{"product_id":"certified-pre-owned-explore-scientific-3-field-flattener-7x-focal-reducer-cpo-fffr507x-00","title":"Certified Pre-Owned Explore Scientific 3\" Field Flattener .7x Focal Reducer - CPO-FFFR507X-00","description":"\u003cp\u003e\u003cstrong\u003eCertified Pre-Owned Refurbished \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese Certified Pre-Owned items -- including telescopes and accessories -- have been thoroughly inspected by the Explore Scientific Quality Control Team to ensure the item meets our high standard. The item is then repacked, often in a new box, and prepared for shipment.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGenerally these items come from one of t\u003c\/span\u003e\u003cspan\u003ehree \u003c\/span\u003e\u003cspan\u003esources: returned, often in like new condition; traded in on another item; or new but has blemishes and marks.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eCertified Pre-Owned items carry the standard Limited One-Year Warranty on mechanical and optical systems; however, because these items are pre-owned, they DO NOT carry a cosmetic warranty.\u003c\/p\u003e\n\u003c!--start tab--\u003e\n\u003ch1 id=\"description\"\u003eDescription\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\u003c!--end tab--\u003e\u003c!--start tab--\u003e\n\u003ch1 id=\"specs\"\u003eSpecs\u003c\/h1\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eItem Number\u003c\/span\u003e CPO-\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 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 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 class=\"speccell\"\u003e90.1mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c!--end tab--\u003e\n\u003cp style=\"font-size: 16px;\"\u003eCA Residents: \u003cstrong\u003e\u003ca href=\"https:\/\/explorescientificusa.com\/pages\/prop65\" target=\"_blank\"\u003eProp 65 WARNING(S)\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":45643726520561,"sku":"CPO-FFFR507X-00","price":380.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/5711\/6312\/files\/f1_1200x_888c1efa-ce1b-4b50-88b1-51433afa7126.jpg?v=1730372483","url":"https:\/\/villohome.com\/products\/certified-pre-owned-explore-scientific-3-field-flattener-7x-focal-reducer-cpo-fffr507x-00","provider":"Villohome","version":"1.0","type":"link"}