{"product_id":"sky-watcher-skymax-200dx-maksutov-cassegrain-telescope","title":"Sky-Watcher Skymax 200DX Maksutov-Cassegrain Telescope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e200mm (8-inch) Maksutov-Cassegrain Optical Tube\u003c\/li\u003e\n\u003cli\u003e2000mm Focal Length at f\/10\u003c\/li\u003e\n\u003cli\u003e44mm Image Height for Full-Frame Imaging\u003c\/li\u003e\n\u003cli\u003eZero Shift Belt-Drive Focuser with Focus Distance Indicator\u003c\/li\u003e\n\u003cli\u003eBuilt-In 12V Cooling Fan with Battery Pack\u003c\/li\u003e\n\u003cli\u003e94% Reflectivity RAQ Mirror Coatings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSky-Watcher Skymax 200DX Maksutov-Cassegrain Telescope\u003c\/h2\u003e\n\u003cp\u003eThe Sky-Watcher Skymax 200DX brings the high contrast of the Skymax Maksutov-Cassegrain series to a 200mm aperture with a 2000mm focal length at f\/10. Beyond sharp lunar and planetary views, it delivers a 44mm image height for full-frame cameras, and the optional 0.7x reducer turns it into a 1400mm f\/7 imaging instrument. A Zero Shift belt-drive focuser and a built-in cooling fan address the two classic weak points of large Maksutovs: mirror shift and slow cool-down.\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\u003e2000mm Focal Length in a 665mm Tube\u003c\/h3\u003e\n\u003cp\u003eThe folded Maksutov-Cassegrain light path packs a 2000mm focal length into an optical tube just 665mm long and 235mm in diameter. The tube is only about a third as long as its focal length, but at 12 kg (26.46 lbs) the Skymax 200DX is still a heavy telescope that calls for a solid equatorial mount and is best suited to a permanent installation.\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\u003e44mm Image Height for Full-Frame Sensors\u003c\/h3\u003e\n\u003cp\u003eTraditional Maksutovs are built mainly for visual and planetary use. The Skymax 200DX is designed with a 44mm image height, wide enough to cover full-frame camera sensors, so it doubles as a deep-sky imaging telescope for galaxies, planetary nebulae and globular clusters.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional 0.7x Reducer (S20224):\u003c\/strong\u003e Brings the system to 1400mm at f\/7 with a 43mm image circle, a standard M48 thread and 55mm of back focus, cutting exposure times roughly in half.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNative f\/10 Imaging:\u003c\/strong\u003e Use the full 2000mm focal length for small galaxies, planetary nebulae and high-resolution lunar mosaics.\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\u003eZero Shift Focusing and Active Cooling\u003c\/h3\u003e\n\u003cp\u003eThe Zero Shift belt-drive focuser is designed to significantly reduce the mirror shift that makes focusing large catadioptric telescopes frustrating, and a focus distance indicator from 38m to infinity shows where you are in the focus range. A built-in 12V cooling fan and cooling vents help the optics reach ambient temperature faster, so you get steady, sharp views sooner after setting up.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e94% Reflectivity RAQ Mirrors and MHTC Corrector\u003c\/h3\u003e\n\u003cp\u003eThe Skymax 200DX mirrors are made of borosilicate and coated with Sky-Watcher's Radiant Aluminum Quartz (RAQ) coatings for 94% reflectivity. The fully multi-coated corrector plate uses Sky-Watcher's Metallic High-Transmission Coatings (MHTC) to maximize transmission and contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Skymax 200DX compare with the Skymax 180?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Skymax 200DX gathers about 23% more light than the 180mm Skymax 180. Its 2000mm focal length at f\/10 is shorter and faster than the 2700mm at f\/15 of the Skymax 180, giving a wider field of view and shorter exposures, and its 44mm image height is designed for imaging with large sensors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Skymax 200DX for deep-sky astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With a 44mm image height it covers full-frame sensors at its native f\/10. For shorter exposures, the optional Skymax 200DX 0.7x Reducer (S20224) brings it to 1400mm at f\/7 with a 43mm image circle and 55mm of back focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat mount do I need for the Skymax 200DX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe optical tube weighs 12 kg (26.46 lbs) and mounts with a D-style dovetail plate. For visual use and especially for imaging, choose a solid equatorial mount with a D-style (Losmandy-style) saddle and generous payload headroom, such as a mount in the Sky-Watcher EQ6-R class.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the cooling fan for, and how is it powered?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eLarge closed-tube telescopes take time to cool to the night air, and until they do, tube currents soften the image. The built-in 12V fan and cooling vents speed up this process. The Skymax 200DX includes a battery pack to power the fan.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow large is the central obstruction?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe secondary mirror is 70mm in diameter, and the total central obstruction is 22% by area.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2-inch eyepieces and diagonals?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Skymax 200DX includes a 2-inch visual back, so you can use 2-inch diagonals and eyepieces, as well as 1.25-inch accessories with a suitable adapter. A camera extender adapter is also included for imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e810098970891\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eOptical Specifications\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2000mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Height\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e70mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Obstruction (by area)\u003c\/td\u003e\n\u003ctd\u003e22%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Material\u003c\/td\u003e\n\u003ctd\u003eBorosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ), 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Coatings\u003c\/td\u003e\n\u003ctd\u003eFully multi-coated (MHTC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eOptional Reducer\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReducer Name\u003c\/td\u003e\n\u003ctd\u003eSkymax 200DX 0.7x Reducer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eS20224\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReduction\u003c\/td\u003e\n\u003ctd\u003e0.7x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReduced Focal Length\u003c\/td\u003e\n\u003ctd\u003e1400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReduced Focal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e43mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eMechanical Specifications\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eZero Shift belt-drive with focus distance indicator (38m to infinity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVisual Back\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling\u003c\/td\u003e\n\u003ctd\u003eBuilt-in 12V fan with cooling vents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinder Shoes\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eD-style dovetail plate (75mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e665mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Diameter\u003c\/td\u003e\n\u003ctd\u003e235mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e12 kg (26.46 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSkymax 200DX Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2-inch Visual Back\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\"\u003eCamera Extender 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\"\u003eD-Style Dovetail Plate\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCooling Fan Battery Pack\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/sky-watcher-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSky-Watcher 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":67666298241309,"sku":"SW-S11560","price":2195.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/S11560_SkyMax200DX_OTA_LeftFront.jpg?v=1790967023","url":"https:\/\/davidastro.com\/en-us\/products\/sky-watcher-skymax-200dx-maksutov-cassegrain-telescope","provider":"David Astro","version":"1.0","type":"link"}