{"product_id":"zwo-110mm-quad-apo-refractor","title":"ZWO FF110 APO 110mm f\/7 Quadruplet Refractor","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image1_7155ff2b-e664-4cb2-8dee-7a3eb1de1021.jpg?v=1781041776\" alt=\"ZWO FF110 APO flat-field apochromatic refractor\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eZWO FF110 APO\u003c\/strong\u003e is a 110mm f\/7 quadruplet apochromatic refractor with a built-in field flattener and a full-frame 44mm image circle. At 766mm focal length it brings smaller galaxies and planetary nebulae within reach, while staying light enough (5.74kg \/ 12.7lb) for a portable harmonic mount.\u003c\/p\u003e\n\n\u003ch2\u003eWhy choose the ZWO FF110 APO\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo field flattener needed:\u003c\/strong\u003e the four-element, air-spaced optical design delivers a flat field with sharp stars to the corners, straight out of the box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForgiving back focus:\u003c\/strong\u003e no precise spacing calculations. If you can reach focus, your stars will be sharp.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-frame coverage:\u003c\/strong\u003e a 44mm image circle supports full-frame, APS-C and dedicated astronomy cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcellent color correction:\u003c\/strong\u003e one ED (extra-low dispersion) element keeps stars tight and free of color fringing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for imaging:\u003c\/strong\u003e 3\" dual-speed rack-and-pinion focuser with 1:10 fine focus, a 360° camera rotator, and a photography extension tube with M48 and M54 adapters included.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy to mount accessories:\u003c\/strong\u003e the handle doubles as a guide scope mount, with extra finder bases on both sides of the focuser (a great spot for an ASIAIR).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTravel friendly:\u003c\/strong\u003e retractable dew shield, quick-release tube rings and a CNC-machined tube with anti-reflection coating inside.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAstrophotography and visual observing with the FF110 APO\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDeep-sky imaging of galaxies, planetary nebulae and smaller targets at 766mm\u003c\/li\u003e\n\u003cli\u003eFull-frame, APS-C and ZWO ASI cameras, with a wide 42-73mm back focus window\u003c\/li\u003e\n\u003cli\u003eHigh-resolution visual observing of the Moon, planets and double stars\u003c\/li\u003e\n\u003cli\u003eObservatory or portable setups on the ZWO AM5N or AM7\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image5.jpg?v=1781041776\" alt=\"ZWO FF110 APO setups for astronomy cameras, DSLR and mirrorless cameras, and visual observing\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\n\u003ch2\u003eZWO FF110 APO specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e110mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal length\u003c\/td\u003e\n\u003ctd\u003e766mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical design\u003c\/td\u003e\n\u003ctd\u003eFour-element air-spaced APO (one ED element), built-in field flattener\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage circle\u003c\/td\u003e\n\u003ctd\u003e44mm (full-frame)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focus\u003c\/td\u003e\n\u003ctd\u003eFocus is achieved anywhere from 42mm to 73mm from the M48x0.75 thread (60mm to 91mm from the M54x0.75 thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" dual-speed rack-and-pinion, 1:10 fine focus, 360° rotator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear adapters\u003c\/td\u003e\n\u003ctd\u003eM78x1 55mm extension adapter, M78x1-M54x0.75, M54x0.75-M54x0.75, M54x0.75-M48x0.75 (built-in M48 filter thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003e300mm Vixen-style dovetail plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall length\u003c\/td\u003e\n\u003ctd\u003e664mm (1.25\" interface retracted) to 815mm (extension tube and dew shield extended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical tube weight\u003c\/td\u003e\n\u003ctd\u003e5.74kg (12.7lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard configuration weight\u003c\/td\u003e\n\u003ctd\u003e6.76kg (14.9lb) with handle, tube rings and dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image16.jpg?v=1781041776\" alt=\"ZWO FF110 APO box contents: optical tube, photography extension tube, user manual, inspection sheet and warranty card\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFF110 APO optical tube with handle, tube rings and dovetail plate\u003c\/li\u003e\n\u003cli\u003ePhotography extension tube with M48 and M54 adapters\u003c\/li\u003e\n\u003cli\u003eUser manual, inspection sheet and warranty card\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDiagonal, eyepieces, camera and mount are sold separately.\u003c\/p\u003e\n\n\u003ch2\u003eCompare the ZWO FF APO refractors\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight (OTA)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/zwo-70mm-quad-apo-refractor\"\u003eFF70 APO\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e70mm\u003c\/td\u003e\n\u003ctd\u003e490mm (f\/7.0)\u003c\/td\u003e\n\u003ctd\u003e2.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/zwo-90mm-quad-apo-refractor\"\u003eFF90 APO\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e90mm\u003c\/td\u003e\n\u003ctd\u003e609mm (f\/6.8)\u003c\/td\u003e\n\u003ctd\u003e3.92kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cstrong\u003eFF110 APO\u003c\/strong\u003e (this scope)\u003c\/td\u003e\n\u003ctd\u003e110mm\u003c\/td\u003e\n\u003ctd\u003e766mm (f\/7.0)\u003c\/td\u003e\n\u003ctd\u003e5.74kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/zwo-131mm-quad-apo-refractor\"\u003eFF131 APO\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e131mm\u003c\/td\u003e\n\u003ctd\u003e983mm (f\/7.5)\u003c\/td\u003e\n\u003ctd\u003e7.9kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eZWO FF110 APO FAQ\u003c\/h2\u003e\n\n\u003ch3\u003eDo I need a field flattener with the FF110 APO?\u003c\/h3\u003e\n\u003cp\u003eNo. The FF110 APO has a built-in flattener, so stars stay sharp to the edges of a full-frame sensor without any extra optics. There's also no exact back focus distance to hit. Anywhere from 42mm to 73mm of spacing behind the M48 thread will reach focus, which covers most camera and filter setups.\u003c\/p\u003e\n\n\u003ch3\u003eCan I use the FF110 APO for visual observing?\u003c\/h3\u003e\n\u003cp\u003eYes. The focuser accepts 1.25\" and 2\" accessories, so you can add a star diagonal and eyepieces for visual use. These are sold separately.\u003c\/p\u003e\n\n\u003ch3\u003eWhat mount do I need for the FF110 APO?\u003c\/h3\u003e\n\u003cp\u003eWith a standard configuration weight of 6.76kg (14.9lb), the FF110 APO is a great match for the ZWO AM5N or AM7 once you add your camera and accessories. For a matched setup, see the \u003ca href=\"\/products\/zwo-110apo-am5n-bundle\"\u003eZWO 110APO + AM5N bundle\u003c\/a\u003e or the \u003ca href=\"\/products\/zwo-110apo-am7n-bundle-copy\"\u003eZWO 110APO + AM7 bundle\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhich cameras work with the FF110 APO?\u003c\/h3\u003e\n\u003cp\u003eDedicated astronomy cameras like ZWO ASI models, plus DSLR and mirrorless cameras using the appropriate T-ring. The 44mm image circle covers full-frame sensors, and the included M48 and M54 adapters fit most modern imaging trains.\u003c\/p\u003e\n\n\u003cp\u003eNot sure which ZWO refractor is right for you? Contact us and our team will help you choose.\u003c\/p\u003e\n","brand":"ZWO","offers":[{"title":"Default Title","offer_id":48334277116163,"sku":"ZWO FF110-APO","price":1499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FF110APO1_1296x_9d80b340-39af-4fea-b12d-7a8767410b3a.webp?v=1781122139","url":"https:\/\/milehighastro.com\/products\/zwo-110mm-quad-apo-refractor","provider":"Mile High Astronomy","version":"1.0","type":"link"}