{"title":"Orion Optics UK Telescopes","description":"\u003cp\u003eOrion Optics UK telescopes are optical tube assemblies from a British maker of Newtonian and Cassegrain optics. The collection covers VX and IDEAL Newtonians from 6\" to 16\" with long focal length L versions, CT carbon fibre Newtonians, AG Newtonian astrographs up to the AG20, and ODK corrected Dall-Kirkham astrographs in closed tube and truss designs.\u003c\/p\u003e\u003cp\u003eTubes are sold without mounts, so you can pair them with your own equatorial mount, a Dobsonian base or an observatory pier.\u003c\/p\u003e","products":[{"product_id":"orion-optics-uk-ag8-optical-tube-assembly-only","title":"Orion Optics UK AG8 f\/3.8 Astrograph OTA","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e200mm (8-inch) Primary Mirror\u003c\/li\u003e\n\u003cli\u003e760mm Focal Length\u003c\/li\u003e\n\u003cli\u003eExtremely Fast f\/3.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e45mm Corrected Flat Field Circle\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e3\" Ceres Rack and Pinion Focuser with 10:1 Reduction\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 AG8 f\/3.8 Astrograph OTA\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK AG8 Optical Tube Assembly is a dedicated imaging instrument, combining a fast 200mm f\/3.8 primary mirror with a 4-lens ED corrector to produce a 45mm flat image circle. Its 760mm focal length frames large deep-sky targets, while the carbon fibre sandwich tube construction maintains focus stability at a low weight of approximately 6kg. With tight stellar spot sizes of just 4.1µm on-axis and 8.1µm at the edge of the field, the AG8 delivers sharp, coma-free stars across full-frame sensors.\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\u003eFast f\/3.8 Optics: The 200mm Primary and 4-Lens Corrector\u003c\/h3\u003e\n\u003cp\u003eThe AG8 is built for speed. The 200mm primary mirror operates at a native f\/3.8, drastically reducing exposure times compared to f\/5 or f\/6 systems and allowing you to capture more data in a single night. This aggressive focal ratio is managed by an integrated 4-lens ED corrector, which eliminates off-axis coma and produces a flat field, ensuring that stars remain pinpoint across the entire frame.\u003c\/p\u003e\n\u003cp\u003eThe 90mm secondary mirror provides even illumination over the 45mm image circle, a necessary design choice for a fast, wide-field astrograph. While this large central obstruction compromises some contrast for high-resolution planetary viewing, it is an essential trade-off for achieving the bright, wide-field performance required for deep-sky 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\u003eAstrograph Engineering: Carbon Fibre Tube and 3\" Ceres Focuser\u003c\/h3\u003e\n\u003cp\u003eAn imaging platform must be mechanically rigid and thermally stable. The AG8's tube is constructed from a carbon fibre sandwich material, which has a near-zero coefficient of thermal expansion. This prevents the 760mm focal length from shifting as temperatures drop overnight, keeping your images perfectly focused. The entire optical tube weighs only approximately 6kg, placing less demand on your equatorial mount.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\" Ceres Focuser:\u003c\/strong\u003e This heavy-duty rack and pinion focuser provides a rigid, flex-free connection for your imaging train. The 10:1 fine-focus knob allows for precise adjustments, critical for achieving sharp focus at f\/3.8.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9-Point Mirror Cell:\u003c\/strong\u003e The primary mirror rests on a CNC machined, 9-point flotation cell that provides uniform support without introducing astigmatism or other optical distortions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFull-Frame Imaging: A 45mm Flat Field with 8.1µm Edge Spots\u003c\/h3\u003e\n\u003cp\u003eThe AG8 is designed to illuminate large sensors without compromise. The optical system delivers a fully corrected, flat image circle of 45mm in diameter, easily covering full-frame (36x24mm) and many medium-format CMOS and CCD sensors. This allows you to capture vast targets like the North American Nebula (NGC 7000) or the Andromeda Galaxy (M31) in a single frame.\u003c\/p\u003e\n\u003cp\u003eThe optical correction is quantified by the stellar spot sizes. On-axis, stars are focused to a tight 4.1µm, and even at the extreme edge of the 45mm field, the spot size is only 8.1µm. This ensures that whether your guide star is in the center or the corner of your off-axis guider, the stars in your final image are round and sharp.\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\u003eActive Thermal Control: 3 Integrated Cooling Fans\u003c\/h3\u003e\n\u003cp\u003eRapidly cooling the 200mm primary mirror to match the ambient air temperature is crucial for achieving the best image sharpness. The AG8 includes three controllable fans integrated into the rear mirror cell. By actively circulating air across the back of the mirror, you can dramatically reduce the cooling time, minimizing tube currents and ensuring your telescope is ready for imaging almost immediately after setup.\u003c\/p\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through the included Professional grade and the optional Ultra (Lambda\/10 PV) upgrade, under identical conditions -- a visual illustration of the difference in contrast and fine detail the upgrade delivers.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through the Ultra (Lambda\/10 PV) grade optics upgrade\"\u003e\n\u003cp\u003eLambda\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 kind of camera sensor is the Orion Optics UK AG8 designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG8 is optimized for large-format sensors. Its integrated corrector produces a \u003cstrong\u003e45mm flat image circle\u003c\/strong\u003e, which is large enough to fully illuminate full-frame sensors (36mm x 24mm) and many popular APS-C and smaller medium-format astronomy cameras without vignetting or distorted stars at the edges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the f\/3.8 focal ratio of the AG8 affect my imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn f\/3.8 focal ratio is extremely fast, allowing the telescope to gather light much more quickly than systems with higher f-ratios. This means you can achieve the same image brightness with significantly shorter sub-exposure times, reducing the demands on your mount's tracking accuracy and allowing you to collect more data on a target in a single session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 3\" Ceres focuser on the AG8 strong enough for a heavy camera and filter wheel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003e3\" Ceres Rack and Pinion focuser\u003c\/strong\u003e is a heavy-duty unit designed specifically to handle the weight and leverage of modern imaging trains. Its rack and pinion design prevents the slippage and flexure common with Crayford-style focusers when under heavy load, ensuring your camera, filter wheel, and off-axis guider remain perfectly aligned.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the AG8's carbon fibre tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG8's \u003cstrong\u003ecarbon fibre sandwich tube\u003c\/strong\u003e provides two main advantages for astrophotography. First, it has an extremely low thermal expansion coefficient, meaning it won't shrink or expand significantly with temperature changes, which keeps the focus stable throughout the night. Second, it has a high stiffness-to-weight ratio, resulting in a rigid tube that weighs only \u003cstrong\u003eapprox. 6kg\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the AG8 perform when imaging the Andromeda Galaxy (M31) with a full-frame DSLR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG8 is an excellent choice for this target. Its \u003cstrong\u003e760mm focal length\u003c\/strong\u003e provides a good image scale for capturing detail in M31's dust lanes and star-forming regions. More importantly, the \u003cstrong\u003e45mm corrected image circle\u003c\/strong\u003e will fully cover your full-frame sensor, allowing you to capture the galaxy and its satellite companions, M32 and M110, in a single, wide, flat field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat back focus distance do I need to maintain for the AG8's corrector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Orion Optics UK AG8 requires a precise spacing from the corrector to your camera sensor to achieve its specified image quality. You must maintain a back focus distance of \u003cstrong\u003e79mm\u003c\/strong\u003e from the mounting flange of the corrector to the focal plane (your camera's sensor).\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the AG8 available in a higher optical grade?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG8 ships with Orion Optics UK's Professional (1\/6 PV) hand-figured optics as standard, each supplied with its own Zygo interferometer test report. For imagers who want the tightest possible star images, an Ultra (Lambda\/10 PV) hand-figured optics upgrade is available, further reducing the spot sizes across the field.\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\u003e200mm (8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e760mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/3.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Image Circle\u003c\/td\u003e\n\u003ctd\u003e45mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (On-Axis)\u003c\/td\u003e\n\u003ctd\u003e4.1µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e8.1µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus Distance\u003c\/td\u003e\n\u003ctd\u003e79mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Ceres Rack and Pinion with 10:1 Reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Design\u003c\/td\u003e\n\u003ctd\u003e4-lens ED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e90mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminum, 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e255mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e635mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003eApprox. 6kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Hardware\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminum cradles \u0026amp; 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\u003c\/ul\u003e\n\u003c\/li\u003e\n\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":"Professional (1\/6 PV)","offer_id":52942359200029,"sku":"OOUK-AG8-OPTICAL-TUBE-ASSEMBLY-ONLY","price":7586.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (Lambda\/10 PV)","offer_id":52942359232797,"sku":"OOUK-AG8-OPTICAL-TUBE-ASSEMBLY-ONLY-2","price":7720.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_39d816cf-1a11-40e9-8b68-941f5ac4ae6f.jpg?v=1789606569"},{"product_id":"orion-optics-uk-ag10-optical-tube-assembly-only","title":"Orion Optics UK AG10 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e250mm (10-inch) Primary Mirror\u003c\/li\u003e\n\u003cli\u003e950mm Focal Length\u003c\/li\u003e\n\u003cli\u003eExtremely Fast f\/3.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e50mm Fully Corrected Flat Image Field\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e3-inch Ceres Rack and Pinion Focuser with 10:1 Reduction\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 AG10 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK AG10 Astrograph combines a 250mm primary mirror with an exceptionally fast f\/3.8 focal ratio to dramatically reduce exposure times. Its integrated 4-lens ED corrector produces a 50mm flat field, delivering pinpoint stars from a 3.0µm on-axis spot size to just 7.2µm at the edge of the frame. Housed in a rigid carbon fibre sandwich tube weighing approximately 12kg, the AG10 is a purpose-built instrument for serious deep-sky imagers using large-format sensors.\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\u003eFast f\/3.8 Optics with a 50mm Corrected Field\u003c\/h3\u003e\n\u003cp\u003eThe core of the AG10 is its optical speed. At f\/3.8, you can capture deep signal on faint targets in a fraction of the time required by f\/8 or f\/10 systems. This speed is made usable by a sophisticated 4-lens ED corrector integrated into the optical path. This design delivers a 50mm diameter, fully-corrected image circle, ensuring your images are free of coma and field curvature even on full-frame and larger sensors.\u003c\/p\u003e\n\u003cp\u003eThe optical correction is engineered to produce incredibly tight stars, with a measured spot size of only 3.0µm on-axis and 7.2µm at the field edge. This level of correction allows you to take full advantage of the resolving power of modern, small-pixel CMOS and CCD cameras, capturing fine details in distant galaxies and nebulae.