{"title":"SVBONY MK Series Maksutovs","description":"\u003cp\u003eThe SVBONY MK90, MK105, MK105 Pro and MK127 Maksutov-Cassegrains and their kits: sealed, compact tubes with long focal lengths for the Moon, planets and double stars. Part of \u003ca href=\"\/collections\/svbony-telescopes\"\u003eSVBONY Telescopes\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"svbony-mk127-maksutov-cassegrain-telescope","title":"SVBONY MK127 127mm f\/11.8 Maksutov-Cassegrain Telescope OTA with 0.65x Reducer","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-1-kv_20260804155236_3584.webp?v=1791651127\" alt=\"SVBONY MK127 127mm Maksutov-Cassegrain telescope with dielectric-coated optics\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe SVBONY MK127 is a 127 mm Maksutov-Cassegrain optical tube with a 1500 mm focal length at f\/11.8. It uses a Rumak-style layout with a separate secondary mirror rather than an aluminized spot on the meniscus, a 99%-reflectivity dielectric coating on the secondary, and an internal dual-speed focuser. SVBONY includes a dedicated 0.65x focal reducer that brings the system to f\/7.68, so the same tube covers high-magnification lunar and planetary work at f\/11.8 and faster imaging of smaller deep-sky targets at f\/7.68.\u003c\/p\u003e\n\u003cp\u003eThe tube is 145 mm in outer diameter and weighs 2934 g (6.47 lb), with a 210 mm Vixen-style dovetail on two mounting bases. The rear port is an SCT male thread (2\"-24 TPI), and both SCT-to-2\" and SCT-to-1.25\" (with T-thread) adapters come in the box.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis is a good match if you:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eObserve the Moon, planets and double stars:\u003c\/strong\u003e 1500 mm of focal length gives high magnification with moderate-focal-length eyepieces, and the closed tube holds collimation well.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImage planets and the Moon:\u003c\/strong\u003e the long native focal length suits small-pixel planetary cameras without a heavy Barlow stack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWant one tube for planets and small deep-sky targets:\u003c\/strong\u003e the included reducer opens the field for planetary nebulae, globular clusters and small galaxies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTravel or set up quickly:\u003c\/strong\u003e at under 3 kg the MK127 rides on compact alt-az and GoTo mounts that a larger SCT would overload.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt works well as a first serious planetary scope and equally well as a grab-and-go second telescope for an experienced observer.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e127 mm aperture, 1500 mm focal length:\u003c\/strong\u003e f\/11.8 native, with 254x light-gathering power relative to the dark-adapted eye.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRumak-style separated secondary:\u003c\/strong\u003e the secondary is a separate mirror, which SVBONY uses to correct coma and astigmatism and to flatten the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDielectric secondary coating:\u003c\/strong\u003e 99% reflectivity on the secondary mirror; the primary uses a multi-coated precision aluminum coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded 0.65x focal reducer:\u003c\/strong\u003e takes the system to f\/7.68 for a wider field and shorter exposures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal dual-speed focuser:\u003c\/strong\u003e a coarse knob for fast travel and a fine knob for precise focus at high power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaffled tube:\u003c\/strong\u003e anti-reflective paint on the inner wall plus a conical baffle to control stray light.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory collimated:\u003c\/strong\u003e the optical axis is aligned before shipping, and no extension tube is needed to reach focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVixen-style dovetail:\u003c\/strong\u003e 210 mm plate on two mounting bases, removable with M5 hex screws.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-3-func-3_20260804182350_8937.webp?v=1791651127\" alt=\"SVBONY MK127 127mm aperture light-gathering comparison with an 80mm refractor\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-5-dual-speed_20260804183119_2412.webp?v=1791651127\" alt=\"SVBONY MK127 internal dual-speed focuser with coarse and fine focus knobs\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-7-close-up-1_20260804185711_7398.webp?v=1791651127\" alt=\"SVBONY MK127 close-up of focuser and rear cell construction\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-7-close-up-2_20260804185711_7556.webp?v=1791651127\" alt=\"SVBONY MK127 close-up of dovetail mounting bases and tube details\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eLight enters through a full-aperture meniscus corrector, reflects off the spherical primary, and returns through a central hole in the primary after bouncing off the secondary. In a classic Gregory Maksutov the secondary is an aluminized spot on the back of the meniscus. The MK127 uses a separate secondary mirror (a Rumak arrangement), which gives the designer an extra surface to work with. SVBONY uses that freedom for a flatter field with lower coma and astigmatism, which matters most once a camera sensor is in the focal plane.