{"title":"Takahashi Starbase","description":"\u003cp\u003eEvery Takahashi Starbase eyepiece we stock, listed by focal length.\u003c\/p\u003e","products":[{"product_id":"takahashi-starbase-ke-20mm-kellner-eyepiece","title":"Takahashi Starbase KE-20mm Kellner Eyepiece","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Starbase KE-20mm is a 20mm Kellner eyepiece from Takahashi's Starbase accessory line, built around a straightforward 2-groups, 3-element optical design. It delivers a 45° apparent field of view and 14mm of eye relief, and weighs 77g. It threads into any standard 1.25” focuser, diagonal, or binoviewer using the same barrel convention as the rest of the Takahashi eyepiece range.\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 a low-power, wide-field eyepiece for a Takahashi refractor or reflector — for scanning star fields, framing open clusters, or getting a bright, comfortable finder-style view before switching to higher power. It also works as a second eyepiece alongside a shorter-focal-length Starbase or TPL for a two-eyepiece kit covering low and high power.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKellner optical design:\u003c\/strong\u003e 2 groups, 3 elements — a simple, well-corrected layout for the center and mid-field of the view.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e45° apparent field of view:\u003c\/strong\u003e a generous window at 20mm focal length, wider than the eyepieces bundled with most starter refractors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e14mm eye relief:\u003c\/strong\u003e comfortable for observing without eyeglasses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e77g weight:\u003c\/strong\u003e light enough not to unbalance a small refractor's focuser.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Kellner design pairs a plano-convex field lens with a cemented achromatic eye lens, a configuration that keeps cost down while holding up well at the center of the field — exactly where a low-power, wide-view eyepiece spends most of its time. At 20mm focal length and f-ratios typical of Takahashi apochromats, the KE-20mm stays undemanding on the eye and forgiving of minor eye placement, which is what the 14mm eye relief figure is doing for you.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eOn a Takahashi FS-60CB (355mm, f\/5.9) the KE-20mm gives roughly 18x — a true wide-field, grab-and-go view of large open clusters and Milky Way star fields. On a TSA-120 (900mm, f\/7.5) the same eyepiece yields about 45x, a comfortable low-power view for scanning before you move to a shorter focal length for detail. Divide any Takahashi tube's focal length by 20mm to get the magnification on your own setup.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eMost of the Starbase and Takahashi eyepiece lines use the 1.25” (31.7mm) barrel standard, which fits every Takahashi focuser, star diagonal, and 2″-to-1.25” adapter in the current catalog.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNot parfocal with the rest of the range:\u003c\/strong\u003e expect to refocus when you swap eyepieces.\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 drops into any 1.25” focuser or diagonal and is ready to use immediately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLow-power, wide-field visual observing — star fields, open clusters, and framing before you switch to a shorter eyepiece for detail.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it work for astrophotography?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIt's built for visual use. For imaging, a dedicated camera train and adapter suited to your telescope's back focus is the better route — see our \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e if you're setting one up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat telescopes does it fit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAny Takahashi refractor or reflector with a standard 1.25” focuser or diagonal.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA 20mm Kellner eyepiece with a 45° field and 14mm of eye relief — a wide, comfortable, low-power view for any Takahashi tube with a 1.25” focuser. If you're building out a full eyepiece set and want help matching focal lengths to your telescope, send us your setup and we'll work it out with you.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047072649327,"sku":"SBP08070","price":64.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sbp08070_3.jpg?v=1786912635"},{"product_id":"takahashi-starbase-or-18mm-orthoscopic-eyepiece","title":"Takahashi Starbase OR-18mm Orthoscopic Eyepiece","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Starbase OR-18mm is an 18mm orthoscopic eyepiece from Takahashi's Starbase accessory line, built on a 4-elements-in-2-groups design that keeps distortion low, particularly toward the center of the field. It has a 45° apparent field of view, 13mm of eye relief, and a 1.25” (31.7mm) barrel that fits standard Takahashi focusers and diagonals. Optical coatings are fully multi-coated throughout.\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 a sharp, low-distortion eyepiece at a moderate focal length — for lunar terrain, double stars, and planetary detail on nights when a mid-power view suits the seeing better than the highest-power eyepiece in your case.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrthoscopic 4-element, 2-group design:\u003c\/strong\u003e favors low distortion and center sharpness over the widest possible field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e45° apparent field of view:\u003c\/strong\u003e a moderate window that keeps the target centered without much drifting during unguided visual sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e13mm eye relief:\u003c\/strong\u003e workable for observers who wear glasses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated optics:\u003c\/strong\u003e reduces internal reflections and improves contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25” (31.7mm) barrel:\u003c\/strong\u003e the Takahashi standard, fits existing focusers and diagonals without an adapter.