{"product_id":"askar-1x-flattener-for-80ed-refractor-80ed-flat","title":"Askar 1X Flattener for 80ED Refractor - 80ED-FLAT","description":"\u003ch3 style=\"text-align: center;\"\u003e1X Field Flattener for the Askar 80ED Refractor OTA\u003c\/h3\u003e\n\u003cp\u003eThis 1X Flattener is specifically designed for the Askar 80ED refractor.  Its triplet design (with one element of ED glass) is optimized for APS-C.  With this flattener installed you will achieve a flatter field and sharper, rounder stars at the edges, as it corrects for both field curvature and coma.\u003c\/p\u003e\n\u003cp\u003eThe Askar 80ED 1X Flattener does not change the native focal ratio of the 80ED OTA; it remains at f\/7.  The back focus is 55mm (standard) as measured from the M48 threaded back surface.  It weighs 0.42kg.\u003c\/p\u003e\n\u003cp\u003eThere is no need for an addition filter drawer thanks to the built-in M48 x 0.75 2\" filter thread.  In addition, the flattener integrates with the 360º camera rotator of your 80ED. The entire unit is CNC machined and comes with a threaded metal cap on both ends.\u003c\/p\u003e\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e80ED Focal length with Flattener Installed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e560mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e80ED Focal ratio with Flattener Installed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ef\/7\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNumber of Elements\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTriplet design (including one ED glass)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eAPS-C\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBack Focus\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e55mm from the base of M48 male thread\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e0.42kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eM54×0.75\u003c\/strong\u003e \u003cstrong\u003ewith M48×0.75 filter thread inside\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":42105732431985,"sku":"ASK-80ED-FLAT","price":170.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/80ED_Flat_9563e122-2ba9-488f-93ca-b51307abae0a.png?v=1776459136","url":"https:\/\/khanscope.com\/fr-fr\/products\/askar-1x-flattener-for-80ed-refractor-80ed-flat","provider":"Khan Scope Centre","version":"1.0","type":"link"}