{"title":"Takahashi TOA","description":"\u003cp\u003eThe Takahashi TOA line, listed by aperture. Part of \u003ca href=\"\/collections\/takahashi-telescopes\"\u003eTakahashi Telescopes\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"takahashi-toa-130ns-130mm-f-7-7-triplet-refractor-ota-with-mef-2-7-focuser","title":"Takahashi TOA-130NS 130mm f\/7.7 Triplet Refractor OTA with MEF-2.7 Focuser","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-130NS is Takahashi's 130 mm ED apochromatic triplet, built around a highly air-spaced three-element objective for the highest order of color correction Takahashi offers at this aperture. The native focal length is 1000 mm at f\/7.7, and the tube ships with the Micro Edge Focuser MEF-2.7, a dual-speed 2.7-inch rack-and-pinion unit sized for the load of a full imaging or visual accessory train. Published catalog weight is 9.9 kg, and the tube extends from 1013 mm to 1144 mm as the drawtube travels.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you want serious resolving power in a refractor — 130 mm of ED apochromatic aperture at f\/7.7 handles detailed planetary and lunar work and tight deep-sky framing, and the MEF-2.7 focuser is built to carry heavier imaging accessories without flexing. It suits an observer or imager stepping up from a smaller apochromat who has a mount rated well above the 9.9 kg tube weight once accessories are attached.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHighly air-spaced ED triplet, 3 elements in 3 groups:\u003c\/strong\u003e two S-FPL53 ED elements deliver Takahashi's highest published order of color correction at this aperture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1000 mm focal length at f\/7.7:\u003c\/strong\u003e strong native resolving power for planetary, lunar and tight deep-sky targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicro Edge Focuser MEF-2.7 included:\u003c\/strong\u003e a dual-speed 2.7-inch rack-and-pinion focuser built for heavier imaging trains.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e222.5 mm back focus at prime focus:\u003c\/strong\u003e published by Takahashi for the native configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable dew shield:\u003c\/strong\u003e tube length runs from 1013 mm to 1144 mm as it extends.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnife-edged internal baffles:\u003c\/strong\u003e reduce internal reflections and improve contrast.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-130NS objective is a highly air-spaced triplet using two S-FPL53 ED elements, a configuration Takahashi builds specifically to push color correction beyond what a standard doublet or single-ED triplet achieves. At f\/7.7 and 1000 mm focal length, it favors resolving power and reach over imaging speed, and the hard multicoated optics and knife-edged baffles are aimed at high-contrast planetary and lunar views as much as deep-sky imaging. The design accepts a family of Takahashi correctors: the TOA-35FL field corrector holds close to the native focal length at 980 mm, f\/7.5, with a 40 mm image circle and 117.5 mm back focus; the TOA-645FL flattener runs 990 mm at f\/7.6 with a larger 60 mm image circle and 56.2 mm back focus for medium-format sensors; and the TOA-35RD 0.7x reducer drops the system to 698 mm at f\/5.4 with a 44 mm image circle and 65.5 mm back focus for wider-field imaging.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eHigh-resolution visual observation of planets, the Moon and double stars; tight-framing deep-sky and planetary astrophotography; medium-format imaging once paired with the TOA-645FL flattener; observatory or serious amateur setups on a mount rated well above the 9.9 kg tube weight.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eAt prime focus, back focus runs 222.5 mm. Adding the TOA-35FL corrector changes that to 117.5 mm at f\/7.5; the TOA-645FL flattener changes it to 56.2 mm at f\/7.6 with a 60 mm image circle for medium-format cameras; and the TOA-35RD reducer changes it to 65.5 mm at f\/5.4. Each accessory resets both the focal ratio and the spacing your imaging train needs to hit, and the \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e lists all three configurations in full — send us your camera and filter setup and we will confirm the fit with you. Note that the closely related TOA-130NFB carries a different published weight (11.7 kg) and a different back focus (274.5 mm) due to its larger MEF-4 focuser; the two are separate products, not variants of one another.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eMount, tripod, and finder are sold separately:\u003c\/strong\u003e this listing is the optical tube assembly with the MEF-2.7 focuser attached.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eImaging performance depends on the matched corrector:\u003c\/strong\u003e the bare optical tube favors visual use and longer-focal-length imaging; the TOA-35FL, TOA-645FL, or TOA-35RD is what flattens the field for most deep-sky imaging trains.\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 is a fixed-mirror-free refractor with nothing to collimate in normal use. The MEF-2.7 focuser is a standard dual-speed rack-and-pinion unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHigh-resolution planetary and lunar visual observation, tight deep-sky framing, and imaging once paired with a TOA-series corrector.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it need extra accessories for imaging?