{"product_id":"takahashi-toa-130-25mm-spacer-ring-for-67-flattener","title":"Takahashi TOA-130 25mm Spacer Ring for 67 Flattener","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis 25 mm ring — Takahashi's \"Ring #82\" — is the TOA-130NFB-specific output adapter for the 67FL Flattener system. The 67FL Flattener corrects a 90 mm image circle at an optimal 106.2 mm back focus, and this ring is what sets that spacing correctly on the TOA-130NFB.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is what you need if you own a TOA-130NFB and are fitting the 67FL Flattener for large-format imaging. It is a spacing part, not a standalone corrector.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 mm output length:\u003c\/strong\u003e the figure published for the TOA-130NFB fitting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM92 x 1.0 interface:\u003c\/strong\u003e matches the 67FL Flattener's own thread family.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescope-specific:\u003c\/strong\u003e the TOA-150 uses a different ring in the same system, at 17 mm output.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eLarge-format imaging on the TOA-130NFB\u003c\/strong\u003e with the 67FL Flattener, covering the system's 90 mm corrected circle.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe 67FL Flattener kit uses different output rings depending on the host telescope: 25 mm for the TOA-130NFB (this ring, TKA31584) and 17 mm for the TOA-150 (TKA26583). Confirm which telescope you're fitting before ordering — the rings are not interchangeable between the two. Full spacing figures are in 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\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIt does not work alone.\u003c\/strong\u003e This ring only sets spacing for the 67FL Flattener on the TOA-130NFB — the flattener itself is a separate purchase.\u003c\/li\u003e\n\u003c\/ul\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 onto the 67FL Flattener at the published M92 x 1.0 interface and sets the 25 mm spacing without adjustment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this fit my TOA-150?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — the TOA-150 uses its own 17 mm ring (TKA26583) in the same 67FL Flattener system. This 25 mm ring is specific to the TOA-130NFB.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need the 67FL Flattener as well?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes — this ring only sets the spacing; the flattener carries the optics.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: the 25 mm output ring that fits the 67FL Flattener to the TOA-130NFB at the M92 x 1.0 interface, setting up the system's 90 mm corrected image circle.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047108071535,"sku":"TAK-TKA31584","price":127.27,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TKA31584_1.jpg?v=1786913882","url":"https:\/\/ontariotelescope.com\/products\/takahashi-toa-130-25mm-spacer-ring-for-67-flattener","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}