\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 Fibre Sandwich Tube: 12kg of Thermal Stability\u003c\/h3\u003e\n\u003cp\u003eTo maintain precise focus through changing temperatures, the AG10 is built with a carbon fibre sandwich tube. This material exhibits a near-zero coefficient of thermal expansion, preventing the 950mm focal length from shifting as the night air cools. The entire optical tube assembly weighs approximately 12kg, placing it within the capacity of many mid-range equatorial mounts.\u003c\/p\u003e\n\u003cp\u003eThe tube measures 810mm in length with a 300mm diameter, providing ample rigidity to support the optical components without flexure. All mechanical components, including the mirror cell and mounting hardware, are CNC machined from aluminum for a precise, stable fit.\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\u003e3-inch Ceres Focuser and 9-Point Mirror Cell\u003c\/h3\u003e\n\u003cp\u003eThe AG10 is equipped with a robust 3-inch Ceres rack and pinion focuser. This large-aperture focuser is designed to carry heavy imaging trains, including large cameras, filter wheels, and off-axis guiders, without sagging or shifting. The 10:1 dual-speed reduction allows for extremely fine focus adjustments, which is critical for achieving sharp stars at such a fast focal ratio.\u003c\/p\u003e\n\u003cp\u003eThe 250mm primary mirror is supported by a 9-point suspension mirror cell, also CNC machined. This cell distributes the weight of the mirror evenly to prevent astigmatism and other optical distortions, preserving the hand-figured quality of the primary optic regardless of the telescope's orientation.\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\u003eActive Thermal Management: 3 Integrated Cooling Fans\u003c\/h3\u003e\n\u003cp\u003eA large primary mirror must reach thermal equilibrium with the ambient air to deliver sharp images. The AG10 accelerates this process with three controllable cooling fans built directly into the rear mirror cell. This active cooling system dramatically reduces the time it takes for the 250mm mirror to acclimate, letting you start imaging sooner and minimizing the effects of tube currents.\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\u003eOrion Optics AG10 vs. a 10-inch Ritchey-Chrétien Astrograph\u003c\/h3\u003e\n\u003cp\u003eImagers considering a 10-inch astrograph often compare the AG10 Newtonian to a similarly-sized Ritchey-Chrétien (RC). While both are excellent instruments, they serve different priorities.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvantage RC:\u003c\/strong\u003e A well-collimated RC offers excellent correction across a large field without a corrector in the optical train and is inherently free of coma. They typically have longer focal lengths, making them well-suited for smaller targets like planetary nebulae and galaxies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvantage AG10:\u003c\/strong\u003e The primary advantage is speed. At f\/3.8, the AG10 gathers light over four times faster than a typical f\/8 RC, meaning a 5-minute exposure on the AG10 is equivalent to a 20-minute exposure on the RC. The AG10's built-in 4-lens corrector delivers a 50mm flat field out of the box, whereas an RC often requires an additional, costly field flattener or reducer to achieve similar performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through the included Professional grade and the optional Ultra (Lambda\/10 PV) upgrade, under identical conditions -- a visual illustration of the difference in contrast and fine detail the upgrade delivers.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through the Ultra (Lambda\/10 PV) grade optics upgrade\"\u003e\n\u003cp\u003eLambda\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 is the main advantage of the AG10's f\/3.8 focal ratio?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage of an \u003cstrong\u003ef\/3.8 focal ratio\u003c\/strong\u003e is the significant reduction in exposure time. Compared to a more common f\/8 system, the AG10 captures the same amount of light on a target in approximately one-quarter of the time. This allows you to gather more data in a single night and reduces the demands on your mount's tracking accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow large a sensor can the Orion Optics AG10 fully illuminate and correct?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG10 is designed to produce a \u003cstrong\u003e50mm flat, corrected image circle\u003c\/strong\u003e. This is large enough to accommodate full-frame sensors (36x24mm) and even some medium-format sensors without significant vignetting or distortion at the corners, making it ideal for capturing wide-field mosaics of targets like the North America Nebula (NGC 7000).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need to collimate the AG10 frequently?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eLike all fast Newtonians, the AG10 requires precise collimation for optimal performance. However, its rigid carbon fibre tube and CNC-machined components provide excellent stability. While you should check collimation before each imaging session, the telescope is designed to hold that alignment well during transport and use.\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 AG10 Optical Tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG10 OTA weighs approximately \u003cstrong\u003e12kg (26.5 lbs)\u003c\/strong\u003e. For astrophotography, you will also add a camera, guider, and other accessories, likely bringing the total payload to 15-18kg. A mount with a rated payload capacity of at least 45-50 lbs (approx. 20-23kg) is recommended to ensure stable, precise tracking for long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the AG10 perform on a target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG10 is exceptionally well-suited for large targets like the Andromeda Galaxy (M31). Its \u003cstrong\u003e950mm focal length\u003c\/strong\u003e and \u003cstrong\u003e50mm corrected field\u003c\/strong\u003e allow you to frame the entire galaxy and its companions (M32 and M110) on a full-frame sensor. The fast f\/3.8 optics will capture faint outer dust lanes and star-forming regions with relatively short sub-exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the AG10 come with a specific optical grade like 1\/8 PV?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG10 ships with Orion Optics UK's Professional (1\/6 PV) hand-figured optics as standard, confirmed by Zygo interferometer testing and supplied with its own test report. For imagers who want the tightest possible star images, an Ultra (Lambda\/10 PV) hand-figured optics upgrade is available. The tight \u003cstrong\u003e3.0µm on-axis spot size\u003c\/strong\u003e is a direct result of this precision manufacturing process.\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\u003e250mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e950mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/3.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Construction\u003c\/td\u003e\n\u003ctd\u003eCarbon Fibre Sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003eApprox. 12kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e810mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminum, 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Ceres Rack and Pinion with 10:1 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Design\u003c\/td\u003e\n\u003ctd\u003e4-lens ED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Field Size\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocus Distance to Image Plane\u003c\/td\u003e\n\u003ctd\u003e79mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (On-Axis)\u003c\/td\u003e\n\u003ctd\u003e3.0µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e7.2µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Hardware\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminum cradles and 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\"\u003eAG10 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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCNC Tube Rings (Cradles)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDovetail Mounting Bar\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":"Professional (1\/6 PV)","offer_id":52942360084765,"sku":"OOUK-AG10-OPTICAL-TUBE-ASSEMBLY-ONLY","price":9949.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (Lambda\/10 PV)","offer_id":52942360117533,"sku":"OOUK-AG10-OPTICAL-TUBE-ASSEMBLY-ONLY-2","price":10104.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_cf105491-29bd-4e55-b4cf-e5613b077b53.jpg?v=1789606641"},{"product_id":"orion-optics-uk-ag12-optical-tube-assembly-only","title":"Orion Optics UK AG12 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e300mm (12\") Primary Mirror\u003c\/li\u003e\n\u003cli\u003e1140mm Focal Length\u003c\/li\u003e\n\u003cli\u003eFast f\/3.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e\u0026gt;50mm Corrected Flat Field\u003c\/li\u003e\n\u003cli\u003e3\" Ceres Rack and Pinion Focuser with 10:1 Reduction\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 AG12 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK AG12 Astrograph combines a 300mm primary mirror with a fast 1140mm focal length (f\/3.8) to capture faint deep-sky objects with significantly shorter exposures. Its integrated 4-lens ED corrector delivers a flat field greater than 50mm, producing pinpoint stars with spot sizes as small as 1.7µm on-axis and 4.6µm at the edge of the field. The entire optical tube weighs approximately 16kg and is housed in a rigid 980mm carbon fibre sandwich tube for thermal and mechanical stability.\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\u003eFast f\/3.8 Optics: A 300mm Aperture with a \u0026gt;50mm Flat Field\u003c\/h3\u003e\n\u003cp\u003eThe AG12 is engineered for wide-field deep-sky imaging, pairing a large 300mm aperture with an aggressive f\/3.8 focal ratio. This combination gathers immense amounts of light quickly, reducing the required sub-exposure time and allowing you to capture more data in a single night. The integrated 4-lens ED corrector flattens the field across an image circle greater than 50mm, fully illuminating large format CMOS and CCD sensors without vignetting or distorted stars at the edges.\u003c\/p\u003e\n\u003cp\u003eThe optical correction delivers incredibly tight star images, with a measured spot size of just 1.7µm on-axis and 4.6µm at the field edge. This ensures that whether you are imaging the vast star clouds of the Milky Way or the faint outer arms of a distant galaxy, the AG12 resolves fine details across the entire frame.\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 Fibre Construction: A 16kg Tube with 3-Fan Active Cooling\u003c\/h3\u003e\n\u003cp\u003eTo maintain precise focus through changing temperatures, the AG12 utilizes a carbon fibre sandwich tube. This material exhibits minimal thermal expansion, preventing the focal plane from shifting during long imaging sessions. The optical tube assembly weighs approximately 16kg and has a length of 980mm, requiring a robust equatorial mount for stable imaging.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e9-Point Mirror Cell:\u003c\/strong\u003e The primary mirror is supported by a CNC machined 9-point suspension cell, which prevents flexure and maintains collimation as the telescope moves across the sky.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive Cooling:\u003c\/strong\u003e Three controllable fans are integrated into the mirror cell to accelerate the cooling of the primary mirror, helping you reach thermal equilibrium faster for sharper images at the start of your session.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e110mm Secondary Mirror:\u003c\/strong\u003e The large secondary mirror is necessary to fully illuminate the wide, corrected field of the f\/3.8 system, ensuring bright, even fields for large-sensor cameras.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready Focus System: 3\" Ceres Focuser and 79mm of Back Focus\u003c\/h3\u003e\n\u003cp\u003eThe AG12 comes standard with the robust 3\" Ceres rack and pinion focuser. This heavy-duty focuser is designed to carry complex imaging trains without slipping or flexing, ensuring your camera, filter wheel, and off-axis guider remain perfectly aligned. The 10:1 dual-speed reduction knob allows for incredibly fine adjustments, making it easy to achieve critical focus.\u003c\/p\u003e\n\u003cp\u003eA generous 79mm of back focus (focus distance to image plane) provides ample room to install a variety of accessories. This space is critical for accommodating filter wheels, off-axis guiders, and adaptive optics systems between the corrector and your camera sensor, giving you complete flexibility in configuring your imaging setup.