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFor a flat field, yes — the TOA-35FL, TOA-645FL, or TOA-35RD, matched to the back focus your camera train needs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat mounts is it suited to?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA mount rated comfortably above the 9.9 kg published tube weight once a full imaging or visual accessory load is added.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is this different from the TOA-130NFB?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBoth share the same 130 mm optical design, but the NFB ships with the larger MEF-4 focuser, weighs more at 11.7 kg, and has a longer 274.5 mm back focus — the two are separate products, not interchangeable configurations of one tube.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a 130 mm f\/7.7 ED apochromatic triplet with the dual-speed MEF-2.7 focuser included, built for high-resolution visual work and flat-field imaging once paired with a TOA-series corrector.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047051350127,"sku":"TAK-TOK13010","price":8460.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TOK13010_TOA-130NS_OTA_1.jpg?v=1786911747"},{"product_id":"takahashi-toa-130nfb-130mm-f-7-7-triplet-refractor-ota-with-mef-4-focuser","title":"Takahashi TOA-130NFB 130mm f\/7.7 Triplet Refractor OTA with MEF-4 Focuser","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-130NFB shares its 130 mm ED apochromatic triplet objective with the TOA-130NS, but ships with Takahashi's larger Micro Edge Focuser MEF-4 — a 4-inch dual-speed rack-and-pinion unit with a built-in camera angle adjuster, sized for medium-format imaging trains. The native focal length is 1000 mm at f\/7.7, published weight is 11.7 kg, and the back focus at prime focus runs 274.5 mm, noticeably longer than the NS variant's 222.5 mm because of the larger focuser body.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you are building a medium-format or heavier imaging train and want the longer back focus and larger focuser throat the MEF-4 provides — the built-in camera angle adjuster is aimed at photographers who need to rotate a bulkier camera body without disturbing the tube rings. At 11.7 kg published weight, it asks for a mount with real payload margin once accessories are attached.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHighly air-spaced ED triplet, 3 elements in 3 groups:\u003c\/strong\u003e two S-FPL53 ED elements deliver Takahashi's highest published order of color correction at this aperture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1000 mm focal length at f\/7.7:\u003c\/strong\u003e strong native resolving power for planetary, lunar and tight deep-sky targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicro Edge Focuser MEF-4 included:\u003c\/strong\u003e a 4-inch dual-speed rack-and-pinion focuser with a built-in camera angle adjuster for medium-format photography.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e274.5 mm back focus at prime focus:\u003c\/strong\u003e published by Takahashi, noticeably longer than the TOA-130NS's 222.5 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable dew shield:\u003c\/strong\u003e tube length runs from 1022 mm to 1153 mm as it extends.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnife-edged internal baffles:\u003c\/strong\u003e reduce internal reflections and improve contrast.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-130NFB uses the same highly air-spaced triplet objective as the TOA-130NS — two S-FPL53 ED elements for Takahashi's highest published order of color correction at this aperture — paired with the larger MEF-4 focuser instead of the MEF-2.7. That focuser change is what shifts the back focus from 222.5 mm to 274.5 mm and adds roughly 1.8 kg to the published tube weight. At f\/7.7 and 1000 mm focal length, the optical performance is identical to the NS variant; the difference is entirely in what the focuser and its camera angle adjuster support downstream. The design accepts the same TOA-series correctors as the NS: the TOA-35FL field corrector runs 980 mm at f\/7.5 with a 40 mm image circle, and the 67FL corrector holds the full 1000 mm focal length at f\/7.7 with a substantially larger 92 mm image circle for medium-format sensors.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eMedium-format and full-frame deep-sky astrophotography where the larger image circle and camera angle adjuster matter; high-resolution planetary and lunar visual observation; observatory setups on a mount rated well above the 11.7 kg tube weight.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eAt prime focus, back focus runs 274.5 mm — longer than most Takahashi refractors, which is worth checking against your existing adapter stack before ordering. Adding the TOA-35FL corrector changes that to a 40 mm image circle at 980 mm and f\/7.5, while the 67FL corrector opens the image circle to 92 mm at the native 1000 mm focal length and f\/7.7 for medium-format cameras. The \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e lists these figures in full, and we're glad to confirm a specific camera and filter setup against them before you order. Note that the closely related TOA-130NS carries a different published weight (9.9 kg) and a shorter back focus (222.5 mm) due to its smaller MEF-2.7 focuser; the two are separate products, not variants of one another.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eMount, tripod, and finder are sold separately:\u003c\/strong\u003e this listing is the optical tube assembly with the MEF-4 focuser attached.