{"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\/products\/explore-scientific-es-fcd100-0806-ff","provider":"David Astro","version":"1.0","type":"link"}