\u003c\/p\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through the included Professional grade and the optional Ultra (Lambda\/10 PV) upgrade, under identical conditions -- a visual illustration of the difference in contrast and fine detail the upgrade delivers.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through the Ultra (Lambda\/10 PV) grade optics upgrade\"\u003e\n\u003cp\u003eLambda\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 size imaging sensor can the Orion Optics AG12 fully illuminate?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG12 is designed with a \u003cstrong\u003e4-lens ED corrector\u003c\/strong\u003e that produces a corrected, flat image circle \u003cstrong\u003egreater than 50mm\u003c\/strong\u003e in diameter. This is large enough to accommodate full-frame sensors (43mm diagonal) and even some medium-format sensors without significant vignetting or loss of star sharpness at the corners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope mount is required for the AG12 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG12 optical tube weighs approximately \u003cstrong\u003e16kg\u003c\/strong\u003e and has a length of \u003cstrong\u003e980mm\u003c\/strong\u003e. When you add a large camera, guide scope, and other accessories, the total payload will be significantly higher. A robust equatorial mount with a payload capacity of at least 25-30kg (55-66 lbs) is recommended for stable, long-exposure astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the f\/3.8 focal ratio of the AG12 benefit imaging the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe fast \u003cstrong\u003ef\/3.8 focal ratio\u003c\/strong\u003e allows the AG12 to collect light very rapidly. For a large, relatively bright target like the Andromeda Galaxy (M31), this means you can capture its faint outer arms and dust lanes with much shorter sub-exposures compared to a slower f\/8 or f\/10 system. The \u003cstrong\u003e1140mm focal length\u003c\/strong\u003e provides an ideal image scale for framing the entire galaxy on a full-frame sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the AG12 a good choice for high-magnification planetary imaging of Jupiter or Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the AG12's 300mm aperture provides high theoretical resolution, its primary design is for wide-field, deep-sky imaging. The large \u003cstrong\u003e110mm secondary mirror\u003c\/strong\u003e creates a significant central obstruction (approx. 37%), which reduces contrast on fine planetary details compared to a telescope with a smaller obstruction. For optimal planetary results, a Barlow lens would be required to increase the effective focal length.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the three cooling fans on the AG12's mirror cell?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe three controllable fans are part of the AG12's active cooling system. They draw ambient air across the back of the 300mm primary mirror, helping it reach the outside temperature more quickly. This process minimizes internal tube currents and ensures the sharpest possible images from the very start of an observing session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow much space does the AG12 provide for an imaging train?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG12 provides \u003cstrong\u003e79mm\u003c\/strong\u003e of distance from the focuser's connection point to the corrected focal plane. This is known as back focus and is critical for astrophotography. This generous distance allows you to easily install accessories like an off-axis guider (OAG), a filter wheel, and any necessary adapters while still being able to bring your camera to a sharp focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the AG12 available in a higher optical grade?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG12 ships with Orion Optics UK's Professional (1\/6 PV) hand-figured optics as standard, each supplied with its own Zygo interferometer test report. For imagers who want the tightest possible star images, an Ultra (Lambda\/10 PV) hand-figured optics upgrade is available, further reducing the spot sizes across the field.\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\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1140mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/3.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Field Size\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (On-Axis)\u003c\/td\u003e\n\u003ctd\u003e1.7µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e4.6µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e79mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003eApprox. 16kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e980mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon Fibre Sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e110mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC Machined Aluminium, 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Ceres Rack and Pinion, 10:1 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Design\u003c\/td\u003e\n\u003ctd\u003e4-lens ED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Hardware\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium cradles and 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\"\u003eAG12 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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCNC Machined Aluminium Cradles\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 set\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDovetail Plate\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\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":"Professional (1\/6 PV)","offer_id":52942361067805,"sku":"OOUK-AG12-OPTICAL-TUBE-ASSEMBLY-ONLY","price":13253.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (Lambda\/10 PV)","offer_id":52942361100573,"sku":"OOUK-AG12-OPTICAL-TUBE-ASSEMBLY-ONLY-2","price":13449.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_5650e8c0-f065-4511-a557-7988771ce545.jpg?v=1789606706"},{"product_id":"orion-optics-uk-ag14-optical-tube-assembly-only","title":"Orion Optics UK AG14 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e350mm Primary Mirror Diameter\u003c\/li\u003e\n\u003cli\u003e1330mm Focal Length (f\/3.8)\u003c\/li\u003e\n\u003cli\u003e\u0026gt;50mm Corrected Flat Field\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e3.4µm On-Axis Spot Size\u003c\/li\u003e\n\u003cli\u003e3\" Ceres Rack and Pinion 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\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 AG14 Optical Tube Assembly\u003c\/h2\u003e\n      \u003cp\u003eThe Orion Optics UK AG14 Optical Tube Assembly combines a massive 350mm primary mirror with an incredibly fast f\/3.8 focal ratio to dramatically reduce exposure times on faint deep-sky objects. Its integrated 4-lens ED corrector delivers a flat field larger than 50mm, producing sharp stars with spot sizes as small as 3.4µm on-axis and 4.7µm at the field edge. This 1330mm focal length astrograph is engineered for the largest modern sensors, providing professional-grade results from a precision-built instrument.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003ef\/3.8 Corrected Newtonian Optics: A \u0026gt;50mm Flat Field\u003c\/h3\u003e\n      \u003cp\u003eThe AG14's optical system is designed for one purpose: wide-field imaging. The fast f\/3.8 primary mirror gathers immense amounts of light, while the custom-designed 4-lens ED corrector eliminates coma and field curvature. This results in a corrected image circle greater than 50mm, fully illuminating full-frame and larger format astronomy cameras without vignetting or distorted stars at the edge of the frame.\u003c\/p\u003e\n      \u003cp\u003eWith measured spot sizes of just 3.4µm on-axis and 4.7µm at the field edge, the AG14 delivers resolution capable of matching the smallest pixels on modern CMOS sensors. This ensures that every star is a tight, focused point, capturing maximum detail in galactic dust lanes and nebular structures.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eCarbon Fibre Tube \u0026amp; 9-Point Mirror Support\u003c\/h3\u003e\n      \u003cp\u003eTo maintain optical precision, the AG14 is built around a carbon fibre sandwich tube with a diameter of 400mm. This material offers exceptional rigidity at a manageable weight of approximately 24kg and, more importantly, exhibits near-zero thermal expansion. As temperatures drop during an imaging session, the 1203mm tube length remains constant, preventing focus shift that can ruin long exposures.\u003c\/p\u003e\n      \u003cp\u003eThe 350mm primary mirror is held securely by a CNC-machined aluminum 9-point suspension cell, which provides uniform support to prevent gravitational flexure as the telescope tracks across the sky. For rapid thermal stabilization, the mirror cell is equipped with three controllable fans to bring the primary mirror to ambient temperature quickly, minimizing tube currents and ensuring sharp images from the start of your session.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003e3\" Ceres Focuser with 79mm Back Focus\u003c\/h3\u003e\n      \u003cp\u003eThe AG14 comes standard with a robust 3\" Ceres rack and pinion focuser, designed to handle the weight of large cameras and heavy accessory stacks without slipping or tilting. A 10:1 reduction fine-focus knob allows for precise adjustments critical for achieving perfect focus with the fast f\/3.8 optical system. The focuser provides a generous 79mm of distance from its flange to the image plane, offering ample room for off-axis guiders, filter wheels, and rotators in your imaging train.\u003c\/p\u003e\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through the included Professional grade and the optional Ultra (Lambda\/10 PV) upgrade, under identical conditions -- a visual illustration of the difference in contrast and fine detail the upgrade delivers.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through the Ultra (Lambda\/10 PV) grade optics upgrade\"\u003e\n\u003cp\u003eLambda\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat cameras are suitable for the AG14's \u0026gt;50mm image circle?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe AG14 is designed to work with large-format sensors. Its \u003cstrong\u003e\u0026gt;50mm flat field size\u003c\/strong\u003e will fully illuminate full-frame (36x24mm) and even larger medium-format CCD or CMOS cameras, ensuring you can utilize the entire field of view without significant vignetting or loss of sharpness at the corners.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow critical is collimation for an f\/3.8 system like the AG14?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eExtremely critical. Fast optical systems like this \u003cstrong\u003ef\/3.8 astrograph\u003c\/strong\u003e have a very small tolerance for optical misalignment. Precise collimation is essential to achieve the advertised spot sizes and edge-to-edge sharpness. It is recommended to use a high-quality laser collimator and check collimation regularly, especially after transport.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main benefit of the AG14's carbon fibre tube?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary benefit is \u003cstrong\u003ethermal stability\u003c\/strong\u003e. Carbon fibre has a very low coefficient of thermal expansion, meaning the \u003cstrong\u003e1203mm focal length\u003c\/strong\u003e will not change significantly as the ambient temperature drops overnight. This prevents focus shift, a common problem with metal tubes that can soften images during long-exposure astrophotography.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the AG14 perform on a large target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe AG14 is ideal for a target like M31. Its \u003cstrong\u003e1330mm focal length\u003c\/strong\u003e and \u003cstrong\u003e\u0026gt;50mm corrected field\u003c\/strong\u003e allow you to frame the entire galaxy and its companions (M32 and M110) on a full-frame sensor. The fast \u003cstrong\u003ef\/3.8 focal ratio\u003c\/strong\u003e would allow you to capture faint outer dust lanes and star clouds with significantly shorter total integration time compared to a slower f\/8 or f\/10 system.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan the AG14 resolve fine detail in the Orion Nebula's Trapezium (M42)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. While it's a wide-field instrument, the AG14's optical quality is high enough for detailed work. The extremely small \u003cstrong\u003e3.4µm on-axis spot size\u003c\/strong\u003e means it can produce very tight, sharp stars. When paired with a camera with small pixels and good seeing conditions, it can resolve the individual stars within the Trapezium cluster and the fine, wispy details in the surrounding nebulosity.\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 AG14 OTA?