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe longer back focus changes your adapter stack:\u003c\/strong\u003e at 274.5 mm, this tube needs more spacing than most Takahashi refractors reach natively — worth confirming against your camera train before ordering.\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 is a fixed-mirror-free refractor with nothing to collimate in normal use. The MEF-4 focuser's camera angle adjuster is a built-in mechanical rotator, not a separate accessory to fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMedium-format and full-frame astrophotography, plus high-resolution planetary and lunar visual observation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it need extra accessories for imaging?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFor a flat field, yes — the TOA-35FL or 67FL corrector, matched to the image circle and back focus your camera needs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat mounts is it suited to?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA mount rated comfortably above the 11.7 kg published tube weight once a full imaging accessory load is added.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is this different from the TOA-130NS?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBoth share the same 130 mm optical design, but the NS ships with the smaller MEF-2.7 focuser, weighs less at 9.9 kg, and has a shorter 222.5 mm back focus — the two are separate products, not interchangeable configurations of one tube.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: the same 130 mm f\/7.7 ED apochromatic triplet as the TOA-130NS, built around the larger MEF-4 focuser for a longer back focus and medium-format imaging support.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047051645039,"sku":"TAK-TOK13210","price":9532.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TOK13210_TOA-130NFB_OTA_1.jpg?v=1786911795"},{"product_id":"takahashi-toa-150b-150mm-f-7-3-triplet-apochromatic-refractor-ota","title":"Takahashi TOA-150B 150mm f\/7.3 Triplet Apochromatic Refractor OTA","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-150B is the largest refractor in Takahashi's TOA line, a 150 mm highly air-spaced ED apochromatic triplet built for a native 1100 mm focal length at f\/7.3. Two S-FPL53 ED elements deliver Takahashi's highest published order of color correction, and the published tube weight is 14.5 kg — a figure that puts real demands on the mount underneath it once accessories are attached. The dew shield retracts the tube from 1270 mm down to 1110 mm for storage, and the 4-inch dual-speed rack-and-pinion focuser with camera angle adjuster ships as part of the assembly.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you want the largest aperture Takahashi's TOA refractor line offers and have a mount and pier rated well above the 14.5 kg tube weight — an observatory pier or a large German equatorial mount rather than a portable setup. It suits an observer or imager who has already worked with a smaller apochromat and is stepping up specifically for the resolving power and light grasp a 150 mm aperture provides.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHighly air-spaced ED triplet, 3 elements in 3 groups:\u003c\/strong\u003e two S-FPL53 ED elements deliver Takahashi's highest published order of color correction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1100 mm focal length at f\/7.3:\u003c\/strong\u003e the longest native focal length and largest aperture in the TOA refractor line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch dual-speed rack-and-pinion focuser with camera angle adjuster included:\u003c\/strong\u003e built for the load of a full medium-format or heavy imaging train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e275 mm back focus at prime focus:\u003c\/strong\u003e published by Takahashi for the native configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable dew shield:\u003c\/strong\u003e tube length runs from 1110 mm to 1270 mm as it extends.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnife-edged internal baffles:\u003c\/strong\u003e reduce internal reflections and improve contrast at this aperture.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-150B objective is a highly air-spaced triplet using two S-FPL53 ED elements, the same design family as the TOA-130 series scaled up to a 150 mm aperture and a longer 1100 mm focal length. At f\/7.3, the design favors resolving power and light grasp — the largest of any TOA refractor — over imaging speed, with hard multicoated optics and knife-edged baffles built for high-contrast planetary and lunar work as much as deep-sky imaging. It accepts the same TOA-series correctors as the smaller TOA-130 models: the TOA-35FL field corrector runs 1080 mm at f\/7.2 with a 40 mm image circle and 117.5 mm back focus, the TOA-645FL flattener runs 1085 mm at f\/7.2 with a 60 mm image circle and 56.2 mm back focus for medium-format sensors, and the TOA-35RD 0.7x reducer drops the system to 775 mm at f\/5.2 with a 44 mm image circle and 62.5 mm back focus.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eHigh-resolution visual observation of planets, the Moon and double stars at the largest aperture Takahashi's refractor line offers; tight-framing deep-sky and planetary astrophotography; medium-format imaging with the TOA-645FL flattener; observatory installations on a pier or mount rated well above the 14.5 kg tube weight.