{"product_id":"takahashi-fct-65d-triplet-refractor-ota","title":"Takahashi FCT-65D 65mm f\/6.2 Fluorite Triplet Apochromatic Refractor OTA","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Takahashi FCT-65D is a compact fluorite triplet apochromatic refractor: 65 mm of aperture at 403 mm focal length, working at f\/6.2. It is small enough to travel with and corrected well enough to image with, which is an unusual combination in a telescope this size.\u003c\/p\u003e\u003cp\u003eTwo design decisions define it. The objective is a fluorite triplet, made in Japan — three elements, one of them fluorite, which is what brings chromatic aberration down to the point where bright stars and planetary limbs stay free of colour fringing. And the tube is built to a 95 mm outside diameter specifically so that Takahashi's high-performance reducer fits \u003cem\u003einside\u003c\/em\u003e the body rather than hanging off the back, which keeps the imaging train short.\u003c\/p\u003e\u003cp\u003eA camera angle adjuster is built into the tube, so framing rotates without adding another component to the train.\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 one telescope that travels easily and images seriously — wide-field deep-sky work at 403 mm, or a high-quality grab-and-go instrument for visual sessions. It also works as a premium guide scope on a larger rig.\u003c\/p\u003e\u003cp\u003eIf you are moving up from a starter achromat, the difference here is colour correction and star shape rather than raw aperture: 65 mm is not a light bucket, and it is not trying to be. What it gives you is a clean, tight image across the field.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e65 mm fluorite triplet objective:\u003c\/strong\u003e three elements including fluorite, for colour correction well beyond a doublet achromat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e403 mm focal length at f\/6.2:\u003c\/strong\u003e a wide field with enough focal length for framed deep-sky targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e95 mm aluminium tube:\u003c\/strong\u003e sized to take the high-performance reducer internally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in camera angle adjuster:\u003c\/strong\u003e rotate the camera for framing without a separate CAA in the train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated optics:\u003c\/strong\u003e for transmission and contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in Japan:\u003c\/strong\u003e Takahashi's own optical manufacture.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA refractor's weakness is colour: different wavelengths focus at slightly different points, and the result is a violet halo around bright objects and a softening of fine detail. A doublet using ED glass reduces it substantially; a triplet with a fluorite element reduces it further still. Fluorite has optical dispersion characteristics that no ordinary glass matches, which is why Takahashi has built their reputation on it — and why a 65 mm fluorite triplet resolves detail more cleanly than its aperture alone would suggest.\u003c\/p\u003e\u003cp\u003eThe 95 mm tube diameter is the other deliberate figure. Most reducers thread onto the back of a telescope and add length to the imaging train, which eats backfocus and moves the sensor further from the optics. Building the tube wide enough to house the reducer internally avoids that: the corrector sits inside the body, and the train behind the focuser stays short. On a small travel refractor, where every millimetre of backfocus counts once a filter drawer and camera are attached, that matters more than it would on a large instrument.\u003c\/p\u003e\u003cp\u003eAt f\/6.2 the telescope is fast enough for reasonable exposure times without being so fast that spacing tolerances become unforgiving.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eWide-field deep-sky astrophotography — large nebulae, open clusters, and extended objects that a longer focal length would crop. Visual observing of star fields, clusters and the Moon. Travel and grab-and-go sessions where a full-size refractor stays home. Guiding duty alongside a larger imaging telescope.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eSupplied as an \u003cstrong\u003eoptical tube assembly only\u003c\/strong\u003e. To put it on a mount you will also need tube rings or a holder and a dovetail plate.\u003c\/p\u003e\u003cp\u003eWe stock the matched accessories for this telescope:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/takahashi-fct-65d-0-65x-fu-reducer\"\u003eFCT-65D 0.65x FU Reducer\u003c\/a\u003e — the high-performance reducer the 95 mm body is built to house internally.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/takahashi-multi-ca-ring-65d\"\u003eMulti CA Ring 65D\u003c\/a\u003e — the camera-angle ring for this tube.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/takahashi-95mm-tube-holder-ring-fct-65\"\u003e95mm Tube Holder Ring (FCT-65)\u003c\/a\u003e — Takahashi's own holder, sized to the 95 mm tube.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNo case, finderscope or diagonal is included. If you are planning the full imaging train — camera, filter drawer, spacers — send us the parts and we will work the backfocus through with you before you order.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eOptical tube only:\u003c\/strong\u003e the mount, tube rings and dovetail are separate. We stock the matched Takahashi holder and can suggest a mount to suit how you plan to use it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNo case, finder or diagonal in the box:\u003c\/strong\u003e for visual use you will want a diagonal and an eyepiece, and we stock Takahashi's own.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e65 mm is a wide-field aperture:\u003c\/strong\u003e this telescope is built for framing large objects cleanly rather than for high-magnification planetary work. On planets it gives a sharp, well-corrected image at modest magnification — if planetary detail is your main interest, a longer instrument suits better, and we are happy to talk that through.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTakahashi's own figures differ slightly:\u003c\/strong\u003e their specification table gives 403 mm focal length while their description text rounds to 400 mm. We publish the specification figure, 403 mm.\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 small refractor with a built-in camera angle adjuster, so there is less to assemble than on most imaging setups. The tube seats in its holder, the holder bolts to the mount, and the camera angle rotates on the telescope itself rather than on an extra part in the train.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat can I photograph with it?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAt 403 mm and f\/6.2 it suits large nebulae, open clusters and extended objects — targets that need field rather than magnification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need the reducer?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNot to use the telescope. The FU reducer widens the field further and speeds the system, and this tube was designed to house it internally, so the two are a natural pair.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat else do I need to get started?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA mount, tube rings or a holder, and a dovetail plate. For visual use, a diagonal and eyepieces. We stock all of it — tell us how you plan to use it and we will put a list together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does fluorite actually do?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIt controls the way different wavelengths of light come to focus, which is what removes colour fringing around bright objects and keeps fine detail crisp.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it as a guide scope?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes — it is a capable guider on a larger rig, though most guiders cost considerably less.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA 65 mm fluorite triplet at 403 mm and f\/6.2, built around a 95 mm body that takes its reducer internally and a camera angle adjuster that is already part of the tube — a small refractor built to be imaged with.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54069312618607,"sku":"TAK-TSK06510","price":2087.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tck06510-1.jpg?v=1787161882","url":"https:\/\/ontariotelescope.com\/products\/takahashi-fct-65d-triplet-refractor-ota","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}