{"product_id":"sky-watcher-0-77x-reducer-flattener-for-esprit-150-s20215","title":"Sky-Watcher 0.77x Reducer\/Flattener for Esprit 150 - S20215","description":"\u003ch3 style=\"text-align: center;\"\u003eSky-Watcher 0.77x Reducer\/Flattener for Esprit 150\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSky-Watcher 0.77x Reducer\/Flattener\u003c\/li\u003e\n\u003cli\u003eOnly for the Esprit 150 Focuser\u003c\/li\u003e\n\u003cli\u003eCompatible with both APS-C and full frame sensors\u003c\/li\u003e\n\u003cli\u003e36 mm fully illuminated field is available\u003c\/li\u003e\n\u003cli\u003eAlso good to use for full frame cameras\u003c\/li\u003e\n\u003cli\u003eProvides a 90 mm back focus\u003c\/li\u003e\n\u003cli\u003eOr, 55 mm when back focus spacer and M48 ring installed\u003c\/li\u003e\n\u003cli\u003eLowers f\/ratio from native f\/7 (1050 mm) to f\/5.4 (810 mm)\u003c\/li\u003e\n\u003cli\u003eReduces exposure time by 68% compared to native f\/7\u003c\/li\u003e\n\u003cli\u003e2.54 x 1.7 degree field of view when used with a full frame camera\u003c\/li\u003e\n\u003cli\u003e1.66 x 1.11 degree field of view when used with APS-C crop sensor\u003c\/li\u003e\n\u003cli\u003eIncludes metal thread-on caps and back focus spacer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis is the Sky-Watcher 0.77x Reducer\/Flattener for their Esprit 150 ED Triplet Refractor telescope. Use this Reducer and Flattener attachment with the Esprit 150 optics to lower the f\/ratio from native f\/7 (1050 mm) to f\/5.4 (810 mm). It also reduces your imaging exposure time by 68% compared to native f\/7, by providing a brighter image.\u003c\/p\u003e\n\u003cp\u003eThis Sky-Watcher 0.77x Reducer\/Flattener for Esprit 150 provides a nominal 90 mm or a 55 mm back focal distance which is compatible with many imaging cameras. Install the included spacer to change the back focus from the 90 mm down to the 55 mm. It also includes a convenient M48 thread adapter to mount this reducer to the Esprit 150's focuser. This Reducer\/Flattener from Sky-Watcher also includes a built-in 2\" filter cell to allow the installation of 2\" filters.\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eSpecifications:\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer:\u003c\/td\u003e\n\u003ctd\u003eSky-Watcher\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\/SKU:\u003c\/td\u003e\n\u003ctd\u003eS20215\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction:\u003c\/td\u003e\n\u003ctd\u003e0.77x Reducer\/Flattener for their Esprit 150 ED Triplet Refractor telescope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReduction:\u003c\/td\u003e\n\u003ctd\u003e0.77x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus:\u003c\/td\u003e\n\u003ctd\u003e90 mm or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFOV Results:\u003c\/td\u003e\n\u003ctd\u003e2.54 x 1.7 degree field of view with a full frame camera; 1.66 x 1.11 degree field of view with APS-C crop sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor:\u003c\/td\u003e\n\u003ctd\u003eBlack - metal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sky-Watcher USA","offers":[{"title":"Default Title","offer_id":39353234751601,"sku":"SWU-S20215","price":471.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/S20215_Esprit150_RedFlat.jpg?v=1776458968","url":"https:\/\/khanscope.com\/en-fr\/products\/sky-watcher-0-77x-reducer-flattener-for-esprit-150-s20215","provider":"Khan Scope Centre","version":"1.0","type":"link"}