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eAt prime focus, back focus runs 275 mm. Adding the TOA-35FL corrector changes that to 117.5 mm at f\/7.2; the TOA-645FL flattener changes it to 56.2 mm at f\/7.2 with a 60 mm image circle for medium-format cameras; and the TOA-35RD reducer changes it to 62.5 mm at f\/5.2. Each accessory resets both the focal ratio and the spacing your imaging train needs to hit, and the \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e lists all three configurations — send us your camera and filter setup and we will confirm the fit with you. Takahashi's own listing notes the tube ships with a CAA (camera angle adjuster), 31.7 mm and 50.8 mm couplings and adapters, and an extension tube included with the optical tube assembly.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eMount, tripod, and finder are sold separately from the pier or GEM you'll need:\u003c\/strong\u003e at 14.5 kg published weight, this tube asks for a mount and pier with real payload margin, not a portable travel setup.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eImaging performance depends on the matched corrector:\u003c\/strong\u003e the bare optical tube favors visual use and longer-focal-length imaging; the TOA-35FL, TOA-645FL, or TOA-35RD is what flattens the field for most deep-sky imaging trains.\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 is a fixed-mirror-free refractor with nothing to collimate in normal use, though its size and weight mean handling and mounting it takes more care than a smaller apochromat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHigh-resolution planetary and lunar visual observation and tight-framing deep-sky astrophotography, both benefiting from the largest aperture in Takahashi's TOA line.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it need extra accessories for imaging?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFor a flat field, yes — the TOA-35FL, TOA-645FL, or TOA-35RD, matched to the back focus your camera train needs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat mounts is it suited to?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA large German equatorial mount or observatory pier rated comfortably above the 14.5 kg published tube weight once a full imaging or visual accessory load is added.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is this different from the TOA-130NS and TOA-130NFB?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIt steps up to a 150 mm aperture and a longer 1100 mm focal length, against 130 mm and 1000 mm on the NS and NFB, with a correspondingly heavier 14.5 kg tube.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a 150 mm f\/7.3 ED apochromatic triplet, the largest refractor in Takahashi's TOA line, built for high-resolution visual work and flat-field imaging on a mount rated for its 14.5 kg tube weight.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047053316207,"sku":"TAK-TOK15110","price":18429.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tok1501_1_2_6.jpg?v=1787332814"},{"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":126.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TKA31584_1.jpg?v=1786913882"},{"product_id":"takahashi-toa-150b-0-99x-toa-645-field-flattener","title":"Takahashi TOA-150B 0.99x TOA-645 Field Flattener","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-645 Field Flattener 150 Set is Takahashi's dedicated flattener kit for the TOA-150B refractor, built for high-resolution medium-format imaging. It holds the telescope's own 1100mm f\/7.3 essentially unchanged — 1085mm at f\/7.2 — while flattening the field across a Φ60mm image circle, large enough for today's full-frame and medium-format sensors.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis flattener suits TOA-150B owners shooting with large-format cameras — full-frame CMOS or medium-format backs — who need corner-to-corner sharpness across a wide sensor rather than a reduced focal length. Takahashi's own figures put the RMS spot diameter at 1 micron on-axis and 5 microns at the full 60mm diameter.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-element flattener:\u003c\/strong\u003e two fully multi-coated elements in two groups, purpose-built for digital sensors rather than adapted from a film-era design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eΦ60mm corrected image circle:\u003c\/strong\u003e covers full-frame and medium-format sensors with minimal fall-off.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNear-native focal length:\u003c\/strong\u003e 1085mm at f\/7.2 keeps the TOA-150B's own field of view essentially intact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBundled CA35 (50.8) ring:\u003c\/strong\u003e included in this kit, matched to the TOA-150B's mount so the flattener installs as a complete system.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe flattener threads to the TOA-150B's 50.8 Adapter on an M72x1 male-to-female interface and outputs to the included CA35 ring on an M54x0.75 female thread. Total kit weight is 330g. The corrected back focus is 56.2mm measured from the CA35 ring — the figure to build the rest of your imaging train from. 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\u003eHigh-resolution deep-sky imaging with full-frame or medium-format cameras on the TOA-150B; wide-field mosaicless framing of large nebulae and galaxy fields where the full Φ60mm circle is put to use; observatory and long-exposure narrowband work where field flatness across the whole sensor matters.