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWith a tube weight of approximately \u003cstrong\u003e24kg\u003c\/strong\u003e, plus the added weight of a large camera, filter wheel, and guide scope, you will need a high-capacity equatorial mount. A mount with an instrumental payload capacity of at least 45kg (100 lbs) is recommended to ensure stability and precise tracking for long-exposure imaging.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the AG14 available in a higher optical grade?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AG14 ships with Orion Optics UK's Professional (1\/6 PV) hand-figured optics as standard, each supplied with its own Zygo interferometer test report. For imagers who want the tightest possible star images, an Ultra (Lambda\/10 PV) hand-figured optics upgrade is available, further reducing the spot sizes across the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1330mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/3.8\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCorrector Design\u003c\/td\u003e\n\u003ctd\u003e4 lens ED\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFlat Field Size\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSpot Size (On Axis)\u003c\/td\u003e\n\u003ctd\u003e3.4µm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e4.7µm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e120mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocus Distance to Image Plane\u003c\/td\u003e\n\u003ctd\u003e79mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Ceres Rack and Pinion, 10:1 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003eapprox. 24kg\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1203mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium, 9 point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMirror \/ Tube Cooling\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans, heaters optional\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMounting Hardware\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium cradles + dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eProduct Note\u003c\/td\u003e\n\u003ctd\u003eAG14 Optical Tube Assembly Only. Specifications may belong to other variants in the series.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eAG14 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\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":"Professional (1\/6 PV)","offer_id":52942363099421,"sku":"OOUK-AG14-OPTICAL-TUBE-ASSEMBLY-ONLY","price":16623.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (Lambda\/10 PV)","offer_id":52942363132189,"sku":"OOUK-AG14-OPTICAL-TUBE-ASSEMBLY-ONLY-2","price":17100.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_6daa2d2f-71a9-45e6-a37b-fbc4bd3b64eb.jpg?v=1789606763"},{"product_id":"orion-optics-uk-ag16-optical-tube-assembly-only","title":"Orion Optics UK AG16 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e400mm (16\") Primary Mirror Diameter\u003c\/li\u003e\n\u003cli\u003e1520mm Focal Length at a fast f\/3.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eCorrected Flat Field Size \u0026gt;50mm\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e3\" Ceres Rack and Pinion Focuser with 10:1 Reduction\u003c\/li\u003e\n\u003cli\u003eApproximate Tube Weight of 33kg\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 AG16 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK AG16 Astrograph is an imaging instrument engineered for large-format sensors, combining a massive 400mm primary mirror with a fast f\/3.8 focal ratio. Its integrated 4-lens ED corrector delivers a flat field greater than 50mm, producing on-axis spot sizes of just 4.1µm. The entire optical system is housed in a rigid, 1320mm carbon fibre sandwich tube weighing approximately 33kg, providing the thermal stability required for consistent focus through long imaging sessions.\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 400mm f\/3.8 Optical System: A \u0026gt;50mm Flat Field Astrograph\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the AG16 is a 400mm primary mirror operating at an aggressive f\/3.8 focal ratio, designed to capture faint signal from deep-sky objects in significantly shorter exposure times. To manage this fast optical train, a computer-designed 4-lens ED corrector is permanently installed, yielding a corrected image circle greater than 50mm in diameter. This comfortably illuminates large full-frame and medium-format astronomy sensors, ensuring sharp stars across the entire frame.\u003c\/p\u003e\n\u003cp\u003eThe optical correction achieves spot sizes of just 4.1µm on-axis and 6.6µm at the edge of the field. This level of precision allows you to resolve fine details with modern, small-pixel CMOS and CCD cameras, transforming the AG16's light-gathering power into high-resolution data.\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 Fibre Construction: Thermal Stability and Active Cooling at 33kg\u003c\/h3\u003e\n\u003cp\u003eThe AG16's optical components are housed in a 450mm diameter carbon fibre sandwich tube, a material chosen for its exceptional stiffness and low coefficient of thermal expansion. This construction minimizes focus shift as ambient temperatures change during the night, a critical factor for maintaining sharpness in an f\/3.8 system. At approximately 33kg, the tube assembly remains manageable for observatory-class mounts.\u003c\/p\u003e\n\u003cp\u003eTo accelerate mirror cooling and reduce tube currents, the primary mirror cell is equipped with three controllable fans. This active cooling system allows the large 400mm mirror to reach thermal equilibrium with the surrounding air more quickly, stabilizing the image for sharp, high-contrast viewing 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\u003eImaging-Ready Mechanics: 3\" Ceres Focuser and 9-Point Mirror Cell\u003c\/h3\u003e\n\u003cp\u003eThe AG16 comes standard with the robust 3\" Ceres Rack and Pinion focuser, featuring a 10:1 reduction for fine focus control. This heavy-duty focuser is designed to carry large camera packages, filter wheels, and off-axis guiders without flexure or image shift. With 79mm of focus distance available to the image plane, you have ample room to configure a complete imaging train.\u003c\/p\u003e\n\u003cp\u003eThe 400mm primary mirror is supported by a CNC machined aluminum 9-point suspension cell. This design distributes the mirror's weight evenly, preventing gravitational sag and preserving the precise optical figure required for high-resolution imaging, regardless of the telescope's orientation.\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 AG16 Advantage: 400mm Aperture vs. Portability\u003c\/h3\u003e\n\u003cp\u003eCompared to smaller astrographs in the AG series, the AG16's primary advantage is its immense 400mm aperture. This provides a significant increase in light-gathering power and resolution over 12\" or 14\" models, allowing for deeper images with shorter sub-exposures and the ability to resolve finer details in galactic structures and planetary nebulae.\u003c\/p\u003e\n\u003cp\u003eThe trade-off for this capability is size and mass. At approximately 33kg and 1320mm in length, the AG16 demands a heavy-duty, observatory-grade mount with a substantial payload capacity. While smaller AG models offer greater portability and more modest mounting requirements, the AG16 is the choice for imagers seeking the ultimate in light collection and resolving power from a fixed installation.\u003c\/p\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through the included Professional grade and the optional Ultra (Lambda\/10 PV) upgrade, under identical conditions -- a visual illustration of the difference in contrast and fine detail the upgrade delivers.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through the Ultra (Lambda\/10 PV) grade optics upgrade\"\u003e\n\u003cp\u003eLambda\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 class of mount is required for the Orion Optics AG16 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an approximate tube weight of 33kg (73 lbs) before adding a camera, guidescope, and other accessories, the Orion Optics AG16 requires a high-capacity, observatory-class equatorial mount. For reliable imaging, you should look for mounts rated to carry at least 45-50 kg (100-110 lbs) for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the AG16's f\/3.8 focal ratio affect imaging of faint nebulae like the Cygnus Loop?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe fast \u003cstrong\u003ef\/3.8 focal ratio\u003c\/strong\u003e is a major advantage for large, faint emission nebulae like the Cygnus Loop (including NGC 6960 and NGC 6992). Compared to a slower f\/8 system, the AG16 gathers light much more rapidly, allowing you to capture deep signal in a fraction of the time. This means you can achieve a higher signal-to-noise ratio with shorter individual sub-exposures, reducing the demands on your mount's tracking accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the \u0026gt;50mm flat field on the AG16?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u0026gt;50mm corrected flat field\u003c\/strong\u003e ensures that stars remain sharp and round across very large imaging sensors, including full-frame (36x24mm) and some medium-format chips. Without this correction, stars at the corners of a large sensor would appear elongated or comatic in a fast Newtonian system. This makes the AG16 ideal for creating wide-field mosaics and imaging large targets like the Andromeda Galaxy (M31) without compromise.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the optical quality of the AG16's primary mirror?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis AG16 model is built with Orion Optics UK's hand-figured optics, guaranteed to a minimum accuracy of 1\/6 PV (Professional grade) wavefront as standard. The company is renowned for its rigorous testing using Zygo interferometers, and every mirror is supplied with its own test report. For imagers who want the tightest possible star images, an Ultra (Lambda\/10 PV) hand-figured optics upgrade is available.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the three cooling fans on the AG16 mirror cell?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe three controllable fans are part of an active cooling system for the \u003cstrong\u003e400mm primary mirror\u003c\/strong\u003e. Large mirrors have significant thermal mass and can take hours to cool to ambient temperature. The fans accelerate this process, which is critical for two reasons: it minimizes tube currents that can degrade image sharpness, and it helps prevent focus shift caused by the mirror changing shape as it cools.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use a different focuser with the AG16 instead of the included Ceres?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While the included \u003cstrong\u003e3\" Ceres focuser\u003c\/strong\u003e is a high-quality unit designed for heavy loads, Orion Optics UK can supply customized adapters for other focusers, such as the FLI Atlas. They also offer a 'FocusForm' reinforcement option to further eliminate any potential for flexure with exceptionally heavy imaging trains.\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\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1520mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/3.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon Fibre Sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1320mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\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\u003eapprox. 33kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e130mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium, 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Design\u003c\/td\u003e\n\u003ctd\u003e4-lens ED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Field Size\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (On-Axis)\u003c\/td\u003e\n\u003ctd\u003e4.1µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e6.6µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e79mm (from corrector)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Ceres Rack and Pinion with 10:1 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003e3 controllable primary mirror fans\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium cradles \u0026amp; dovetail plate\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\"\u003eAG16 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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCNC Machined Aluminium Cradles\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDovetail Plate\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":"Professional (1\/6 PV)","offer_id":52942364115229,"sku":"OOUK-AG16-OPTICAL-TUBE-ASSEMBLY-ONLY","price":19523.