{"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":8580.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TOK13010_TOA-130NS_OTA_1.jpg?v=1786911747","url":"https:\/\/ontariotelescope.com\/products\/takahashi-toa-130ns-130mm-f-7-7-triplet-refractor-ota-with-mef-2-7-focuser","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}