\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, TKA32587S)\u003c\/td\u003e\n\u003ctd\u003e1085mm\u003c\/td\u003e\n\u003ctd\u003ef\/7.2\u003c\/td\u003e\n\u003ctd\u003eΦ60mm\u003c\/td\u003e\n\u003ctd\u003e56.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTOA-130NS \/ TOA-130NFB\u003c\/td\u003e\n\u003ctd\u003e990mm\u003c\/td\u003e\n\u003ctd\u003ef\/7.6\u003c\/td\u003e\n\u003ctd\u003eΦ60mm\u003c\/td\u003e\n\u003ctd\u003e56.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eTOA-130NS and TOA-130NFB owners use the sibling kit, the TOA-645 Flattener 130 Set (TKA31587S), which bundles the same flattener with a CA Ring 130 sized for that telescope's mount instead of this kit's CA35 ring — we stock this listing for the TOA-150B specifically. The optical element itself is common to both kits.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSold as a complete kit:\u003c\/strong\u003e the CA35 ring is bundled with this flattener, so there's nothing separate to source to reach the 56.2mm back focus figure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBuilt for the TOA-150B:\u003c\/strong\u003e if you own a TOA-130NS or TOA-130NFB instead, the matching kit is the TOA-645 Flattener 130 Set — get in touch and we'll point you to the right one.\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 onto the TOA-150B's 50.8 Adapter and outputs directly to the included CA35 ring, which sets the 56.2mm back focus for you.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHigh-resolution astrophotography on the TOA-150B with full-frame or medium-format sensors, where a flat Φ60mm image circle matters more than a shorter focal length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it reduce the focal length?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBarely — at 0.99x it holds the TOA-150B close to its native 1100mm f\/7.3, landing at 1085mm f\/7.2. It flattens the field rather than speeding up the system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's the difference between this and the TOA-35 Reducer?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis flattener keeps the focal length essentially native while widening the corrected circle to Φ60mm. The TOA-35 Reducer instead cuts the focal length to f\/5.2 for a faster, narrower-circle system — the two serve different imaging goals on the same telescope.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA complete TOA-150B flattener kit that holds the telescope near its native 1100mm focal length at f\/7.2 while flattening a Φ60mm image circle for full-frame and medium-format imaging, with the matched CA35 ring included.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047109415023,"sku":"TAK-TKA32587S","price":1100.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tka32587s-1_3.jpg?v=1786913942"},{"product_id":"takahashi-toa130fn-flattener-wide-t-mount","title":"Takahashi TOA130FN Flattener Wide T-Mount","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA130FN combines a field flattener with a T-mount adapter in one part, built for DSLR and 35mm film photography on the TOA-130. It attaches your camera directly to the telescope through a T-Ring (sold separately), or through the Extender TOA when you need additional focal length.\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-130 and want to shoot with a DSLR or 35mm film body directly on the telescope, with the field corrected for a flat frame.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eCombining the flattener and T-mount interface into a single part removes one connection point from the imaging train compared with fitting a separate flattener and T-ring adapter — fewer joints to seat correctly, and one less place for the stack to drift out of square. The flattener element corrects the field curvature the TOA-130's triplet objective otherwise produces at prime focus.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDSLR and 35mm film astrophotography on the TOA-130\u003c\/strong\u003e at prime focus, corrected for field curvature.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtending the setup\u003c\/strong\u003e with the Extender TOA when a longer focal length is wanted for the same camera.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA camera-specific T-Ring is required and sold separately — the TOA130FN provides the T-mount interface, not the camera-side bayonet. It is also compatible with the Extender TOA for extended focal length work. See the \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e for TOA-130 back focus figures, and send us your camera body if you want the T-Ring confirmed before you order.\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\u003eA T-Ring is not included.\u003c\/strong\u003e It is sold separately and is specific to your camera mount — tell us your camera and we will confirm the right one.\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 TOA-130 and takes a T-Ring on the camera side, combining the flattener and mount into one connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a separate flattener as well?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — the flattener is built into this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it with the Extender TOA?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes — it's compatible with the Extender TOA for extended focal length imaging.