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (Lambda\/10 PV)","offer_id":52942364147997,"sku":"OOUK-AG16-OPTICAL-TUBE-ASSEMBLY-ONLY-2","price":20393.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_8c93370b-66bc-43d6-a5d3-dda57e7c2380.jpg?v=1789606822"},{"product_id":"orion-optics-uk-ag20-optical-tube-assembly-only","title":"Orion Optics UK AG20 Optical Tube Assembly Only","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eLargest model in the AG Astrograph range\u003c\/li\u003e\n\u003cli\u003eCarbon-fibre-sandwich tube\u003c\/li\u003e\n\u003cli\u003eCERES 3\" (76.2mm) focuser standard\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\u003eAG20 Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe AG20 is the largest model in Orion Optics UK's AG Astrograph range -- a precision computer-designed, hand-built carbon-fibre-sandwich astrograph with a wide, flat field, supplied as standard with the CERES 3\" (76.2mm) focuser.\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 Largest AG Astrograph\u003c\/h3\u003e\n\u003cp\u003eAir cooling fans are fitted as standard in the main mirror cell. Individually built to order in the UK; contact Orion Optics UK for full AG20 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\u003eAG Astrograph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eCERES 3\" (76.2mm)\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\"\u003eAG20 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":52942364705053,"sku":"OOUK-AG20-OPTICAL-TUBE-ASSEMBLY-ONLY","price":41659.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_1ffa1374-c08a-4323-a6df-a457d4cd2a5a.jpg?v=1789606871"},{"product_id":"orion-optics-uk-odk10-optical-tube-assembly","title":"Orion Optics UK ODK10 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e250mm (10\") Corrected Dall-Kirkham Optics\u003c\/li\u003e\n\u003cli\u003e1700mm Focal Length at f\/6.8\u003c\/li\u003e\n\u003cli\u003e50mm Fully Corrected Flat Image Circle\u003c\/li\u003e\n\u003cli\u003e3.5μm On-Axis Spot Size\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e3\" Crayford Focuser with 10:1 Reduction\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 ODK10 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK ODK10 is an astrograph engineered for the dedicated imager, combining a 250mm primary mirror and a fast f\/6.8 focal ratio to capture deep-sky objects with exceptional detail. Its integrated 3-lens corrector delivers a 50mm flat field, producing spot sizes as small as 3.5μm on-axis and 6.2μm at the edge of the frame. With a generous 213mm of back focus and a thermally inert carbon fibre tube, the ODK10 supports complex imaging trains and maintains stable focus across temperature changes during a long night of 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\u003eODK f\/6.8 Optical Design: 250mm Aperture and 1700mm Focal Length\u003c\/h3\u003e\n\u003cp\u003eThe heart of the ODK10 is its Corrected Dall-Kirkham optical system. This design uses a 250mm primary mirror to achieve a 1700mm focal length, striking a balance between wide-field deep-sky imaging and high-resolution planetary work. The native f\/6.8 focal ratio is significantly faster than standard Schmidt-Cassegrains, allowing you to collect more light in less time and reduce total exposure duration for faint targets.\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\u003eFull-Frame Imaging: A 50mm Flat Field with 6.2μm Edge Spots\u003c\/h3\u003e\n\u003cp\u003eUnlike conventional reflector designs that suffer from off-axis coma, the ODK10 incorporates a multi-coated 3-lens corrector to produce a natively flat 50mm image circle. This is large enough to accommodate full-frame (35mm) sensors without vignetting or distortion. The optical correction is superb, yielding tight, round stars with a spot size of just 6.2μm at the very edge of the field, ensuring your images are sharp from corner to corner.\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\u003eThermally Stable Engineering: Carbon Fibre Tube and 3 Cooling Fans\u003c\/h3\u003e\n\u003cp\u003eFocus stability is critical for long-exposure astrophotography. The ODK10 addresses this with a carbon fibre sandwich tube that exhibits virtually zero thermal expansion, preventing the focal plane from shifting as ambient temperature drops. Weighing approximately 12kg and measuring only 530mm long, the open-tube design is further enhanced by three controllable fans behind the primary mirror, ensuring rapid thermal acclimation and minimizing tube currents.\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\u003eHeavy-Duty Imaging Train: 3\" Focuser and 213mm of Back Focus\u003c\/h3\u003e\n\u003cp\u003eThe ODK10 is built to carry modern imaging loads. It features a robust 3\" Crayford focuser with a 10:1 fine reduction knob for precise focus adjustments, even with heavy equipment. An exceptionally generous 213mm of back focal distance provides ample room to install complex imaging trains, including off-axis guiders, large filter wheels, and camera rotators, without running out of focus travel.\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\u003eODK10 vs. a 10\" SCT: The Benefits of a Corrected Astrograph\u003c\/h3\u003e\n\u003cp\u003eWhile a 10\" Schmidt-Cassegrain Telescope (SCT) is a capable instrument, the ODK10 offers distinct advantages for the serious imager. The SCT's primary mirror focusing can introduce image shift, a problem eliminated by the ODK10's fixed mirror and external focuser.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNative Speed and Field:\u003c\/strong\u003e The ODK10's native f\/6.8 is faster than a typical f\/10 SCT, reducing exposure times. More importantly, its 50mm corrected flat field is built-in, whereas an SCT requires an additional, expensive reducer\/corrector to achieve a similar result.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Management:\u003c\/strong\u003e The ODK10's open tube and three cooling fans allow it to reach thermal equilibrium much faster than a closed-tube SCT, resulting in sharper images sooner.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack Focus:\u003c\/strong\u003e With 213mm of back focus, the ODK10 easily accommodates more accessories than most standard SCTs, providing greater flexibility for your imaging setup.\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 camera sensor size is the ODK10 designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Orion Optics UK ODK10 is engineered to fully illuminate a \u003cstrong\u003e50mm image circle\u003c\/strong\u003e. This makes it ideal for cameras with full-frame (36x24mm) sensors and other large-format astronomy cameras, ensuring sharp stars and no vignetting across the entire field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the ODK10's carbon fibre tube benefit astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe carbon fibre sandwich tube has a near-zero coefficient of thermal expansion. This is a critical feature for long-exposure imaging, as it prevents the telescope's focus from shifting due to temperature changes throughout the night. This thermal stability means you spend less time refocusing and more time imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 12kg weight of the ODK10 manageable for a mid-range mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. At approximately \u003cstrong\u003e12kg\u003c\/strong\u003e, the ODK10 optical tube is well within the payload capacity of mid-range equatorial mounts, such as those in the Sky-Watcher EQ6-R or Celestron CGX class, especially when used for imaging. Its short \u003cstrong\u003e530mm tube length\u003c\/strong\u003e also results in a lower moment arm, making it easier for the mount to guide accurately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 213mm back focus on the ODK10 allow me to do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe generous \u003cstrong\u003e213mm of back focus\u003c\/strong\u003e provides extensive flexibility for building your imaging train. It allows you to easily incorporate multiple accessories between the focuser and the camera, such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOff-Axis Guiders (OAGs)\u003c\/li\u003e\n\u003cli\u003eLarge filter wheels (e.g., 7-position 2\" carousels)\u003c\/li\u003e\n\u003cli\u003eAdaptive optics units\u003c\/li\u003e\n\u003cli\u003eCamera rotators\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the ODK10 perform on the Andromeda Galaxy (M31) with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ODK10 is an excellent choice for a target like the Andromeda Galaxy (M31). The \u003cstrong\u003e1700mm focal length\u003c\/strong\u003e provides enough image scale to resolve intricate dust lanes and star-forming regions in the spiral arms, while the \u003cstrong\u003e50mm flat field\u003c\/strong\u003e ensures that the entire galaxy and its satellite companions, M32 and M110, are framed with pinpoint stars from edge to edge on a full-frame sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the ODK10 for high-resolution imaging of Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While designed as a deep-sky astrograph, the \u003cstrong\u003e250mm aperture\u003c\/strong\u003e of the ODK10 provides significant resolving power for planetary imaging. When paired with a high-quality Barlow lens (e.g., 2x or 3x) and a high-frame-rate planetary camera, the \u003cstrong\u003e1700mm focal length\u003c\/strong\u003e can be effectively increased to resolve fine details like the Great Red Spot, cloud bands, and festoons on Jupiter.\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\u003eCorrected Dall-Kirkham (ODK)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e250mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1700mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Field Size\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (On-Axis)\u003c\/td\u003e\n\u003ctd\u003e3.5μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e6.2μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e213mm (from rear of mirror cell, ±1mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Crayford with 10:1 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector\u003c\/td\u003e\n\u003ctd\u003eMulti-coated 3 lens system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e96mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e530mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003eapprox. 12kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eHoneycomb CNC machined aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans (heaters optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttachment\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium dovetail with supports\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":52942364967197,"sku":"OOUK-ODK10-OPTICAL-TUBE-ASSEMBLY","price":8334.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-ODK10-Optical-Tube-Assembly-1_808c12cc-b42b-4e31-ae8d-fe1ed81ca9ac.jpg?v=1789606889"},{"product_id":"orion-optics-uk-odk12-optical-tube-assembly","title":"Orion Optics UK ODK12 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e300mm (12\") Optimised Dall-Kirkham Optics\u003c\/li\u003e\n\u003cli\u003e2040mm Focal Length at a fast f\/6.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eCovers a greater than 52mm flat imaging circle\u003c\/li\u003e\n\u003cli\u003eDelivers 1.8µm on-axis spot sizes\u003c\/li\u003e\n\u003cli\u003eGenerous 218mm of back focal distance\u003c\/li\u003e\n\u003cli\u003eThermally stable carbon fibre sandwich tube construction\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 ODK12 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK ODK12 is an astrograph engineered for large-format imaging, combining a 300mm primary mirror and a 2040mm focal length into a fast f\/6.8 system. Its integrated multi-coated 3-lens corrector produces a flat field greater than 52mm in diameter, delivering pinpoint stars with a spot size of just 1.8µm on-axis. The entire optical system is housed in a 625mm long carbon fibre sandwich tube that weighs approximately 19kg, ensuring thermal stability for critical 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\u003eODK Astrograph: 52mm Flat Field with 1.8µm Stars\u003c\/h3\u003e\n\u003cp\u003eThe Optimised Dall-Kirkham (ODK) design is built from the ground up for astrophotography. The ODK12 uses a 300mm primary mirror and a matched 120mm secondary, with a built-in 3-lens corrector group to eliminate off-axis coma and field curvature. This results in a corrected image circle larger than 52mm, capable of illuminating the largest commercially available astronomy camera sensors without vignetting or distortion.\u003c\/p\u003e\n\u003cp\u003eThe optical correction delivers incredibly tight stars across this massive field. On-axis spot sizes are a mere 1.8µm, and even at the extreme edge of the field, stars remain compact at 5.6µm. This level of correction ensures that you are capturing all the resolution the 300mm aperture can provide, making the ODK12 a premier instrument for high-resolution mosaics and large-field imaging of nebulae and galaxy clusters.