\u003c\/p\u003e\n\u003cp\u003eAs a reflecting design, the MK127 brings all colours to the same focus, so the Moon's limb and bright planets show none of the violet fringing an achromatic refractor produces. The 40.6 mm secondary is coated with a 99%-reflectivity dielectric stack, and the tube is internally blackened and fitted with a conical baffle for contrast.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-6-optical-path_20260804183119_3329.webp?v=1791651127\" alt=\"SVBONY MK127 Maksutov-Cassegrain optical path diagram\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-3-func-1_20260804182210_8685.webp?v=1791651128\" alt=\"SVBONY MK127 Rumak optical system with separated secondary mirror\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-3-func-2_20260804182351_0588.webp?v=1791651127\" alt=\"SVBONY MK127 lunar detail comparison showing low chromatic aberration versus a refractor\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLunar and planetary observing:\u003c\/strong\u003e high-contrast views of Jupiter's cloud belts, Saturn's rings, Mars at opposition and lunar craters. SVBONY lists 254x as a fully usable magnification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlanetary and lunar imaging:\u003c\/strong\u003e at f\/11.8 the native focal length pairs naturally with small-pixel planetary cameras such as the SVBONY SC715C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall deep-sky imaging:\u003c\/strong\u003e with the 0.65x reducer at f\/7.68, planetary nebulae (Ring, Dumbbell, Helix), globular clusters and compact galaxies such as M51.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble stars:\u003c\/strong\u003e long focal length and high image scale for splitting close pairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTravel and quick sessions:\u003c\/strong\u003e a closed tube that arrives collimated and needs no collimation in the field.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-4-065x_20260804183119_1618.webp?v=1791651127\" alt=\"SVBONY MK127 included 0.65x focal reducer taking the telescope from f\/11.8 to f\/7.68\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear thread:\u003c\/strong\u003e SCT male, 2\"-24 TPI, so standard SCT visual backs, diagonals and T-adapters thread on.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded adapters:\u003c\/strong\u003e SCT to 2\" for 2\" diagonals and accessories, and SCT to 1.25\" with T-thread for 1.25\" diagonals or direct camera connection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackfocus with the reducer:\u003c\/strong\u003e 55 mm from the reducer to the sensor. Without the reducer, no specific backfocus applies; the internal focuser simply brings the image to focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReducer:\u003c\/strong\u003e the 0.65x reducer is dedicated to the MK127 and is not designed for other brands of telescope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Vixen-style 210 mm dovetail. At 2934 g plus diagonal and eyepiece (or camera), the tube sits comfortably within the payload of most compact alt-az and small equatorial mounts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual accessories:\u003c\/strong\u003e a 1.25\" or 2\" star diagonal and eyepieces are needed for visual use. The SVBONY SV188P diagonal and SV191 zoom eyepiece suit the MK127 well.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging accessories:\u003c\/strong\u003e for guided deep-sky work, the SVBONY SV106 guide scope or the SV238 off-axis guider with SV226P filter drawer fit the MK127 imaging train.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you want to check a specific camera, filter or guider combination against the 55 mm backfocus, send us your setup and we will work out the spacing with you.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-12-size_20260804185712_4444.webp?v=1791651127\" alt=\"SVBONY MK127 dimensional drawing with measurements\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eWhat's in the Box\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x MK127 Maksutov-Cassegrain optical tube\u003c\/li\u003e\n\u003cli\u003e1 x 0.65x focal reducer\u003c\/li\u003e\n\u003cli\u003e1 x SCT to 2\" adapter\u003c\/li\u003e\n\u003cli\u003e1 x SCT to 1.25\" adapter with T-thread\u003c\/li\u003e\n\u003cli\u003e1 x 1.25\" dust plug\u003c\/li\u003e\n\u003cli\u003e1 x metal objective lens cover\u003c\/li\u003e\n\u003cli\u003e1 x Vixen-style dovetail plate, 210 mm\u003c\/li\u003e\n\u003cli\u003e2 x dovetail mounting bases\u003c\/li\u003e\n\u003cli\u003e10 x screws\u003c\/li\u003e\n\u003cli\u003e1 x user manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSVBONY also supplies a storage bag with the telescope.