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a combined field flattener and T-mount adapter for DSLR and 35mm imaging on the TOA-130, taking a camera-specific T-Ring on the back.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047111643247,"sku":"TAK-TKA31201","price":228.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tca1050_3_6.jpg?v=1786913992"},{"product_id":"takahashi-toa-130-0-7x-toa-35-reducer","title":"Takahashi TOA-130 0.7x TOA-35 Reducer","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-35 Reducer 130 Set pairs Takahashi's 0.7x TOA-35 reducer with a CA Ring 130 sized for the TOA-130NS and TOA-130NFB, cutting the telescope's native 1000mm f\/7.7 down to 698mm f\/5.4. The reducer is a 4-element, 3-group ED glass design shared across the whole TOA-35 line — what changes between kits is which CA ring is bundled to match the telescope it's going on.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis kit suits TOA-130NS and TOA-130NFB owners who want a materially faster focal ratio for deep-sky imaging without leaving the TOA series' ED apochromat optics. At f\/5.4 it cuts exposure times substantially versus the native f\/7.7 while holding a flat Φ44mm image circle.\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 takes the TOA-130NS\/NFB from 1000mm f\/7.7 to 698mm f\/5.4.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eΦ44mm corrected image circle:\u003c\/strong\u003e flat, sharp field suited to APS-C and smaller full-frame crops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBundled CA Ring 130:\u003c\/strong\u003e sized specifically for the TOA-130's mount, so the kit installs as a matched system.\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 CA Ring 130, which is what's bundled in this specific kit — the ring is what changes between TOA-35 Reducer kits, not the reducer optic itself. Back focus is 65.5mm on the TOA-130NS\/NFB. 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-130NS\/NFB where exposure time matters — nebulae, galaxies, and clusters that benefit from f\/5.4 over the native f\/7.7; 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-130NS \/ TOA-130NFB (this kit)\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\u003ctr\u003e\n\u003ctd\u003eTOA-150B\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\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\u003c\/table\u003e\u003cp\u003eThis is the same 0.7x reducer optic used on the TOA-150B and TSA-120, but bundled here with the CA Ring 130 sized for the TOA-130's mount. TOA-150B and TSA-120 owners use the sibling kit, the \u003cstrong\u003eTOA-35 0.7x Reducer and Camera Ring (TOA-150, TSA-102\/120)\u003c\/strong\u003e, which bundles the identical reducer with the larger CA Ring 150 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 130 is bundled with this reducer, so there's no separate ring to source for the TOA-130.\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 130, which is sized to install directly on the TOA-130NS\/NFB.\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-130NS\/NFB where the 0.7x reduction to f\/5.4 shortens exposures versus native f\/7.7.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this the same reducer as the TOA-150 kit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe optic is identical. What differs is the bundled ring — this kit ships with CA Ring 130 for the TOA-130; the TOA-150\/TSA-120 kit ships with CA Ring 150 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 65.5mm 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-130NS\/NFB, cutting the telescope to 698mm at f\/5.4 across a Φ44mm image circle, with the CA Ring 130 included.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047112691823,"sku":"TAK-TKA31580NS","price":1495.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tka31580ns_3.jpg?v=1786914087"},{"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 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; on the TSA-102 at f\/5.6 — each a substantial step down from the telescope's native focal ratio.\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:\u003c\/strong\u003e the same optical design used across every TOA-35 reducer kit, with two of the elements in low-dispersion, high-refractive-index glass.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.7x reduction:\u003c\/strong\u003e a 30% cut in focal length on each compatible telescope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eΦ44mm corrected image circle:\u003c\/strong\u003e flat, sharp field across the reduced focal length — full coverage of APS-C and most 44mm-class sensors.\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\u003eTakahashi builds the TOA-35 as four elements in three groups, two of them in low-dispersion, high-refractive-index glass. It works as a focal reducer and a field corrector at the same time: the 30% reduction in focal length is what makes the telescope faster, and the correction is what keeps a Φ44mm circle flat once it is. Both matter for large-sensor imaging, where the corners are the first place a reducer's limits show.\u003c\/p\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, TSA-120 or TSA-102 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\u003eTSA-102 (this kit)\u003c\/td\u003e\n\u003ctd\u003e575mm\u003c\/td\u003e\n\u003ctd\u003ef\/5.6\u003c\/td\u003e\n\u003ctd\u003eΦ44mm\u003c\/td\u003e\n\u003ctd\u003eNot published for this pairing\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, TSA-120 or TSA-102.