{"product_id":"takahashi-mewlon-focal-reducer-flattener","title":"Takahashi Mewlon Focal Reducer\/Flattener (M-FLRD)","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe M-FLRD is Takahashi's combined reducer, flattener, and corrector for the Mewlon Dall-Kirkham Cassegrain line. On the Mewlon-180C it brings the native 2160mm f\/12.0 down to 1760mm f\/9.8; on the Mewlon-210 it brings 2415mm f\/11.5 down to 1961mm f\/9.3, in both cases correcting the field to a 30mm image circle at the same time.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you own a Mewlon-180C or Mewlon-210 and want a faster, flatter field for imaging rather than the native long-focal-length Cassegrain configuration typically used for planetary and lunar visual work.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree functions in one unit:\u003c\/strong\u003e reduces the focal ratio, flattens the field, and corrects residual aberration for the Mewlon Cassegrain design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMewlon-180C:\u003c\/strong\u003e 2160mm f\/12.0 native becomes 1760mm f\/9.8.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMewlon-210:\u003c\/strong\u003e 2415mm f\/11.5 native becomes 1961mm f\/9.3.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30mm corrected image circle\u003c\/strong\u003e on both telescopes, with a matched 56.2mm back focus.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Mewlon's Dall-Kirkham Cassegrain design is optimized natively for long-focal-length planetary and lunar work; the M-FLRD trades some of that reach for a faster, corrected field better suited to deep-sky imaging on both the 180C and 210. Because it is a shared design across both apertures, the resulting f-ratio differs slightly between them — f\/9.8 on the 180C and f\/9.3 on the 210 — while the 30mm image circle and 56.2mm back focus hold constant.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eDeep-sky imaging on a Mewlon-180C or Mewlon-210 where a faster, flatter field is preferred over the native long-focus Cassegrain configuration; galaxy and planetary nebula framing at a more forgiving focal ratio.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTakahashi publishes this reducer\/flattener for two Mewlon models.\u003c\/p\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope\u003c\/th\u003e\n\u003cth\u003eNative\u003c\/th\u003e\n\u003cth\u003eWith M-FLRD\u003c\/th\u003e\n\u003cth\u003eImage circle\u003c\/th\u003e\n\u003cth\u003eBack focus\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMewlon-180C\u003c\/td\u003e\n\u003ctd\u003e2160mm f\/12.0\u003c\/td\u003e\n\u003ctd\u003e1760mm f\/9.8\u003c\/td\u003e\n\u003ctd\u003eΦ30mm\u003c\/td\u003e\n\u003ctd\u003e56.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMewlon-210\u003c\/td\u003e\n\u003ctd\u003e2415mm f\/11.5\u003c\/td\u003e\n\u003ctd\u003e1961mm f\/9.3\u003c\/td\u003e\n\u003ctd\u003eΦ30mm\u003c\/td\u003e\n\u003ctd\u003e56.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eFor spacing this reducer correctly with your camera, see the \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNot for Mewlon-250CRS or Mewlon-300CRS:\u003c\/strong\u003e those larger Mewlon CRS telescopes use the separate Reducer-CR and Extender-CR line rather than the M-FLRD.\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 to the Mewlon's rear cell in place of the standard visual back, with the 56.2mm back focus fixed by the unit rather than something to measure out separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDeep-sky imaging on the Mewlon-180C or Mewlon-210 at a faster, corrected focal ratio.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the same part work on both the Mewlon-180C and Mewlon-210?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes — it is a shared design, with a slightly different resulting f-ratio on each telescope.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it work on the Mewlon-250CRS or 300CRS?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — those models use the separate Reducer-CR\/Extender-CR line. If you are unsure which corrector matches your Mewlon, send us the model and we will confirm it.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe M-FLRD is the matched reducer, flattener, and corrector for the Mewlon-180C and Mewlon-210, trading some of the Mewlon's native reach for a faster, flatter 30mm image circle suited to deep-sky imaging.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047117475951,"sku":"TAK-TKA70581","price":556.27,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tmc1800_2_6.jpg?v=1786914202","url":"https:\/\/ontariotelescope.com\/products\/takahashi-mewlon-focal-reducer-flattener","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}