{"product_id":"explore-scientific-3-field-flattener-7x-focal-reducer-fffr507x-00","title":"Explore Scientific 3\" Field Flattener .7x Focal Reducer (FFFR507X-00)","description":"\u003ch1\u003eExplore Scientific 3\" Field Flattener .7x Focal Reducer\u003c\/h1\u003e\n\u003cp\u003eExplore Scientific’s 3-inch Field Flattener\/0.7x Focal Reducer is a multi-faceted accessory designed to enhance your astrophotography experiences. As a field flattener, this piece addresses the edge-of-field aberrations caused by curved focal planes to ensure your night at the eyepiece will result in crisp, true images.\u003c\/p\u003e\n\u003cp\u003eAs a focal reducer, this device will reduce your f-ratio by 0.7, which results in a wider field of view, brighter images and less exposure time. Recommended for our 127mm and 152mm refracting telescopes (excluding our doublet refractors), this field flattener\/focal reducer boasts fully multi-coated optics.\u003cbr\u003e\u003cbr\u003eThis item comes with a threaded adapter that threads onto the Explore Scientific 2-inch rack-and-pinion focuser. Threaded attachment to a 2.5-hex focuser, which comes stock on our 127mm APO telescopes, requires purchase of an additional adapter. \u003c\/p\u003e\n\u003cp\u003eThe field flattener\/focal reducer offers 55 mm of back focus from the rear face of the device. The M42x0.75 adapter adds 3 mm, so the sensor needs to be 52 mm from the face of the adapter.\u003cbr\u003e\u003cbr\u003eTo connect to the 2.5 hex focuser, purchase item number 510366.\u003c\/p\u003e\n\u003cp\u003eWhile technically this was designed for the f\/8 system, through user experiences and our subsequent testing we have concluded that our 3-inch field flattener\/reducer performs very well with our f\/7.5 refractors.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eItem Number\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003eFFFR507X-00\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eWeight\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003e1.4lb; .64kg\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eDiameter\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003e78.3mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eHeight\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"speccell\"\u003e90.1mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\u003cspan class=\"speccell\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3 class=\"spanrow\"\u003e\u003cspan class=\"speccell\"\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"speccell\"\u003eExplore Scientific 3\" Field Flattener .7x Focal Reducer\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"speccell\"\u003eWarranty\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"speccell\"\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/explore-scientific-warranty\"\u003eExplore Scientific 1-Year Warranty (You need to register)\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":46412944015589,"sku":"ES-FFFR507X-00","price":560.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/f1_1200x_869x869_9c27d97f-5d10-42ca-abc1-673a25bb1572.webp?v=1735402306","url":"https:\/\/istronomyplus.com\/products\/explore-scientific-3-field-flattener-7x-focal-reducer-fffr507x-00","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}