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eOrthoscopic eyepieces trade field width for correction at the center of the view — the four-element, two-group layout used here is chosen specifically to hold that correction with low distortion, which is why orthoscopics remain a common choice for high-contrast planetary and lunar observing even though wider-field designs have become more common elsewhere in the eyepiece market. At 18mm, the OR-18mm sits toward the low-power end of the Starbase orthoscopic range.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eOn a Takahashi FS-60CB (355mm, f\/5.9) the OR-18mm gives about 20x, a comfortable low-power view for star fields and lunar overviews. On a TSA-120 (900mm, f\/7.5) the same eyepiece yields roughly 50x — a solid all-purpose magnification for the Moon, brighter planets, and double stars. Divide any Takahashi tube's focal length by 18mm for the magnification on your own setup.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe 1.25” (31.7mm) barrel fits any Takahashi focuser, star diagonal, or 2″-to-1.25” adapter already in the current lineup, so it slots into an existing eyepiece case without any extra hardware.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNot parfocal:\u003c\/strong\u003e Takahashi lists this eyepiece as non-parfocal, so a small refocus is needed when you switch to it from another eyepiece.\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 directly into a 1.25” focuser or diagonal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eModerate-power visual observing — lunar detail, double stars, and planets, with the low-distortion correction orthoscopic designs are known for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it differ from the Starbase KE eyepieces?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe KE (Kellner) eyepieces use a simpler 3-element design and lean toward wider, lower-power views; the OR (orthoscopic) eyepieces use a 4-element design tuned for sharper, more distortion-free images at the center of the field.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat telescopes does it fit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAny Takahashi refractor or reflector with a standard 1.25” focuser or diagonal.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eAn 18mm orthoscopic eyepiece with a 45° field, 13mm eye relief, and the standard 1.25” barrel — a sharp, moderate-power choice for lunar and planetary detail. If you're putting together a full eyepiece set and want help matching focal lengths to your telescope, send us your setup and we'll work it out with you.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047073304687,"sku":"SBP08050","price":70.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sbp08050_3.jpg?v=1786912668"},{"product_id":"takahashi-starbase-or-20mm-orthoscopic-eyepiece","title":"Takahashi Starbase OR-20mm Orthoscopic Eyepiece","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Starbase OR-20mm is a 20mm orthoscopic eyepiece from Takahashi's Starbase accessory line, built on the same 4-elements-in-2-groups design as the rest of the OR series, aimed at low distortion toward the center of the field. It has a 45° apparent field of view, 14mm of eye relief, and weighs 82g. Takahashi lists an overall body size of 33mm x 45mm (diameter x length) for this specific model.\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 a low-power orthoscopic view — wider star fields, lunar overviews, and framing shots before switching to a shorter focal length for detail, with the sharper center-field correction orthoscopic designs are built for.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrthoscopic 4-element, 2-group design:\u003c\/strong\u003e low distortion, particularly at the center of the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e45° apparent field of view:\u003c\/strong\u003e a comfortably wide window at this focal length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e14mm eye relief:\u003c\/strong\u003e comfortable for eyeglass wearers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e82g weight:\u003c\/strong\u003e light enough to leave a small refractor's balance unaffected.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe four-element, two-group orthoscopic layout is chosen for correction rather than field width — it holds sharpness and low distortion from the center out, which is the trait orthoscopic eyepieces have historically been valued for on the Moon and planets. At 20mm, the OR-20mm sits at the low-power end of the Starbase orthoscopic range, useful as a wide-view complement to the shorter focal lengths in the same series.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eOn a Takahashi FS-60CB (355mm, f\/5.9) the OR-20mm gives about 18x, a wide, bright view for star fields and open clusters. On a TSA-120 (900mm, f\/7.5) the same eyepiece yields roughly 45x — a comfortable low-power view of the Moon and larger deep-sky targets. Divide any Takahashi tube's focal length by 20mm for the magnification on your own setup.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNot parfocal with the rest of the range:\u003c\/strong\u003e expect to refocus when you swap eyepieces.\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 drops into a standard 1.25” focuser or diagonal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLow-power visual observing — wide star fields and lunar overviews, with the low-distortion correction of an orthoscopic design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it differ from the OR-18mm?