{"title":"Télescopes Maksutov-Cassegrain Orion Optics UK OMC","description":"\u003cp\u003eLes télescopes Maksutov-Cassegrain Orion Optics UK OMC sont des tubes optiques fermés et compacts à longue focale, adaptés à la Lune, aux planètes et aux étoiles doubles. La gamme comprend l'OMC140 De-Luxe, l'OMC 185 De-Luxe et l'OMC200 De-Luxe à tube carbone et optique 1\/8 PV.\u003c\/p\u003e\u003cp\u003eLe tube fermé demande peu de collimation et protège l'optique de la poussière. Ces instruments conviennent aux observateurs qui veulent des images nettes à fort grossissement avec un tube court et transportable.\u003c\/p\u003e","products":[{"product_id":"orion-optics-uk-omc-140-de-luxe-optical-tube-assembly","title":"Orion Optics UK OMC140 De-Luxe Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e140mm (5.5\") Maksutov-Cassegrain Optics\u003c\/li\u003e\n\u003cli\u003e2000mm Focal Length at f\/14\u003c\/li\u003e\n\u003cli\u003eGuaranteed 1\/6 PV Wavefront Hand-Figured Optics\u003c\/li\u003e\n\u003cli\u003eLightweight 3.5kg Carbon Fibre Tube\u003c\/li\u003e\n\u003cli\u003eZero Image Shift Micrometer Focuser\u003c\/li\u003e\n\u003cli\u003eHilux High-Reflectivity Mirror Coatings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eOrion Optics UK OMC140 De-Luxe Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK OMC140 De-Luxe delivers high-magnification views from a remarkably compact package, combining a 140mm aperture with a powerful 2000mm focal length. This f\/14 Maksutov-Cassegrain is built around a hand-figured optical system guaranteed to a 1\/6 PV wavefront accuracy, housed in a thermally stable carbon fibre tube that weighs only 3.5kg. With its zero image shift micrometer focuser and high-reflectivity Hilux coatings, the OMC140 is engineered for uncompromising planetary, lunar, and double-star observation and imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eProfessional-Grade 1\/6 PV Optics: The Orion Optics UK Standard\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the OMC140 is an optical system manufactured to a standard far exceeding mass-produced telescopes. Each mirror set is hand-figured and tested in the UK to achieve a 1\/6 PV (peak-to-valley) wavefront error, ensuring images are limited only by atmospheric seeing, not the telescope. This level of optical precision, combined with Hilux coatings, produces exceptionally high-contrast views, resolving fine details like the Cassini Division in Saturn's rings and subtle banding on Jupiter's disk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCompact f\/14 Design in a 3.5kg Carbon Fibre Tube\u003c\/h3\u003e\n\u003cp\u003eThe OMC140 packs its 2000mm focal length into a tube just 450mm long and weighing a mere 3.5kg. This impressive portability is made possible by the Maksutov-Cassegrain design and a lightweight carbon fibre tube, which also provides superior thermal stability compared to aluminum, minimizing focus shift during temperature changes. The result is an ideal \"grab-and-go\" instrument for high-resolution work that performs exceptionally well on light-to-medium duty equatorial mounts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHigh-Magnification Specialist: A 2000mm Focal Length for Planetary Imaging\u003c\/h3\u003e\n\u003cp\u003eWith its f\/14 focal ratio, the OMC140 is a specialized instrument designed to excel at high magnification. The long 2000mm focal length provides the image scale necessary to capture fine planetary detail with modern CMOS cameras without requiring aggressive Barlow lenses. The \"Zero image shift micrometer\" focuser is critical for this application, moving the secondary mirror to achieve focus without the lateral image movement (mirror flop) that plagues many competing Cassegrain designs. This stability ensures your target remains perfectly centered while making precise focus adjustments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOMC140 vs. Schmidt-Cassegrains: The Maksutov Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile similar in function to a Schmidt-Cassegrain (SCT), the OMC140's Maksutov-Cassegrain design offers distinct advantages for the discerning observer.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocusing Stability:\u003c\/strong\u003e The OMC140's micrometer-based secondary focusing system eliminates the image shift inherent in the moving-primary-mirror focusers of most SCTs. This is a decisive advantage for high-magnification imaging and visual work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Quality Guarantee:\u003c\/strong\u003e The 1\/6 PV wavefront accuracy is a certified specification, not a typical marketing claim. This ensures a higher level of performance out of the box compared to the lottery of mass-produced optics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmaller Obstruction:\u003c\/strong\u003e The 44mm secondary mirror creates a central obstruction of 31% by diameter, which is modest for this design and contributes to higher image contrast compared to some SCTs with larger obstructions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the OMC140 De-Luxe's 1\/6 PV optics special?