{"product_id":"svbony-sv209-1-0x-field-flattener-for-sv550-80-f6-w9161a","title":"SVBONY SV209 1.0x Field Flattener for SV550 80 F6 | W9161A","description":"\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/6386046309432048874784895.jpg?v=1769639211\"\u003e\u003c\/p\u003e\n\u003ch3\u003eThe Calculation Method of 55mm Back Intercept\u003c\/h3\u003e\n\u003cp\u003eFirst unscrew the 2-inch adapter ring of the SV550 80mm APO, and then connect the three parts of the field flattener. The installation sequence of the three parts is shown in the figure above(don't confuse the order) . Then connect the mount (not included) and camera compatible with Canon to shoot.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/6386046311434876192638703.jpg?v=1769639212\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSV550 80 OTA Field Flattener\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eMost astronomical telescopes have a certain field curvature problem, which can be improved with SV209. The SV209 is a special field flattener for SV550 80F6 OTA, which can effectively improve the field curvature of fringe field images. Great for astrophotography.\u003c\/p\u003e\n\u003ch3\u003eM63 Extension Tube\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eEquipped with M63 extension tube and M48 adapter ring to ensure that the back focal length of the field flattener is 55mm in astronomical tradition.\u003c\/p\u003e\n\u003cp\u003eThread size: M63x1 male thread\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/6386046313975796124363680.jpg?v=1769639211\"\u003e\u003c\/p\u003e\n\u003ch3\u003eM48 Adapter Ring\u003c\/h3\u003e\n\u003cp\u003eBuilt-in 2-inch filter mounting threads support 2-inch filter mounting.\u003c\/p\u003e\n\u003cp\u003eBy connecting the adapter ring, you can match any 2-inch filter you need to meet your different shooting needs.\u003c\/p\u003e\n\u003ch3\u003eConnectable CAA Field Conditioner\u003c\/h3\u003e\n\u003cp\u003eSV209 can be installed to create flat images. At the same time, it can be installed in combination with the SV210 (sold separately) to adjust the field of view of the image.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/6386046315254080184411718.jpg?v=1769639212\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSVBONY\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSV209\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eAdditional Thread\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eM63x1 female thread for photo adaptions\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eConnection at Telescope Side\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eM63x1 male thread\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eConnection 1 at Camera Side\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eM63x1 thread female - working distance 103 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eConnection 2 at Camera Side\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eM48x0.75 male thread - working distance 55 mm or 91.5 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFully Illuminated Field\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e45 mm（Support Full Frame Sensors）\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eNumber of Elements\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 lenses\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFactor\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.0 - no change of focal length to the focal plane\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCoating\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFMC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eDiameter of the Housing\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e67mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eLength\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e87.5 mm without the male thread\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":48714602971388,"sku":"W9161A","price":204.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/w9161a-2_20250806165726_0208.jpg?v=1769639247","url":"https:\/\/all-startelescope.com\/fr\/products\/svbony-sv209-1-0x-field-flattener-for-sv550-80-f6-w9161a","provider":"All-Star Telescope Canada","version":"1.0","type":"link"}