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBoth use the same 4-element orthoscopic layout; the OR-20mm's slightly longer focal length gives a touch lower magnification and a marginally larger exit pupil on the same telescope.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat telescopes does it fit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAny Takahashi refractor or reflector with a standard 1.25” focuser or diagonal.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA 20mm orthoscopic eyepiece with a 45° field, 14mm eye relief, and an 82g weight — a wide, low-power view built around the same distortion-controlled optics as the rest of the Starbase OR series. If you're building a full eyepiece set and want help matching focal lengths to your telescope, send us your setup and we'll work it out with you.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047073566831,"sku":"SBP08060","price":70.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sbp08060_3.jpg?v=1786912698"},{"product_id":"takahashi-starbase-ke-25mm-kellner-eyepiece","title":"Takahashi Starbase KE-25mm Kellner Eyepiece","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Starbase KE-25mm is a 25mm Kellner eyepiece from Takahashi's Starbase accessory line, built around the same 2-groups, 3-element optical layout as the KE-20mm. It delivers a 45° apparent field of view and 18mm of eye relief, and weighs 77g — the longest focal length, and so the lowest power and widest exit pupil, in the Starbase Kellner pairing.\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 lowest-power, widest-view eyepiece in your case — for locating targets, scanning the Milky Way, or getting a bright, easy view before moving to a shorter focal length for detail.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKellner optical design:\u003c\/strong\u003e 2 groups, 3 elements, simple and well-corrected at the center of the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e45° apparent field of view:\u003c\/strong\u003e a wide window at 25mm focal length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18mm eye relief:\u003c\/strong\u003e generous, comfortable for eyeglass wearers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e77g weight:\u003c\/strong\u003e matches the KE-20mm, so the pair balances the same way in a focuser.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Kellner layout — a plano-convex field lens paired with a cemented achromatic eye lens — keeps the design simple while holding correction at the center of the field, which is where a low-power, wide-view eyepiece like this one is used most. At 25mm, this is the longer of the two Starbase Kellner focal lengths, producing the largest exit pupil and lowest magnification in the pairing.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eOn a Takahashi FS-60CB (355mm, f\/5.9) the KE-25mm gives about 14x, a very wide, bright view suited to large star fields and the Milky Way. On a TSA-120 (900mm, f\/7.5) the same eyepiece yields roughly 36x — useful as a locating eyepiece before switching to higher power. Divide any Takahashi tube's focal length by 25mm for the magnification on your own setup.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eMost of the Starbase and Takahashi eyepiece lines use the 1.25” (31.7mm) barrel standard, which fits every current Takahashi focuser, star diagonal, and 2″-to-1.25” adapter.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNot parfocal with the rest of the range:\u003c\/strong\u003e expect to refocus when you swap eyepieces.\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 drops into any 1.25” focuser or diagonal and is ready to use immediately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLow-power, wide-field visual observing — locating targets, scanning star fields, and framing before you switch to a shorter focal length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it compare to the KE-20mm?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSame Kellner design and weight; the KE-25mm's longer focal length gives a lower magnification and larger exit pupil on the same telescope, useful as the wide end of a two-eyepiece kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat telescopes does it fit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAny Takahashi refractor or reflector with a standard 1.25” focuser or diagonal.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA 25mm Kellner eyepiece with a 45° field and 18mm of eye relief — the widest, lowest-power option in the Starbase Kellner pairing. If you're building out a full eyepiece set and want help matching focal lengths to your telescope, send us your setup and we'll work it out with you.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047075008623,"sku":"SBP08080","price":72.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sbp08080_3.jpg?v=1786912734"},{"product_id":"takahashi-starbase-or-14mm-orthoscopic-eyepiece","title":"Takahashi Starbase OR-14mm Orthoscopic Eyepiece","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Starbase OR-14mm is a 14mm orthoscopic eyepiece from Takahashi's Starbase accessory line, built on the series' 4-elements-in-2-groups design for low distortion toward the center of the field. It has a 45° apparent field of view, 12mm of eye relief, weighs 70g, and Takahashi lists an overall body size of 33mm x 38mm (diameter x length) for this model.\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 a mid-to-high power eyepiece for planetary detail, lunar craters, and splitting closer double stars, with the sharp, low-distortion correction orthoscopic designs are known for.