\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 \u0026amp; Active Cooling at 19kg\u003c\/h3\u003e\n\u003cp\u003eTo maintain focus stability during temperature drops, the ODK12 features a carbon fibre sandwich tube. This material has virtually zero thermal expansion, preventing the 2040mm focal plane from shifting during long exposures or throughout an imaging session. The tube's open design and short 625mm length promote rapid thermal acclimation.\u003c\/p\u003e\n\u003cp\u003eThis process is accelerated by three controllable cooling fans mounted behind the honeycomb CNC-machined primary mirror cell. This active cooling system quickly brings the 300mm mirror to ambient temperature, minimizing tube currents and ensuring the sharpest possible images from the moment you begin observing. At approximately 19kg, the OTA is manageable for observatory-class mounts rated for higher payloads.\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\u003e218mm Back Focus with a 3\" Crayford Focuser\u003c\/h3\u003e\n\u003cp\u003eA critical feature for serious imagers is ample back focus, and the ODK12 provides an exceptionally long 218mm of working distance from the rear of the mirror cell. This generous space allows you to assemble a complete imaging train with any combination of accessories—including off-axis guiders, large filter wheels, rotators, and adaptive optics—without concern for reaching focus.\u003c\/p\u003e\n\u003cp\u003eFocusing is controlled by a robust 3\" Crayford focuser with a 10:1 dual-speed reduction mechanism for precise adjustments. This heavy-duty focuser is designed to carry the weight of modern large-format cameras and accessory stacks without flexure or slippage, ensuring your focal plane remains locked and perfectly orthogonal to the optical axis.\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\u003eODK12 vs. 12\" Ritchey-Chrétien: Collimation and Correction\u003c\/h3\u003e\n\u003cp\u003eThe ODK12 is often compared to Ritchey-Chrétien (RC) astrographs of similar aperture. While RCs are renowned for their corrected fields, they have a key disadvantage.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRC Advantage:\u003c\/strong\u003e Ritchey-Chrétien telescopes typically feature longer focal ratios (f\/8 or slower), which can provide more image scale for smaller targets without the need for Barlow lenses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eODK12 Advantage:\u003c\/strong\u003e The ODK is significantly easier to collimate. Unlike an RC, which requires precise alignment of both the primary and secondary mirrors, the ODK's primary mirror is fixed. Collimation is achieved by adjusting the secondary mirror only, a much simpler and more stable process. Furthermore, the ODK's 3-lens corrector is an integrated part of the design, whereas many RCs require an additional, separate corrector to achieve a fully flat field.\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 class of mount is required for the ODK12 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a tube weight of approximately \u003cstrong\u003e19kg (42 lbs)\u003c\/strong\u003e, the ODK12 requires a robust, observatory-grade equatorial mount. For imaging, you should select a mount with a payload capacity of at least 60-70 lbs to comfortably handle the OTA plus the additional weight of your camera, guider, and accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich cameras are best suited for the ODK12's 52mm image circle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ODK12's greater than \u003cstrong\u003e52mm flat field\u003c\/strong\u003e is designed for cameras with large, full-frame (36x24mm) or larger sensors. Cameras like the ZWO ASI6200, QHY600, or models with the KAF-16803 sensor will be fully illuminated, allowing you to capture vast fields of view, such as the entire Andromeda Galaxy (M31) and its companions in a single frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the ODK12's f\/6.8 focal ratio benefit deep-sky imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003ef\/6.8\u003c\/strong\u003e focal ratio is a sweet spot for deep-sky imaging. It is fast enough to collect significant signal on faint nebulae and galaxies in shorter sub-exposures compared to slower f\/8 or f\/10 systems. At the same time, its \u003cstrong\u003e2040mm focal length\u003c\/strong\u003e provides enough image scale to resolve fine details in targets like the Whirlpool Galaxy (M51) or planetary nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the ODK12's 218mm back focal distance allow me to do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e218mm back focal distance\u003c\/strong\u003e provides enormous flexibility for building your imaging train. It ensures you can fit a full stack of accessories, such as an off-axis guider, a large 3\" filter wheel, a camera rotator, and your camera, and still easily reach focus. This is a critical feature that many other astrographs lack.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs collimating the ODK12 difficult?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the ODK12 is designed for straightforward collimation. Unlike Ritchey-Chrétien designs that require careful alignment of both mirrors, the ODK's primary mirror is fixed. You only need to adjust the secondary mirror, which is a much simpler and more stable procedure, making it easier to maintain perfect optical alignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I experience focus shift with the ODK12's carbon fiber tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003ecarbon fibre sandwich\u003c\/strong\u003e tube material is specifically chosen for its near-zero coefficient of thermal expansion. This means that as the ambient temperature changes during an imaging session, the \u003cstrong\u003e625mm\u003c\/strong\u003e tube will not shrink or expand, keeping the focal plane stable and eliminating the need for constant refocusing.\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\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2040mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Field Size\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;52mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (On-Axis)\u003c\/td\u003e\n\u003ctd\u003e1.8µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e5.6µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e120mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focal Distance\u003c\/td\u003e\n\u003ctd\u003e218mm (from rear of mirror cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Crayford with 10:1 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Design\u003c\/td\u003e\n\u003ctd\u003eMulti-coated 3 lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e625mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003eapprox. 19kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eHoneycomb CNC machined aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttachment\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium dovetail with supports\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":52942365131037,"sku":"OOUK-ODK12-OPTICAL-TUBE-ASSEMBLY","price":13321.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-ODK12-Optical-Tube-Assembly-1_99c581f4-5562-4d1c-8b5f-39440e50ce50.jpg?v=1789606897"},{"product_id":"orion-optics-uk-odk14-optical-tube-assembly","title":"Orion Optics UK ODK14 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Mirror Diameter:\u003c\/strong\u003e 350mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocal Ratio:\u003c\/strong\u003e f\/6.8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrected Image Circle:\u003c\/strong\u003e \u0026gt;52mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Material:\u003c\/strong\u003e Carbon Fibre Sandwich\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack Focus:\u003c\/strong\u003e 210mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Weight:\u003c\/strong\u003e approx. 26kg\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 ODK14 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK ODK14 is an imaging instrument designed for large-format sensors, combining a 350mm primary mirror and a fast f\/6.8 focal ratio to capture deep-sky objects with exceptional detail. Its integrated three-lens corrector delivers a flat field greater than 52mm in diameter, producing round stars with a spot size of just 5.6µm at the edge of the field. The generous 210mm of back focus and a robust 3\" Crayford focuser accommodate complex imaging trains, while the 720mm carbon fiber tube maintains thermal stability across long exposures.\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\u003eA 350mm f\/6.8 Astrograph with a \u0026gt;52mm Flat Field\u003c\/h3\u003e\n\u003cp\u003eThe core of the ODK14 is its Optimized Dall-Kirkham optical design, engineered specifically for astrophotography. The 350mm primary mirror gathers significant light, while the 2380mm focal length provides the image scale needed for high-resolution views of galaxies and nebulae. Unlike standard reflectors, the ODK14 incorporates a permanent three-lens corrector, which creates a diffraction-limited, color-corrected field of over 52mm—large enough to serve medium-format CCDs and full-frame CMOS sensors without vignetting or distortion.\u003c\/p\u003e\n\u003cp\u003eThis optical correction results in remarkably tight stars across the entire frame. On-axis, stars are focused to a spot size of just 2.1µm, expanding to only 5.6µm at the extreme edge of the field. This ensures that whether you are imaging the core of the Hercules Cluster (M13) or the faint outer arms of the Triangulum Galaxy (M33), every star is a pinpoint.\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\u003e400mm Carbon Sandwich Tube and CNC Cell\u003c\/h3\u003e\n\u003cp\u003eTo maintain optical precision, the ODK14 is built around a carbon fiber sandwich tube with a 400mm diameter. This material provides extreme rigidity at a manageable weight of approximately 26kg and, more importantly, has a near-zero coefficient of thermal expansion. This prevents the 2380mm focal plane from shifting as temperatures drop overnight, eliminating the need for constant refocusing during an imaging session.\u003c\/p\u003e\n\u003cp\u003eThe 350mm primary mirror is supported by a honeycomb, CNC-machined aluminum cell that prevents flexure at any orientation. To achieve rapid thermal equilibrium, three controllable fans are positioned behind the mirror cell, quickly cooling the primary mirror to ambient temperature for sharp, stable views. This open-tube design cools down significantly faster than a comparable closed-tube Schmidt-Cassegrain.\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\u003e210mm of Back Focus and a 3\" Crayford Focuser\u003c\/h3\u003e\n\u003cp\u003eThe ODK14 is designed to integrate seamlessly into a modern imaging setup. It provides a massive 210mm of back focal distance, measured from the rear of the mirror cell. This generous spacing allows you to easily install any combination of accessories in the optical train, including off-axis guiders, large filter wheels, rotators, and adaptive optics units, without concern for reaching focus.\u003c\/p\u003e\n\u003cp\u003eFocusing is controlled by a heavy-duty 3\" Crayford focuser with a 10:1 reduction for precise fine adjustments. This focuser is capable of supporting heavy, large-format camera packages without slipping or tilting, ensuring the sensor remains perfectly orthogonal to the light path. The entire assembly is mounted using a CNC-machined aluminum dovetail system for a secure connection to your equatorial mount.\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\u003eODK14 vs. Ritchey-Chrétien: Corrected Field and Collimation\u003c\/h3\u003e\n\u003cp\u003eThe primary competitor for an astrograph like the ODK14 is a traditional Ritchey-Chrétien (RC) telescope. While RCs are known for their coma-free fields, they typically require a separate, costly field flattener to correct for significant off-axis astigmatism and produce a truly flat field for imaging.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Correction:\u003c\/strong\u003e The ODK14's built-in three-lens corrector delivers a flat, \u0026gt;52mm corrected field out of the box. An RC of similar aperture often requires an additional corrector, adding complexity and cost to the imaging train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpot Size:\u003c\/strong\u003e Thanks to its corrective elements, the ODK14 maintains tight, round stars to the edge of the field, with a specified spot size of only 5.6µm. This is often superior to what an RC with a generic flattener can achieve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollimation:\u003c\/strong\u003e Ritchey-Chrétien telescopes are notoriously sensitive to collimation, requiring precise alignment of both the primary and secondary hyperbolic mirrors. The ODK design is generally more forgiving to align, allowing you to spend more time imaging and less time adjusting optics.