{"product_id":"starfield-coma-corrector-for-f-3-f-6-newtonians-sf-cm-01","title":"StarField Coma Corrector for f\/3 - f\/6 Newtonians - SF-CM-01","description":"\u003cp\u003eNewtonians inherit an optical distortion called Coma, where stars at the corners appear not round, but in more of a tadpole shape. The Starfield 2\" Coma Corrector will provide a flat field image when used with a Newtonian telescope with a focal ratio of f\/3 to f\/6. The large 2\" corrector will provide a wide field of illumination for even full frame DSLR's without vignetting.\u003c\/p\u003e\n\u003cp\u003eThe Starfield Coma Corrector is not just for imaging; it will significantly enhance your visual experience as well, providing a coma-free view with sharp, pinpoint stars. The 2\" nosepiece features a recessed safety groove and is threaded to accept standard 2\" filters.\u003c\/p\u003e\n\u003cstrong\u003eFeatures\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e2\" eyepiece barrel with brass compression ring and two large thumbscrews\u003c\/li\u003e\n\u003cli\u003eMagnification factor of only 1.1x\u003c\/li\u003e\n\u003cli\u003eFully Multicoated optics\u003c\/li\u003e\n\u003cli\u003eA 3-piece modular design includes optics in 2\" nosepiece with 48mm male filter thread, a 2\" eyepiece barrel (20mm) that attaches to the optical nosepiece, and an M48 - T2 adapter ring\u003c\/li\u003e\n\u003cli\u003eBackfocus spacing requirement is approximately 70mm +\/- 5mm from the shoulder of the 2\" nosepiece to the image plane\u003c\/li\u003e\n\u003cli\u003eFor visual use, connect the 2\" eyepiece barrel to the main optical nosepiece\u003c\/li\u003e\n\u003cli\u003eFor photo use, unscrew the 2\" eyepiece barrel and attach the included M48-T2 ring to the main optical nosepiece, then attach your DSLR camera to the male T2 thread via a camera-specific T-ring (not included)\u003c\/li\u003e\n\u003cli\u003eWeight: 7.7 oz\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"StarField Optics","offers":[{"title":"Default Title","offer_id":39768748687473,"sku":"SFO-SF-CM-01","price":103.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/2_inch_Coma_Corrector.jpg?v=1776459233","url":"https:\/\/khanscope.com\/en-fr\/products\/starfield-coma-corrector-for-f-3-f-6-newtonians-sf-cm-01","provider":"Khan Scope Centre","version":"1.0","type":"link"}