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e1\/6 PV wavefront\u003c\/strong\u003e specification is a guarantee of optical precision. It means the shape of the mirror surface deviates from a perfect parabola by no more than 1\/6th the wavelength of light. This is significantly better than the \"diffraction-limited\" standard (1\/4 PV) of many mass-produced telescopes and results in visibly sharper, higher-contrast images, especially on challenging targets like planets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the f\/14 OMC140 suitable for deep-sky objects like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe OMC140's long 2000mm focal length and f\/14 ratio create a very narrow field of view, making it unsuitable for framing large objects like the Andromeda Galaxy (M31) or the Pleiades (M45). It excels at smaller deep-sky targets that benefit from high magnification, such as planetary nebulae like the Ring Nebula (M57), globular clusters like M13, and details within brighter galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the 3.5kg OMC140?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a tube weight of only \u003cstrong\u003e3.5kg\u003c\/strong\u003e, the OMC140 is very lightweight and places minimal demand on a mount. For visual use, a mount like a Sky-Watcher AZ-GTi or a Celestron Advanced VX would be more than sufficient. For long-exposure astrophotography, a mount in the HEQ5 or CEM26 class would provide excellent stability and tracking accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the \"Zero image shift micrometer\" focusing on the OMC140 work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis system adjusts focus by moving the secondary mirror with a high-precision micrometer mechanism, rather than moving the entire primary mirror as in most SCTs. This design prevents the lateral \"image shift\" or \"mirror flop\" that can move a target off a small sensor chip during critical focusing, making it a superior solution for high-magnification planetary imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2-inch eyepieces with the OMC140?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the OMC140 is designed with a \u003cstrong\u003e31.7mm (1.25-inch) optical back\u003c\/strong\u003e. It is optimized for use with 1.25-inch eyepieces and accessories. This is a deliberate design choice to maintain the compact form factor and is well-suited to the high-magnification planetary and double-star work the telescope is intended for.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the OMC140 perform on Jupiter with its 2000mm focal length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e2000mm focal length\u003c\/strong\u003e gives the OMC140 the native image scale needed to resolve fine details on Jupiter. Combined with the 1\/6 PV optics, you can expect to clearly see features like the Great Red Spot, intricate cloud bands, festoons, and the shadows of the Galilean moons transiting the planet's disk, provided the atmospheric seeing is good.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e140mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2000mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV Wavefront (De-Luxe Model)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocusing Method\u003c\/td\u003e\n\u003ctd\u003eZero image shift micrometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eHilux on both mirrors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon Fibre (De-Luxe Model)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e450mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e3.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Back\u003c\/td\u003e\n\u003ctd\u003e31.7mm (1.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Fixing\u003c\/td\u003e\n\u003ctd\u003eStandard Vixen-style Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eOMC140 De-Luxe Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003eThis product includes the optical tube assembly only. Finders, diagonals, and eyepieces are sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942378991901,"sku":"OOUK-OMC-140-DE-LUXE-OPTICAL","price":1862.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_89eab899-625d-4154-a02c-1eddd17ef7b0.jpg?v=1789607148"},{"product_id":"orion-optics-uk-omc-185-de-luxe-optical-tube-assembly","title":"Orion Optics UK OMC 185 De-Luxe Optical tube assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMaksutov-Cassegrain optical design\u003c\/li\u003e\n\u003cli\u003eSized between the OMC140 and OMC200\u003c\/li\u003e\n\u003cli\u003eBuilt to order in the UK\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eOMC185 Maksutov-Cassegrain OTA\u003c\/h2\u003e\n\u003cp\u003eThe OMC185 is a Maksutov-Cassegrain optical tube assembly in Orion Optics UK's OMC series, sized between the OMC140 and OMC200.