\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 kind of mount is required for the ODK14 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a tube weight of approximately \u003cstrong\u003e26kg (57 lbs)\u003c\/strong\u003e, the ODK14 requires a high-capacity equatorial mount. For reliable imaging, you should choose a mount with a rated instrument capacity of at least 40kg (90 lbs) to comfortably handle the OTA plus a full imaging train. Mounts in the class of a 10Micron GM2000, Software Bisque Paramount ME II, or Astro-Physics 1100GTO are appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the ODK14's 2380mm focal length perform on small galaxies like the Whirlpool Galaxy (M51)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 2380mm focal length is ideal for targets like M51, especially when paired with modern CMOS cameras with small pixels (e.g., 2.9µm to 3.76µm). The combination provides an excellent image scale for resolving fine details like individual HII regions, dust lanes, and the tidal bridge connecting M51 to its companion galaxy, NGC 5195.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the ODK14's 210mm back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e210mm back focus\u003c\/strong\u003e distance provides ample room to install a complete, modern imaging train. This allows you to use accessories such as an off-axis guider (OAG), a large-format filter wheel (for LRGB and narrowband filters), an electronic rotator, and your primary imaging camera without running out of focus travel. It eliminates the need for extenders and ensures maximum flexibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the ODK14 use a carbon fiber tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA carbon fiber sandwich tube offers two key advantages for high-resolution imaging. First, it has a \u003cstrong\u003enear-zero coefficient of thermal expansion\u003c\/strong\u003e, which prevents the telescope's focus from shifting as the ambient temperature changes during the night. Second, it has a very high stiffness-to-weight ratio, ensuring the optical elements remain perfectly aligned regardless of the telescope's orientation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the ODK14 be used for planetary imaging of Jupiter or Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The large \u003cstrong\u003e350mm aperture\u003c\/strong\u003e provides incredible resolving power, capable of revealing fine details in Jupiter's cloud bands, the Great Red Spot, and the Cassini Division in Saturn's rings. While the native f\/6.8 focal ratio is fast for planetary work, adding a 2.5x or 3x Barlow lens will increase the effective focal length to an ideal range for high-frame-rate planetary cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the \u0026gt;52mm corrected field of the ODK14 mean for my camera choice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u0026gt;52mm fully corrected image circle\u003c\/strong\u003e means the ODK14 can illuminate and provide sharp, pinpoint stars across the largest commercially available astronomy sensors. This includes:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-Frame Sensors:\u003c\/strong\u003e (e.g., Sony IMX571, IMX455) which have a diagonal of ~43mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium-Format Sensors:\u003c\/strong\u003e (e.g., KAF-16803) which have a diagonal of 52.1mm.\u003c\/li\u003e\n\u003c\/ul\u003e\nYou can use any of these large sensors without worrying about vignetting or distorted stars in the corners of your images.\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\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2380mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Field Size\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;52mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (On-Axis)\u003c\/td\u003e\n\u003ctd\u003e2.1µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e5.6µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Design\u003c\/td\u003e\n\u003ctd\u003eMulti-coated 3 lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e210mm (from rear of mirror cell, ±1mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Crayford with 10:1 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e720mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003eapprox. 26kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e136mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eHoneycomb CNC machined aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror \u0026amp; Tube Cooling\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans (heaters optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttachment Method\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium dovetail with supports\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\"\u003eODK14 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":52942365425949,"sku":"OOUK-ODK14-OPTICAL-TUBE-ASSEMBLY","price":18116.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-ODK14-Optical-Tube-Assembly-1_dab33d06-5f04-4966-84bc-ef40b7061d52.jpg?v=1789606905"},{"product_id":"orion-optics-uk-odk16-optical-tube-assembly","title":"Orion Optics UK ODK16 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e400mm (16\") Primary Mirror Diameter\u003c\/li\u003e\n\u003cli\u003e2720mm Focal Length at f\/6.8\u003c\/li\u003e\n\u003cli\u003eCorrected Dall-Kirkham Optical Design\u003c\/li\u003e\n\u003cli\u003e\u0026gt;52mm Flat Field Image Circle\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e216mm of Back Focal Distance\u003c\/li\u003e\n\u003cli\u003e3\" Crayford Focuser with 10:1 Reduction\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\u003eDownloads\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 ODK16 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK ODK16 combines a massive 400mm primary mirror with a fast f\/6.8 focal ratio to create a formidable deep-sky imaging platform. Its integrated 3-lens corrector delivers a fully flat field greater than 52mm in diameter, producing pinpoint stars from a 2.4µm on-axis spot size out to just 6.0µm at the edge of the field. With a focal length of 2720mm and a thermally stable carbon fibre tube, the ODK16 is engineered to resolve fine detail on distant galaxies and planetary surfaces with professional-grade optical accuracy.\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\u003e400mm f\/6.8 Optics: A \u0026gt;52mm Flat Field for Large Format Sensors\u003c\/h3\u003e\n\u003cp\u003eThe heart of the ODK16 is its corrected Dall-Kirkham optical system. The 400mm primary mirror gathers immense light, while the f\/6.8 focal ratio allows for shorter exposure times on faint nebulae compared to slower designs. A factory-matched, multi-coated 3-lens corrector is permanently integrated into the optical path, eliminating the need for third-party flatteners and ensuring the system performs to its full potential.\u003c\/p\u003e\n\u003cp\u003eThis design produces a corrected image circle greater than 52mm, fully illuminating the largest full-frame CMOS and CCD sensors without vignetting or field curvature. With spot sizes as small as 2.4µm, you can leverage the resolution of modern high-pixel-density cameras to capture incredibly sharp, detailed images across the entire frame.\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\u003eZero-Expansion Carbon Tube: Thermal Stability Across a 835mm Tube\u003c\/h3\u003e\n\u003cp\u003eTo maintain precise focus during temperature drops, the ODK16's 835mm tube is constructed from a carbon fibre sandwich material. This advanced composite has virtually zero thermal expansion, preventing the focal plane from shifting during long imaging sessions or throughout the night. The result is consistently sharp stars without the need for constant refocusing.\u003c\/p\u003e\n\u003cp\u003eThe open-tube design, combined with three controllable fans behind the honeycomb CNC-machined primary mirror cell, ensures rapid thermal acclimation. This active cooling system quickly brings the 400mm mirror to ambient temperature, minimizing tube currents and delivering stable, high-contrast views sooner.\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\u003eImaging Integration: 216mm of Back Focus and a 3\" Crayford\u003c\/h3\u003e\n\u003cp\u003eThe ODK16 is built from the ground up for serious astrophotography. It provides a generous 216mm of back focal distance measured from the rear of the mirror cell, offering ample room for complex imaging trains. You can easily accommodate off-axis guiders, large filter wheels, rotators, and adaptive optics systems without concern for reaching focus.\u003c\/p\u003e\n\u003cp\u003eFocusing is managed by a robust 3\" Crayford focuser, featuring 10:1 fine reduction for critical adjustments. This large-aperture focuser provides a rigid, flexure-free connection point for heavy camera packages, ensuring the optical axis remains perfectly aligned throughout your exposure.\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\u003eODK16 vs. Ritchey-Chrétien: The Advantage of an Integrated Corrector\u003c\/h3\u003e\n\u003cp\u003eWhile Ritchey-Chrétien (RC) telescopes are known for their coma-free fields, they typically operate at f\/8 or slower and require a separate, often expensive, field flattener or reducer to produce sharp stars on large sensors. The ODK16's primary advantage is its fully integrated, optimized optical system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in Correction:\u003c\/strong\u003e The ODK16's 3-lens corrector is designed as part of the optical train, not an add-on. This guarantees a \u0026gt;52mm flat field out of the box, with performance optimized for its native f\/6.8 focal ratio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFaster Imaging:\u003c\/strong\u003e At f\/6.8, the ODK16 requires significantly less exposure time to reach the same signal-to-noise ratio as a comparable f\/8 RC, allowing you to gather more data in a single night.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Spacing guesswork:\u003c\/strong\u003e With an integrated corrector, you avoid the trial-and-error of finding the perfect corrector-to-sensor spacing that is often required with third-party accessories on an RC.\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 camera sensors can the ODK16's \u0026gt;52mm image circle cover?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ODK16's image circle of over 52mm is large enough to fully illuminate and correct for full-frame sensors (36x24mm, 43mm diagonal) and even larger medium-format sensors. This makes it an ideal match for popular full-frame astronomy cameras, ensuring you have pinpoint stars and no vignetting across the entire field.\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 ODK16's 36kg weight?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an approximate tube weight of 36kg, plus the added weight of a large camera, guider, and accessories, the ODK16 requires a high-capacity equatorial mount. You should look for a mount in the 100 lb (45 kg) payload class or higher to ensure stable, precise tracking for long-exposure astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the ODK16's carbon fibre tube benefit imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe carbon fibre sandwich construction has a near-zero coefficient of thermal expansion. As temperatures change overnight, a metal tube will shrink, causing the focal point to shift and requiring you to refocus. The ODK16's tube holds focus rigidly, keeping your images sharp throughout long automated imaging sequences.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 216mm back focus on the ODK16 allow me to install?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 216mm of back focus is extremely generous and provides ample space for a complete imaging train. You can easily fit components such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAn off-axis guider (OAG)\u003c\/li\u003e\n\u003cli\u003eA large-format filter wheel (e.g., 5-position or 7-position 2\")\u003c\/li\u003e\n\u003cli\u003eAn electronic rotator\u003c\/li\u003e\n\u003cli\u003eAn adaptive optics unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the ODK16 perform on small targets like the Dumbbell Nebula (M27)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a 2720mm focal length, the ODK16 provides significant image scale, making it perfect for resolving detail in smaller deep-sky objects. M27 and other planetary nebulae or smaller galaxies will be framed beautifully, allowing you to capture intricate structural details that are inaccessible to shorter focal length instruments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ODK16's f\/6.8 focal ratio a good compromise for different targets?