{"product_id":"takahashi-toa-150-tsa-120-0-7x-toa-35-reducer-and-camera-ring","title":"Takahashi TOA-150 \/ TSA-120 0.7x TOA-35 Reducer and Camera Ring","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-35 Reducer 150 Set pairs Takahashi's 0.7x TOA-35 reducer with a CA Ring 150 sized for the TOA-150B and TSA-120\/TSA-102, cutting these telescopes to a materially faster focal ratio while holding a flat Φ44mm image circle. The reducer is the same 4-element, 3-group ED glass optic used across the whole TOA-35 line — this kit's CA Ring 150 is what makes it fit the TOA-150 and TSA-120 mounts specifically, and it's the reason a camera ring is called out explicitly in this listing's title.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis kit suits TOA-150B and TSA-120 (and TSA-102) owners who want a faster imaging focal ratio without leaving the ED apochromat optics those telescopes are built around. On the TOA-150B it lands at f\/5.2; on the TSA-120 at f\/5.3 — both a substantial step down from their native focal ratios.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 elements in 3 groups, ED glass:\u003c\/strong\u003e the same optical design used across every TOA-35 reducer kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.7x reduction:\u003c\/strong\u003e cuts focal length on each compatible telescope to roughly 0.7x native.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eΦ44mm corrected image circle:\u003c\/strong\u003e flat, sharp field across the reduced focal length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBundled CA Ring 150 (\"camera ring\"):\u003c\/strong\u003e sized for the TOA-150B and TSA-120\/TSA-102 mounts, installed as a matched system rather than sourced separately.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe reducer threads to the included CA Ring 150. Back focus is 62.5mm on both the TOA-150B and the TSA-120. See the \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e for the full spacing chain.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eFaster deep-sky imaging on the TOA-150B or TSA-120 where exposure time matters — nebulae, galaxies, and clusters that benefit from the reduced focal ratio; general astrophotography where a shorter focal length better frames larger targets.\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\u003eResulting focal length\u003c\/th\u003e\n\u003cth\u003eResulting focal ratio\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\u003eTOA-150B (this kit)\u003c\/td\u003e\n\u003ctd\u003e775mm\u003c\/td\u003e\n\u003ctd\u003ef\/5.2\u003c\/td\u003e\n\u003ctd\u003eΦ44mm\u003c\/td\u003e\n\u003ctd\u003e62.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTSA-120 (this kit)\u003c\/td\u003e\n\u003ctd\u003e635mm\u003c\/td\u003e\n\u003ctd\u003ef\/5.3\u003c\/td\u003e\n\u003ctd\u003eΦ44mm\u003c\/td\u003e\n\u003ctd\u003e62.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTOA-130NS \/ TOA-130NFB\u003c\/td\u003e\n\u003ctd\u003e698mm\u003c\/td\u003e\n\u003ctd\u003ef\/5.4\u003c\/td\u003e\n\u003ctd\u003eΦ44mm\u003c\/td\u003e\n\u003ctd\u003e65.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eThis is the same 0.7x reducer optic used on the TOA-130, but bundled here with the larger CA Ring 150 for the TOA-150 and TSA-120\/TSA-102 mounts. TOA-130NS\/NFB owners use the sibling kit, the \u003cstrong\u003eTOA-35 0.7x Reducer for TOA-130\u003c\/strong\u003e, which bundles the identical reducer with CA Ring 130 instead — the two kits are not interchangeable between telescopes even though the optic inside them is the same.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSold as a matched kit:\u003c\/strong\u003e the CA Ring 150 (the \"camera ring\" in this listing's title) is bundled with the reducer, so there's nothing separate to source for a TOA-150B or TSA-120.\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 — the reducer threads to the included CA Ring 150, sized to install directly on either telescope's mount.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDeep-sky astrophotography on the TOA-150B or TSA-120 at a faster focal ratio than either telescope's native configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this the same reducer as the TOA-130 kit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe optic is identical. What differs is the bundled ring — this kit ships with CA Ring 150 for the TOA-150\/TSA-120; the TOA-130 kit ships with CA Ring 130 instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat else do I need with it?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYour camera's own T-ring or adapter to complete the connection at the 62.5mm back focus figure.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA matched TOA-35 reducer kit for the TOA-150B and TSA-120\/TSA-102, with the CA Ring 150 camera ring included, delivering a flat Φ44mm image circle at f\/5.2-5.3.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047113674863,"sku":"TAK-TKA32580NS","price":1515.8,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TKA32580_1.jpg?v=1786914118","url":"https:\/\/ontariotelescope.com\/products\/takahashi-toa-150-tsa-120-0-7x-toa-35-reducer-and-camera-ring","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}