{"product_id":"askar-3-f-3-9-full-frame-reducer-for-fra600-fra600-red","title":"Askar 3\" f\/3.9 Full Frame Reducer for FRA600 - FRA600-RED","description":"\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/FRA600-RED_Banner.jpg?v=1744916408\" alt=\"\"\u003e\u003c\/span\u003e\u003cspan\u003eThe Askar f\/3.9 full frame 3\" reducer features a 4 element optical design specifically for the FRA600 Quad Astrograph.  It offers 0.7X focal ratio reduction in focal ratio to shorten exposure times and effectively widen the field of view. Back focus is 55 mm.  The FRA600 Reducer has built-in M48X0.75 filter threads.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ccenter\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/FUJWIIZNHhs?si=qCsBpSHVJa4LxukW\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/center\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":41810182078577,"sku":"ASK-FRA600-RED","price":395.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/FRA600_RED.jpg?v=1776458931","url":"https:\/\/khanscope.com\/en-fr\/products\/askar-3-f-3-9-full-frame-reducer-for-fra600-fra600-red","provider":"Khan Scope Centre","version":"1.0","type":"link"}