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-11-box_20260804185712_3669.webp?v=1791651127\" alt=\"SVBONY MK127 package contents including 0.65x reducer, SCT adapters and dovetail\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical tube only:\u003c\/strong\u003e no mount, tripod, finder, diagonal or eyepiece is included. The Vixen-style dovetail fits most small mounts, and the add-ons on this page cover the visual and imaging accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong focal ratio:\u003c\/strong\u003e at f\/11.8 the field of view is narrow, which suits planets and small objects. The included reducer widens it to f\/7.68 for imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCool-down:\u003c\/strong\u003e like any closed-tube Maksutov, the MK127 gives its sharpest views once the optics reach ambient temperature, so setting it out a little before observing helps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDew:\u003c\/strong\u003e the front meniscus is exposed to the night sky, and on humid Ontario nights a dew heater keeps it clear through long sessions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The tube is collimated at the factory, the dovetail drops into any Vixen-style saddle, and the SCT adapters thread on by hand. Add a diagonal and eyepiece and it is ready to observe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the MK127 need an extension tube to reach focus?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. SVBONY confirms it reaches focus without one, as with the rest of the MK series.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 0.65x focal reducer included?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. It ships with the telescope as a standard accessory and is designed specifically for the MK127.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat backfocus does the reducer need?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e55 mm from the reducer to the camera sensor. Without the reducer there is no fixed backfocus figure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the highest useful magnification?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSVBONY rates 254x as fully usable. On nights of steady seeing that is enough for fine planetary detail.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it for visual observing or imaging?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBoth. SVBONY optimized the design primarily for photography, and it performs well visually with a standard diagonal and eyepieces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the dovetail be removed or replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The supplied 210 mm plate is held with M5 hex screws and comes off with an S4 hex wrench.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the outer diameter of the tube?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e145 mm, which is the figure to use when choosing a dew shield or heater strip.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn short: a 127 mm, 1500 mm f\/11.8 Maksutov-Cassegrain with a separated dielectric secondary, dual-speed focuser and an included 0.65x reducer, ready for lunar and planetary observing and imaging at native focal length and for small deep-sky targets at f\/7.68. Add a mount, a diagonal and an eyepiece or camera, and it is complete.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eOptical Diagram Reports\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eSVBONY publishes spot diagrams at native f\/11.8 and at f\/7.6 with the 0.65x reducer, along with optical surface test data.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-8-f118_20260804185711_9196.webp?v=1791651127\" alt=\"SVBONY MK127 spot diagram at native f\/11.8 without reducer\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-8-f76_20260804185711_8300.webp?v=1791651128\" alt=\"SVBONY MK127 spot diagram at f\/7.6 with the 0.65x focal reducer\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-9-data_20260804185712_1938.webp?v=1791651127\" alt=\"SVBONY MK127 optical surface wavefront test data\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n","brand":"SvBony","offers":[{"title":"MK127 OTA","offer_id":67720856895599,"sku":"F9382C","price":726.74,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/mk127-f9382c-1_20251125135022_8600.webp?v=1791651282"}],"url":"https:\/\/ontariotelescope.com\/collections\/svbony-mk-maksutovs.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}