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Mid-Size OMC\u003c\/h3\u003e\n\u003cp\u003eIndividually built to order in the UK; contact Orion Optics UK for full OMC185 specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003eOMC Maksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eOMC185 De-Luxe Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942379090205,"sku":"OOUK-OMC-185-DE-LUXE-OPTICAL","price":3635.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_459d4731-8a6c-492b-8ad1-fa9f3d905cb5.jpg?v=1789607156"},{"product_id":"orion-optics-uk-omc200-de-luxe-optical-tube-assembly-carbon-tube-1-8pv","title":"Orion Optics UK OMC200 De-Luxe Tube Assembly – Carbon Tube 1\/8PV","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e200mm (8\") Maksutov-Cassegrain Optics\u003c\/li\u003e\n\u003cli\u003e4000mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/20 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eGuaranteed 1\/8 PV Wavefront Accuracy\u003c\/li\u003e\n\u003cli\u003eVented Carbon Fibre Tube Construction\u003c\/li\u003e\n\u003cli\u003e100% Zero Image Shift Micrometer Focuser\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eOrion Optics UK OMC200 De-Luxe Tube Assembly – Carbon Tube 1\/8PV\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK OMC200 De-Luxe delivers uncompromising planetary, lunar, and double-star views through its 200mm aperture and long 4000mm focal length. This f\/20 Maksutov-Cassegrain is built around hand-figured optics guaranteed to a research-grade 1\/8 PV wavefront accuracy, ensuring maximum contrast and sharpness. Housed in a 600mm vented carbon fibre tube, the entire assembly weighs only 9kg, placing high-resolution capability within reach of many modern mounts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 1\/8 PV Maksutov-Cassegrain System\u003c\/h3\u003e\n\u003cp\u003eAt the core of the OMC200 is a 200mm optical system hand-finished in the UK to a demanding 1\/8 PV wavefront standard. This level of precision, typically reserved for research instruments, means the optics deliver textbook-perfect star images and capture the finest, lowest-contrast details on planetary surfaces. The Maksutov-Cassegrain design features a small 44mm secondary mirror, minimizing central obstruction to further enhance contrast, while Hilux coatings on both mirrors maximize light transmission.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCarbon Fiber Tube and Zero-Shift Focusing at 4000mm\u003c\/h3\u003e\n\u003cp\u003eMaintaining precise focus at a 4000mm focal length is critical, and the OMC200's mechanical design is built for stability. The carbon fibre tube has a near-zero coefficient of thermal expansion, preventing focus shift during temperature changes, while integrated vents allow for faster thermal acclimation. Unlike typical Schmidt-Cassegrains, focusing is achieved with a 100% zero image shift micrometer, which moves the secondary mirror with extreme precision and completely eliminates the image movement that can plague primary mirror focusing systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAn f\/20 Instrument for High-Resolution Targets\u003c\/h3\u003e\n\u003cp\u003eThe f\/20 focal ratio is a deliberate design choice that makes the OMC200 a specialist's tool for high-magnification observing and imaging. This long focal ratio provides high power with comfortable, long eye-relief eyepieces and eliminates the need for Barlow lenses, which can introduce optical aberrations. This makes it an ideal instrument for resolving tight double stars, intricate lunar rilles, and subtle cloud features on Jupiter and Saturn right at the native focal plane.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e1\/8 PV vs. Standard Optics: A Difference You Can See\u003c\/h3\u003e\n\u003cp\u003eOrion Optics UK offers multiple grades of optical quality, and the 1\/8 PV \"Research Grade\" of the OMC200 De-Luxe represents a significant step up from standard 1\/4 PV optics. This isn't just a number; it translates to visibly higher contrast and image sharpness at the eyepiece.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Contrast:\u003c\/strong\u003e The smoother, more accurate mirror surface of 1\/8 PV optics scatters less light, rendering the blackness of space darker and faint planetary details more distinct.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharper Details:\u003c\/strong\u003e During moments of steady atmospheric seeing, the superior wavefront correction allows the telescope to resolve finer details, such as the Cassini Division in Saturn's rings or delicate festoons in Jupiter's cloud belts, with greater clarity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImage Stability:\u003c\/strong\u003e A more accurate wavefront is less susceptible to degradation from atmospheric turbulence, meaning you get more moments of perfect, stable viewing during an observing session.