides a higher degree of color correction, essential for imaging with sensitive color cameras and for pushing magnification in visual use. There is no need to compromise on exposure time or processing techniques to hide chromatic aberration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoublet Trade-off:\u003c\/strong\u003e A doublet is often sufficient for casual visual use or narrowband imaging where color fringing is less of a concern. However, for one-shot-color imaging of star fields and bright nebulae, the triplet's superior color fidelity is immediately apparent.\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 astrophotography is the ED80-FCD100 bundle best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis \u003cstrong\u003e80mm triplet refractor\u003c\/strong\u003e is ideal for wide-field deep-sky imaging. It excels at capturing large targets like the Andromeda Galaxy (M31), the North American Nebula (NGC 7000), and the Pleiades star cluster (M45) with excellent color correction and a flat field thanks to the included flattener.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the included field flattener improve images with the ED80?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe field flattener corrects for the natural field curvature of the refractor's optics. Without it, stars at the edges of your camera sensor would appear stretched or out of focus. The flattener ensures a sharp, flat focal plane across the entire imaging sensor, making your final images look professional and clean from corner to corner.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Explore Scientific ED80-FCD100 for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While optimized for imaging, the ED80 is a superb visual instrument. Its apochromatic optics provide high-contrast, color-free views of the Moon, planets, and bright double stars. For visual use, you would simply remove the field flattener and use a standard star diagonal and eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the ED80-FCD100 imaging bundle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor astrophotography with the \u003cstrong\u003eED80-FCD100\u003c\/strong\u003e, a stable German equatorial mount with GoTo capability is highly recommended. A mount with a payload capacity of at least 20-25 lbs, such as an Explore Scientific iEXOS-100, Sky-Watcher HEQ5, or similar class mount, will provide the stability needed for sharp, long-exposure images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the ED80-FCD100 perform on the Heart Nebula (IC 1805)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ED80's field of view is perfectly suited for framing large emission nebulae like the Heart Nebula (IC 1805) and the nearby Soul Nebula (IC 1848). When paired with a duo-narrowband filter, the triplet optics will produce sharp, high-contrast images revealing the intricate hydrogen-alpha structures within the nebula against a dark sky background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 80mm aperture of the ED80-FCD100 enough for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, an \u003cstrong\u003e80mm apochromatic refractor\u003c\/strong\u003e can provide excellent views of planets. You can expect to see Jupiter's main cloud belts and its four Galilean moons, the rings of Saturn, and polar ice caps on Mars when seeing conditions are good. Using a high-quality Barlow lens will help achieve the necessary magnification for detailed planetary observation.\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\u003eBundle Components\u003c\/td\u003e\n\u003ctd\u003eFCD100-0806-02 -- 80mm Air-Spaced Triplet Apochromat Refractor Telescope Optical Tube Assembly with Accessories (gtin 8122570176076); ES-FF2F5\/F7 -- Field Flattener for f\/5 to f\/7 Refractors (gtin 811803034297)\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\"\u003e80mm Air-Spaced Triplet Apochromat Refractor Telescope Optical Tube Assembly with Accessories\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\"\u003eField Flattener for f\/5 to f\/7 Refractors\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":52909197263133,"sku":"ES-FCD100-0806-FF","price":1820.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-ED80-FCD100-Series-Air-Spaced-Triplet-Refractor-Telescope-Field-Flattener-f-5-to-f-7-Bundle-1_c8edd3d9-eec1-498a-b875-c9a545947481.jpg?v=1789060675"}],"url":"https:\/\/davidastro.com\/fr-us\/collections\/explore-scientific-astrographs.oembed","provider":"David Astro","version":"1.0","type":"link"}