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBack focus is the figure to confirm:\u003c\/strong\u003e the corners are where spacing shows, and the total depends on your camera, filter drawer and any spacers in between. Send us what you are connecting and we will add the chain up with you before you order.\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 the telescope's mount. The work is in getting the back focus total right, and that is a calculation we are happy to run for you.\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, TSA-120 or TSA-102 at a faster focal ratio than the 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\/TSA-102; the TOA-130 kit ships with CA Ring 130 instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it cover my sensor?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe corrected circle is Φ44mm, which covers APS-C fully and most 44mm-class sensors. Larger full-frame corners fall outside it.\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 published 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–f\/5.6 depending on the telescope.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047113674863,"sku":"TAK-TKA32580NS","price":1495.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TKA32580_1.jpg?v=1786914118"},{"product_id":"takahashi-2-7-flattener-for-takahashi-toa-130s","title":"Takahashi TOA-35FL 2.7\" Flattener for TSA-120\/TOA-130\/TOA-150B","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-35FL is Takahashi's 2.7-inch field flattener for the TSA-120 and TOA-130\/150 triplet apochromats. It threads onto a 2-inch drawtube and presents a 2-inch female output, correcting the field to a 40mm image circle with essentially no edge distortion, at a published weight of 200 g.\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 TSA-120, TOA-130NS\/NFB, or TOA-150B and are imaging with a CCD or CMOS sensor up to full-frame, where corner star shape needs correcting that the native triplet design does not fully address on its own.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared across three telescopes:\u003c\/strong\u003e the same part flattens the field on the TSA-120, TOA-130NS\/NFB, and TOA-150B, each with its own resulting focal length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40mm corrected image circle:\u003c\/strong\u003e covers virtually all common CCD and CMOS sensor sizes without edge-of-field distortion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e117.5mm back focus\u003c\/strong\u003e held constant across all three host telescopes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 2-inch in-line design:\u003c\/strong\u003e 60mm diameter, 74mm long, 200g.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA and TSA triplet apochromats are corrected for a flat visual field but benefit from a dedicated flattener when imaging across a full sensor. The TOA-35FL sits between the 2-inch drawtube and the camera train, trimming the focal length by a small, telescope-specific amount while holding the 40mm image circle and 117.5mm back focus fixed regardless of which of the three host telescopes it is mounted on.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TKA31582_TOA-35FL_schema.png?v=1786913972\" alt=\"Dimensional diagram of the Takahashi TOA-35FL 2.7 inch Flattener\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eFull-frame and APS-C deep-sky imaging on the TSA-120, TOA-130NS\/NFB, or TOA-150B where flat corner stars are required across the sensor.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTakahashi publishes this flattener for three telescopes.\u003c\/p\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope\u003c\/th\u003e\n\u003cth\u003eNative\u003c\/th\u003e\n\u003cth\u003eWith TOA-35FL\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\u003eTSA-120\u003c\/td\u003e\n\u003ctd\u003e900mm f\/7.5\u003c\/td\u003e\n\u003ctd\u003e880mm f\/7.3\u003c\/td\u003e\n\u003ctd\u003eΦ40mm\u003c\/td\u003e\n\u003ctd\u003e117.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTOA-130NS \/ TOA-130NFB\u003c\/td\u003e\n\u003ctd\u003e1000mm f\/7.7\u003c\/td\u003e\n\u003ctd\u003e980mm f\/7.5\u003c\/td\u003e\n\u003ctd\u003eΦ40mm\u003c\/td\u003e\n\u003ctd\u003e117.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTOA-150B\u003c\/td\u003e\n\u003ctd\u003e1100mm f\/7.3\u003c\/td\u003e\n\u003ctd\u003e1080mm f\/7.2\u003c\/td\u003e\n\u003ctd\u003eΦ40mm\u003c\/td\u003e\n\u003ctd\u003e117.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eFor sensors larger than 40mm, Takahashi's TOA-645 flattener line covers TOA-130 and TOA-150B with a 60mm image circle instead — see the \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e for the full spacing picture.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003e40mm image circle, not full-format:\u003c\/strong\u003e larger sensors needing a 60mm circle should look to the TOA-645 flattener line instead of this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBuilt for imaging:\u003c\/strong\u003e the flattened field has no benefit for eyepiece observing, where the native triplet field is already flat enough.\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 onto the 2-inch drawtube and presents a fixed 117.5mm back focus on the camera side, so there is no spacing to calculate.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFlat-field deep-sky imaging on the TSA-120, TOA-130NS\/NFB, or TOA-150B.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it fit sensors larger than APS-C?