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Orion Optics UK OMC200 De-Luxe f\/20?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe f\/20 focal ratio is optimized for high-magnification planetary, lunar, and double-star observation. It provides a large image scale without the need for additional amplifiers like Barlow lenses, which simplifies the optical train and maximizes contrast and sharpness on fine details. This makes the OMC200 a specialized instrument, trading wide-field capability for exceptional high-power views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 1\/8 PV wavefront of the OMC200 mean for views of Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA 1\/8 PV wavefront error is significantly better than the \"diffraction-limited\" standard of 1\/4 PV. For an object like Jupiter, this translates to:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Contrast:\u003c\/strong\u003e The boundaries between cloud belts and zones will be sharper and more defined.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiner Detail:\u003c\/strong\u003e You will be able to more easily resolve small, low-contrast features like barges, ovals, and festoons within the cloud belts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter Color Fidelity:\u003c\/strong\u003e With less scattered light, the subtle color variations across the planet's disk are more apparent.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the OMC200 De-Luxe focuser prevent image shift?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe OMC200 uses a \u003cstrong\u003emicrometer-style focuser\u003c\/strong\u003e that moves the secondary mirror, not the primary mirror. In many catadioptric telescopes, focusing is done by shifting the large primary mirror, which can cause it to tilt slightly, leading to \"image shift.\" By moving the much smaller, lighter secondary mirror, the OMC200's mechanism provides precise, stable focus with zero lateral image movement, which is critical for high-magnification imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the carbon fibre tube on the OMC200 De-Luxe a significant advantage?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Carbon fibre has a very low coefficient of thermal expansion, meaning it doesn't shrink or expand significantly as the ambient temperature changes throughout the night. At a long focal length of 4000mm, even a tiny change in tube length can shift the focal point. The carbon fibre tube ensures the focus you set at the beginning of the night remains sharp for hours, a crucial feature for long imaging sessions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the OMC200 De-Luxe for deep-sky imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile possible, it is not its primary design function. The very long f\/20 focal ratio results in a narrow field of view and requires much longer exposure times for faint deep-sky objects compared to faster instruments. The OMC200 excels at imaging smaller targets like planetary nebulae and globular clusters, but it is not well-suited for large nebulae or galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the 9kg OMC200 De-Luxe OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the tube itself weighs only 9kg, the 4000mm focal length acts like a massive lever, magnifying any vibrations from wind or mount drives. For visual use, a mount rated for at least a 15-20kg payload (e.g., EQ6-R Pro class) is recommended for stability. For astrophotography, a higher capacity mount is essential to ensure sharp, untrailed images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e4000mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavefront Accuracy\u003c\/td\u003e\n\u003ctd\u003e1\/8 PV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e210mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eHilux on both mirrors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocusing Method\u003c\/td\u003e\n\u003ctd\u003e100% zero image shift micrometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon Fibre with vents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e600mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e9kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Back\u003c\/td\u003e\n\u003ctd\u003e31.7mm (1.25\"), 2\" available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Fixing\u003c\/td\u003e\n\u003ctd\u003eDovetail of your choice\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942379188509,"sku":"OOUK-OMC200-DE-LUXE-OPTICAL-TUBE","price":13925.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_524ea082-3ca2-4b17-980a-a9c9b00d01df.jpg?v=1789607164"}],"url":"https:\/\/davidastro.com\/fr\/collections\/orion-optics-uk-omc-maksutov-cassegrain-telescopes.oembed","provider":"David Astro","version":"1.0","type":"link"}