{"product_id":"takahashi-multi-reducer-0-85x-l-long","title":"Takahashi Multi-Reducer 0.85x-L for FC-76 \/ FC-60 \/ FC-65 Series","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe L version of Takahashi's 0.85x Multi-Reducer, matched to the \u003cstrong\u003eFC-76 series and the FC-60 and FC-65\u003c\/strong\u003e: specifically the FC-76DCU, FC-76DS, FC-76DP, FC-76DC, FC-60, FC-65 and FC-76. On an FC-76D it gives \u003cstrong\u003e486 mm at f\/6.4\u003c\/strong\u003e, with a Ø44 mm image circle that covers a full-frame sensor.\u003c\/p\u003e\u003cp\u003eThe Multi-Reducer comes in three versions, and the letter is not a size preference — it identifies which telescope family the reducer is computed for. L is the FC-76 and FC-60\/65 series; S is the FS-60 series; M is the FCT-65D and FC-50.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you image with an FC-76-series tube, or with an FC-60 or FC-65, and want the reducer Takahashi computed for it.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e486 mm at f\/6.4 on the FC-76D:\u003c\/strong\u003e the headline configuration for this version.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eØ44 mm image circle:\u003c\/strong\u003e covers a full-frame sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeven compatible tubes:\u003c\/strong\u003e the widest coverage of the three versions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour elements in three groups:\u003c\/strong\u003e reduces and flattens together.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eM55.9 (P=0.75) telescope side, M52 (P=0.75) camera side.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eØ60 × 54.3 mm, approx. 210 g.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA 0.85x reduction takes 15% off the focal length and speeds the focal ratio to match — modest next to a 0.6x or 0.7x reducer, and one that keeps image scale usable rather than collapsing it. The four-element, three-group design is what holds the Ø44 mm circle: it corrects field curvature across a full-frame sensor while reducing, which a simpler design would not manage at this speed.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eWide-field deep-sky imaging on an FC-76, FC-65 or FC-60: large nebulae, star fields, and framing that benefits from the extra field and shorter exposures.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope\u003c\/th\u003e\n\u003cth\u003eFocal length with reducer\u003c\/th\u003e\n\u003cth\u003eFocal ratio\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFC-76D series\u003c\/td\u003e\n\u003ctd\u003e486mm\u003c\/td\u003e\n\u003ctd\u003ef\/6.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFC-76\u003c\/td\u003e\n\u003ctd\u003e510mm\u003c\/td\u003e\n\u003ctd\u003ef\/6.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFC-65\u003c\/td\u003e\n\u003ctd\u003e425mm\u003c\/td\u003e\n\u003ctd\u003ef\/6.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFC-60\u003c\/td\u003e\n\u003ctd\u003e425mm\u003c\/td\u003e\n\u003ctd\u003ef\/7.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eThreads are M55.9 (P=0.75) on the telescope side and M52 (P=0.75) on the camera side. Note that the FC-76DP also has a dedicated \u003cstrong\u003e76DP FU Reducer 0.64x\u003c\/strong\u003e, which is a stronger corrector than this one — we stock it if you want the shorter focal length.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eThe letter identifies the telescope, not the length:\u003c\/strong\u003e S, M and L all reduce by 0.85x. Ordering by telescope model is the way to get the right one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eA stronger option exists for the FC-76DP:\u003c\/strong\u003e the 0.64x FU reducer. This 0.85x is the gentler reduction across the wider family.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAn imaging corrector:\u003c\/strong\u003e designed for a camera at the focal plane rather than an eyepiece.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — it threads into the train on M55.9 at the telescope and M52 at the camera.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat will my FC-76D become?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e486 mm at f\/6.4.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it cover a full-frame camera?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes — Ø44 mm image circle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich telescopes does it fit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe FC-76DCU, FC-76DS, FC-76DP, FC-76DC, FC-60, FC-65 and FC-76.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe FC-76 version of Takahashi's 0.85x Multi-Reducer — 486 mm at f\/6.4 on an FC-76D, over a full-frame field.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54086045565039,"sku":"TAK-TKA00580L","price":676.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tka00580l.jpg?v=1787328953","url":"https:\/\/ontariotelescope.com\/products\/takahashi-multi-reducer-0-85x-l-long","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}