{"product_id":"celestron-riduttore-focale-0-7x-edge-hd-800","title":"Celestron Focal Reducer 0.7x for Edge HD 800","description":"\u003cp\u003eThe \u003cstrong\u003eCelestron 0.7x focal reducer for Edge HD 800\u003c\/strong\u003e (item 94242) is the official optical accessory that brings the EdgeHD 800 system from f\/10 to \u003cstrong\u003ef\/7\u003c\/strong\u003e, halving exposure times and widening the field of view by 43%. Its 4-element design in \u003cstrong\u003elanthanum and rare-earth glass\u003c\/strong\u003e preserves the signature flat-field correction of the Edge HD system, delivering pinpoint stars from center to edge — perfect for imaging nebulae, galaxies, and clusters with cooled CMOS cameras or modified DSLRs on sensors up to APS-C format.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Design Dedicated to the Edge HD 800\u003c\/h2\u003e\n\u003cp\u003eUnlike generic focal reducers, this accessory is optically computed specifically for the Edge HD 800 and maintains its \u003cstrong\u003e105 mm backfocus\u003c\/strong\u003e, keeping full compatibility with Celestron T-Adapters and all dedicated imaging accessories. The \u003cstrong\u003eCNC-machined aluminum housing\u003c\/strong\u003e provides precise spacing, alignment, and centering of optical elements. All lens edges are blackened to eliminate internal reflections and maximize image contrast.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\u003cthead\u003e\u003ctr\u003e\u003cth\u003eParameter\u003c\/th\u003e\u003cth\u003eValue\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003eOptical design\u003c\/td\u003e\u003ctd\u003eReducer-flattener, 4 elements\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eReduction factor\u003c\/td\u003e\u003ctd\u003e0.7x\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eResulting focal ratio\u003c\/td\u003e\u003ctd\u003ef\/7 (from f\/10)\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eOptimal backfocus\u003c\/td\u003e\u003ctd\u003e105 mm\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eFitting\u003c\/td\u003e\u003ctd\u003e2\" — 24-thread M\/F on both sides\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eOptical coating\u003c\/td\u003e\u003ctd\u003eBroadband multilayer anti-reflection\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eOptical glass\u003c\/td\u003e\u003ctd\u003eLanthanum and rare-earth, high-refractive-index\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eExposure time reduction\u003c\/td\u003e\u003ctd\u003e50% (1 full stop gain)\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eField of view increase\u003c\/td\u003e\u003ctd\u003e43%\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eCompatibility\u003c\/td\u003e\u003ctd\u003eCelestron Edge HD 800 exclusively\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eItem code\u003c\/td\u003e\u003ctd\u003eCSCE94242\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eInstallation and Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe reducer threads directly onto the \u003cstrong\u003e2\" rear threaded port of the Edge HD 800 tube\u003c\/strong\u003e. Its large-diameter aperture reduces mechanical vignetting and makes the system compatible with \u003cstrong\u003eAPS-C sensors\u003c\/strong\u003e and off-axis guiders (OAG). A specific photographic adapter for the EdgeHD 800 is required to complete the imaging setup (not included).\u003c\/p\u003e\n\n\u003ch2\u003eCompatibility Note\u003c\/h2\u003e\n\u003cp\u003eThe Celestron 94242 reducer is designed \u003cstrong\u003eexclusively\u003c\/strong\u003e for the \u003cstrong\u003eEdge HD 800\u003c\/strong\u003e telescope. It is not optically compatible with the standard C8 or any other Schmidt-Cassegrain or Cassegrain telescope of different aperture or optical design.\u003c\/p\u003e\n\n\u003ch2\u003eWho It’s For\u003c\/h2\u003e\n\u003cp\u003eIdeal for astrophotographers using the Celestron Edge HD 800 who want a faster, brighter system with a wider field of view, without losing the flat-field correction that defines the Edge HD line. Compatible with ZWO ASI, QHY, Player One cameras and modified DSLRs.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":51261165830475,"sku":"CSCE94242","price":504.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/94242_reducer_lens_edgehd_800_03_570x380_2x_57b00cb7-a2ae-4abe-91eb-0dba007879d0.jpg?v=1744214316","url":"https:\/\/adriasky.it\/en\/products\/celestron-focal-reducer-0-7x-edge-hd-800","provider":"Adriasky","version":"1.0","type":"link"}