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIts 40mm image circle covers most full-frame sensors; for larger formats, Takahashi's TOA-645 flattener (60mm circle) is the better match — send us your sensor size and we will confirm which one you need.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the same part used on all three telescopes?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes — one flattener, with a slightly different resulting focal length on each host telescope.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-35FL is a single 2.7-inch flattener that corrects the field to a 40mm image circle at a fixed 117.5mm back focus across the TSA-120, TOA-130NS\/NFB, and TOA-150B.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047117836399,"sku":"TAK-TKA31582","price":651.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TKA31582_1.jpg?v=1786914243"},{"product_id":"takahashi-toa-645-flattener-0-99x-for-toa-130ns-nfb","title":"Takahashi TOA-645 Flattener 0.99x for TOA-130NS\/NFB","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-645 Flattener is Takahashi's large-format field corrector for the TOA-130NS and TOA-130NFB, holding the focal length essentially unchanged at 990mm f\/7.6 while opening the corrected image circle to 60mm — large enough for today's bigger CMOS sensors. Two lens elements in two groups thread between M72 x 1 male and female interfaces, in a compact 78mm diameter, 42mm long, 265 g housing.\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 TOA-130NS or TOA-130NFB and are imaging with a large-format CMOS sensor where the older 67-series flatteners and the 40mm-circle TOA-35FL fall short of full corner coverage.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e60mm corrected image circle:\u003c\/strong\u003e built for large modern CMOS sensors rather than the 40mm circle of the TOA-35FL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNear-unity focal ratio change:\u003c\/strong\u003e 1000mm f\/7.7 native becomes 990mm f\/7.6 — correction with almost no reach traded away.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTight spot diagrams:\u003c\/strong\u003e Takahashi publishes 1 micron RMS on-axis, rising to 5 microns at the full 60mm diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM72 x 1 threads on both sides,\u003c\/strong\u003e in a compact 78mm x 42mm housing at 265 g.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eWhere the TOA-35FL corrects the TOA-130NS\/NFB to a 40mm circle, the TOA-645 uses two lens elements in two groups to hold correction out to 60mm, addressing the larger sensor formats that have become common since the earlier 67-series flatteners were designed. Takahashi states the newer design performs nearly aberration-free with today's smaller pixel pitches, where the older flatteners show their age.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eFull-frame and medium-format CMOS deep-sky imaging on the TOA-130NS or TOA-130NFB, where corner correction across a 60mm circle is required.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTakahashi publishes this flattener for the TOA-130NS\/NFB.\u003c\/p\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope\u003c\/th\u003e\n\u003cth\u003eNative\u003c\/th\u003e\n\u003cth\u003eWith TOA-645FL\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-130NS \/ TOA-130NFB\u003c\/td\u003e\n\u003ctd\u003e1000mm f\/7.7\u003c\/td\u003e\n\u003ctd\u003e990mm f\/7.6\u003c\/td\u003e\n\u003ctd\u003eΦ60mm\u003c\/td\u003e\n\u003ctd\u003e56.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eThe TOA-150B takes the same optical design in a separate kit, part TKA32587S, which Ontario Telescope lists separately — the two are not interchangeable at the mechanical level despite sharing the optical formula. For smaller-sensor use, the 40mm-circle TOA-35FL is also available. Full spacing detail is 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\u003cp\u003e\u003cstrong\u003eNot interchangeable with the TOA-150B kit:\u003c\/strong\u003e that telescope uses its own TOA-645 flattener kit (TKA32587S) rather than this TOA-130-specific part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBuilt for imaging:\u003c\/strong\u003e the corrected field has no benefit for eyepiece observing.\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 between M72 x 1 interfaces with a fixed 56.2mm back focus, so there is no spacing to calculate.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFull-frame and large-format CMOS deep-sky imaging on the TOA-130NS or TOA-130NFB.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is this different from the TOA-35FL?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe TOA-35FL corrects a 40mm image circle; the TOA-645 corrects out to 60mm for larger sensors, at nearly the same resulting focal length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this fit my TOA-150B?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe TOA-150B uses its own TOA-645 flattener kit rather than this part; send us your telescope model and sensor size and we will confirm which flattener you need.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe TOA-645 Flattener corrects the TOA-130NS\/NFB to a 60mm image circle at essentially its native 990mm f\/7.6, built for the large CMOS sensors that have outgrown the older 40mm-circle flatteners.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047124750447,"sku":"TAK-TKA31587S","price":945.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tka31587s-1_3.jpg?v=1786914538"}],"url":"https:\/\/ontariotelescope.com\/collections\/takahashi-toa.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}