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrthoscopic 4-element, 2-group design:\u003c\/strong\u003e low distortion, particularly at the center of the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e45° apparent field of view:\u003c\/strong\u003e steady framing at moderate-to-high power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12mm eye relief:\u003c\/strong\u003e workable for eyeglass wearers at this focal length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e70g weight:\u003c\/strong\u003e light enough not to unbalance a small refractor's focuser.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe four-element, two-group orthoscopic layout holds sharpness and low distortion from the center outward, the trait that has kept orthoscopic designs in regular use for lunar and planetary observing even as wide-field alternatives have become more common. At 14mm, the OR-14mm sits in the middle of the Starbase orthoscopic range — short enough for real planetary detail, long enough to stay easy on the eye.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eOn a Takahashi FS-60CB (355mm, f\/5.9) the OR-14mm gives about 25x, useful for lunar overviews and brighter deep-sky targets. On a TSA-120 (900mm, f\/7.5) the same eyepiece yields roughly 64x — enough for real planetary and lunar detail on a night of average seeing. Divide any Takahashi tube's focal length by 14mm for the magnification on your own setup.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTakahashi's product page for the OR-14mm gives a 33mm x 38mm overall body size rather than a separate barrel-diameter figure. The rest of the Starbase orthoscopic line uses the 1.25” (31.7mm) barrel standard that fits every current Takahashi focuser and diagonal.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNot parfocal with the rest of the range:\u003c\/strong\u003e expect to refocus when you swap eyepieces.\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 directly into a standard 1.25” focuser or diagonal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMid-to-high power visual observing — planetary detail, lunar craters, and closer double stars.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it compare to the OR-9mm?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSame 4-element orthoscopic design; the OR-14mm's longer focal length gives lower magnification and a larger, more forgiving exit pupil on the same telescope.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat telescopes does it fit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAny Takahashi refractor or reflector with a standard 1.25” focuser or diagonal.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA 14mm orthoscopic eyepiece with a 45° field, 12mm eye relief, and a 70g weight — a sharp mid-power choice for planetary and lunar detail. If you're building a full eyepiece set and want help matching focal lengths to your telescope, send us your setup and we'll work it out with you.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047075467375,"sku":"SBP08040","price":77.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sbp08040_3.jpg?v=1786912762"},{"product_id":"takahashi-starbase-or-9mm-orthoscopic-eyepiece","title":"Takahashi Starbase OR-9mm Orthoscopic Eyepiece","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Starbase OR-9mm is a 9mm orthoscopic eyepiece from Takahashi's Starbase accessory line, built on the series' 4-elements-in-2-groups design for low center-field distortion. It has a 45° apparent field of view, 7mm of eye relief, weighs 52g, and Takahashi lists an overall body size of 33mm x 35mm (diameter x length) for this model — one of the shorter, higher-power focal lengths in the Starbase orthoscopic range.\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 a high-power eyepiece for planetary detail, lunar close-ups, or splitting tighter double stars, on nights when the seeing supports it.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrthoscopic 4-element, 2-group design:\u003c\/strong\u003e low distortion at the center of the field, where high-power planetary detail lives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e45° apparent field of view:\u003c\/strong\u003e steady framing even at high power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7mm eye relief:\u003c\/strong\u003e workable without glasses; tighter for eyeglass wearers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e52g weight:\u003c\/strong\u003e negligible load on the focuser.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eAt short focal lengths, the correction an orthoscopic design holds at the center of the field matters more, not less — that's exactly where high-power planetary and lunar detail is formed. The 9mm OR keeps the same four-element, two-group layout as the rest of the Starbase orthoscopic series, scaled down for the shorter focal length and correspondingly higher magnification.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eOn a Takahashi TSA-120 (900mm, f\/7.5) the OR-9mm gives about 100x, a solid all-around planetary magnification. On a Takahashi FS-60CB (355mm, f\/5.9) the same eyepiece yields roughly 39x, useful for brighter deep-sky objects at moderate power on a smaller travel scope. Divide any Takahashi tube's focal length by 9mm for the magnification on your own setup.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNot parfocal with the rest of the range:\u003c\/strong\u003e expect to refocus when you swap eyepieces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e7mm eye relief is tighter than the longer Starbase focal lengths:\u003c\/strong\u003e workable bare-eyed; eyeglass wearers may find it easier to observe without glasses and adjust focus for their own correction instead.\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 directly into a standard 1.25” focuser or diagonal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHigh-power visual observing — planetary detail, lunar close-ups, and tighter double stars.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it compare to the OR-6mm?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSame 4-element orthoscopic design and barrel convention; the OR-9mm's slightly longer focal length gives a somewhat lower magnification and more forgiving eye relief.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat telescopes does it fit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAny Takahashi refractor or reflector with a standard 1.25” focuser or diagonal.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA 9mm orthoscopic eyepiece with a 45° field, 7mm eye relief, and a 52g weight — a high-power option for planetary and lunar detail. If you're building a full eyepiece set and want help matching focal lengths to your telescope, send us your setup and we'll work it out with you.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047075598447,"sku":"SBP08030","price":79.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sbp08030_3.jpg?v=1786912792"},{"product_id":"takahashi-starbase-or-6mm-orthoscopic-eyepiece","title":"Takahashi Starbase OR-6mm Orthoscopic Eyepiece","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Starbase OR-6mm is a 6mm orthoscopic eyepiece from Takahashi's Starbase accessory line, and the shortest, highest-power focal length in the series. It uses the same 4-elements-in-2-groups design as the rest of the OR range, with a 43° apparent field of view, 4mm of eye relief, and a 1.25” (31.7mm) barrel with fully multi-coated optics.\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 highest practical magnification in a Starbase orthoscopic eyepiece — for planetary detail, close double stars, and lunar close-ups on nights when the atmosphere holds steady.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrthoscopic 4-element, 2-group design:\u003c\/strong\u003e low distortion at the center of the field, where high-power detail is formed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e43° apparent field of view:\u003c\/strong\u003e slightly narrower than the rest of the Starbase OR line, typical at this short a focal length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4mm eye relief:\u003c\/strong\u003e tight — workable bare-eyed, demanding for eyeglass wearers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated optics:\u003c\/strong\u003e keeps contrast up despite the high element count for the size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25” (31.7mm) barrel:\u003c\/strong\u003e the Takahashi standard, fits existing focusers and diagonals.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eShort-focal-length orthoscopic eyepieces put the most demand on the four-element, two-group design's center-field correction, since that is where all the magnification and detail is concentrated. The OR-6mm holds the same design language as the rest of the Starbase orthoscopic line at a scale built specifically for high power, which is also why the eye relief tightens up and the apparent field narrows slightly compared to its longer siblings.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eOn a Takahashi TSA-120 (900mm, f\/7.5) the OR-6mm gives about 150x, useful for planetary detail and close double stars on a night of good seeing. On a Takahashi FS-60CB (355mm, f\/5.9) the same eyepiece yields roughly 59x, a solid high-power option for a small travel refractor. Divide any Takahashi tube's focal length by 6mm for the magnification on your own setup — and remember that atmospheric seeing, not the eyepiece, usually sets the practical ceiling on a given night.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe 1.25” (31.7mm) barrel fits any Takahashi focuser, star diagonal, or 2″-to-1.25” adapter already in the current lineup, so it slots into an existing eyepiece case without extra hardware.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNot parfocal:\u003c\/strong\u003e Takahashi lists this eyepiece as non-parfocal, so refocusing is needed when you switch to it from another eyepiece.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e4mm eye relief is tight:\u003c\/strong\u003e comfortable without glasses; eyeglass wearers may prefer a longer-eye-relief eyepiece for this magnification range, or observing without glasses and adjusting focus to compensate.\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 directly into a standard 1.25” focuser or diagonal. The tight eye relief takes a bit more care in positioning your eye than a longer-eye-relief eyepiece, but no tools or adjustment are involved.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHigh-power visual observing — planetary detail, lunar close-ups, and close double stars, on nights with steady seeing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does it compare to the OR-9mm?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSame 4-element orthoscopic design; the OR-6mm's shorter focal length gives higher magnification, a narrower field, and tighter eye relief.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat telescopes does it fit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAny Takahashi refractor or reflector with a standard 1.25” focuser or diagonal.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA 6mm orthoscopic eyepiece with a 43° field and a 1.25” barrel — the highest-power option in the Starbase orthoscopic line, built for planetary and lunar detail. If you're building a full eyepiece set and want help matching focal lengths to your telescope, send us your setup and we'll work it out with you.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047075958895,"sku":"SBP08020","price":91.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sbp08020_3.jpg?v=1786912825"}],"url":"https:\/\/ontariotelescope.com\/collections\/takahashi-starbase.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}