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, f\/6.8 is an excellent \"all-around\" focal ratio for a large imaging instrument. It is fast enough to capture faint, extended objects like the Veil Nebula (NGC 6960) in reasonable time, while the 2720mm focal length still provides the high resolution needed for detailed views of Jupiter's cloud bands or Saturn's rings.\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\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2720mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focal Distance\u003c\/td\u003e\n\u003ctd\u003e216mm (from rear of mirror cell, ±1mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003eapprox. 36kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e835mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e450mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e152mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Design\u003c\/td\u003e\n\u003ctd\u003eMulti-coated 3 lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Flat Field\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;52mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (On-Axis)\u003c\/td\u003e\n\u003ctd\u003e2.4µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e6.0µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Crayford with 10:1 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eHoneycomb CNC machined aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttachment Method\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium dovetail with supports\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\"\u003eODK16 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\u003cp\u003eNo product-specific manual or software is available for the Orion Optics UK ODK16 Optical Tube Assembly at this time.\u003c\/p\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":52942365524253,"sku":"OOUK-ODK16-OPTICAL-TUBE-ASSEMBLY","price":25212.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_dfa4a989-71b5-41e6-9a89-14f8b8b82677.jpg?v=1789606914"},{"product_id":"orion-optics-uk-odk10tr-optical-tube-assembly","title":"Orion Optics UK ODK10Tr Truss Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e250mm (10-inch) Optimized Dall-Kirkham optics\u003c\/li\u003e\n\u003cli\u003e1700mm focal length at a native f\/6.8 focal ratio\u003c\/li\u003e\n\u003cli\u003e50mm fully corrected, flat image circle for large sensors\u003c\/li\u003e\n\u003cli\u003e3.5μm on-axis spot size for sharp stars\u003c\/li\u003e\n\u003cli\u003eCarbon fiber truss tube construction weighing only 12kg\u003c\/li\u003e\n\u003cli\u003e3-inch Crayford focuser with 10:1 fine focus control\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 ODK10Tr Truss Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK ODK10Tr is an imaging instrument designed for uncompromising optical clarity, delivering a 50mm flat field from its 250mm f\/6.8 corrected Dall-Kirkham optics. With a focal length of 1700mm, it achieves pinpoint stars measuring just 3.5μm on-axis and 6.2μm at the edge of the field, ensuring full use of modern high-resolution sensors. Its carbon fiber truss construction keeps the weight to approximately 12kg, providing exceptional rigidity and thermal stability for serious astrophotography.\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\u003eCorrected Dall-Kirkham: 50mm Flat Field with 3.5μm Spot Sizes\u003c\/h3\u003e\n\u003cp\u003eThe heart of the ODK10Tr is its optical system, which pairs an elliptical primary mirror with a spherical secondary and a dedicated 3-lens corrector. This design produces a 50mm diameter, fully illuminated and corrected image circle, free of coma and field curvature. You can confidently use full-frame (35mm format) sensors and even larger medium-format chips without vignetting or distorted stars at the corners.\u003c\/p\u003e\n\u003cp\u003eThe optical correction delivers incredibly tight star images, with a measured spot size of only 3.5μm at the center of the field and 6.2μm at the very edge. This level of correction ensures that the telescope's resolution, not the optics, is the limiting factor, resolving fine detail in galaxies and nebulae even with small-pixel CMOS cameras.\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 Truss: 12kg of Rigid, Stable Construction\u003c\/h3\u003e\n\u003cp\u003eThe ODK10Tr's open truss structure, built from a carbon fiber sandwich material, provides a superior stiffness-to-weight ratio. At just 12kg, this 10-inch astrograph is manageable for a wide range of equatorial mounts while remaining exceptionally rigid to prevent flexure as it moves across the sky. Carbon fiber's low thermal expansion coefficient also ensures the 1700mm focal length remains stable during temperature drops, minimizing focus shift throughout an imaging session.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive Cooling:\u003c\/strong\u003e Three integrated, controllable fans are mounted behind the primary mirror to accelerate thermal acclimation, allowing you to start imaging faster.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Machined Components:\u003c\/strong\u003e Key mechanical parts, including the honeycomb mirror cell and dovetail plate supports, are CNC machined from aluminum for precise, repeatable alignment and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStray Light Control:\u003c\/strong\u003e While the open truss design promotes rapid cooling, it is susceptible to stray light. Using a simple fabric shroud (not included) is recommended to maximize image contrast, especially from light-polluted locations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging-Ready Mechanics: 3\" Focuser and 213mm Back Focus\u003c\/h3\u003e\n\u003cp\u003eEngineered for demanding imaging setups, the ODK10Tr features a robust 3\" Crayford focuser with a 10:1 reduction ratio for precise fine adjustments. The large-diameter drawtube eliminates vignetting with large sensors and can support heavy camera packages without slipping or tilting. With a generous 213mm of back focus measured from the rear of the mirror cell, you have ample room to install complex imaging trains, including off-axis guiders, large filter wheels, and camera rotators, without concern for reaching focus.\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\u003eODK10Tr vs. Ritchey-Chrétien: Collimation, Field Correction, and Spot Size\u003c\/h3\u003e\n\u003cp\u003eFor imagers seeking a flat-field instrument, the main alternative to an ODK is a Ritchey-Chrétien (RC). While both are excellent designs, the ODK presents several practical advantages.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompetitor's Advantage (RC):\u003c\/strong\u003e A pure RC design is naturally free from coma, an optical aberration that elongates stars away from the center. However, it suffers from significant astigmatism and field curvature, requiring a separate corrector for serious imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eODK10Tr Advantage:\u003c\/strong\u003e The ODK's integrated 3-lens corrector fully addresses coma, astigmatism, and field curvature across its 50mm image circle. More importantly, the ODK's spherical secondary mirror makes collimation far more forgiving than the hyperbolic secondary of an RC, which requires extremely precise alignment. For most users, the ODK delivers superior edge-of-field star shapes and is significantly easier to maintain in perfect adjustment.\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 sensors are a good match for the ODK10Tr's 50mm image circle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 50mm fully corrected image circle is ideal for full-frame sensors (e.g., Sony IMX455, IMX571 in APS-C format) and even some medium-format CCD or CMOS chips. You can use any sensor up to a 50mm diagonal without experiencing significant vignetting or distorted stars at the corners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the 213mm of back focus on the ODK10Tr?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e213mm back focus\u003c\/strong\u003e is measured from the rear plate of the mirror cell. You will need to use extension tubes between the focuser and your camera to place the sensor at the correct focal plane. This generous distance ensures you can fit any combination of accessories like an off-axis guider, filter wheel, and adaptive optics unit into your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow difficult is it to collimate the ODK10Tr compared to an RC?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ODK10Tr is significantly easier to collimate. Its spherical secondary mirror is much less sensitive to tilt errors than the hyperbolic secondary of a Ritchey-Chrétien. This makes achieving and maintaining perfect optical alignment a much simpler process, which is a major practical advantage for field use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a shroud for the ODK10Tr's truss design?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile not strictly required, a light shroud is highly recommended. The open truss design is excellent for thermal management but can allow stray light to hit the focal plane, reducing contrast. A shroud also helps protect the mirrors from dew and dust. It is an essential accessory for getting the best possible performance from the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the ODK10Tr perform on a large target like the Andromeda Galaxy (M31) with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ODK10Tr is exceptionally well-suited for this scenario. Its 1700mm focal length provides the ideal image scale for capturing detail in the galaxy's dust lanes and core, while the 50mm flat image circle allows a full-frame sensor to capture the full expanse of M31 in a single frame with sharp stars from edge to edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ODK10Tr's f\/6.8 focal ratio suitable for imaging smaller planetary nebulae like the Ring Nebula (M57)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003ef\/6.8 focal ratio\u003c\/strong\u003e and \u003cstrong\u003e1700mm focal length\u003c\/strong\u003e provide excellent image scale for resolving details in smaller targets like the Ring Nebula (M57) or the Dumbbell Nebula (M27). The high optical quality and small spot sizes will allow you to capture fine structural details within these objects, especially when paired with a camera that has small pixels.\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\u003eOptimized Dall-Kirkham (ODK) with 3-Lens Corrector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e250mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1700mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Field Size\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (On-Axis)\u003c\/td\u003e\n\u003ctd\u003e3.5μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e6.2μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e96mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e213mm (from rear of mirror cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Crayford with 10:1 Reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon Fibre Sandwich Truss\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e475mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003eapprox. 12kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eHoneycomb CNC Machined Aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttachment\u003c\/td\u003e\n\u003ctd\u003eCNC Machined Aluminium Dovetail Plate\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\"\u003eODK10Tr Truss 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":52942365688093,"sku":"OOUK-ODK10TR-OPTICAL-TUBE-ASSEMBLY","price":11316.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_e23803b0-3de1-43d0-a3a8-278a610b3ea1.jpg?v=1789606922"},{"product_id":"orion-optics-uk-odk12tr-optical-tube-assembly","title":"Orion Optics UK ODK12Tr Truss Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e300mm (12\") Optimized Dall-Kirkham Astrograph\u003c\/li\u003e\n\u003cli\u003e2040mm Focal Length (f\/6.8)\u003c\/li\u003e\n\u003cli\u003e\u0026gt;52mm Flat, Corrected Image Circle\u003c\/li\u003e\n\u003cli\u003e1.8µm On-Axis Spot Size\u003c\/li\u003e\n\u003cli\u003eCarbon Fiber Truss Tube Construction\u003c\/li\u003e\n\u003cli\u003e218mm of Back Focus\u003c\/li\u003e\n\u003cli\u003e3\" Crayford Focuser with 10:1 Reduction\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 ODK12Tr Truss Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK ODK12Tr Truss is a dedicated imaging platform built around a 300mm primary mirror with a 2040mm focal length. Its f\/6.8 corrected Dall-Kirkham design delivers incredibly small 1.8µm spot sizes on-axis and maintains a flat field greater than 52mm in diameter. The entire carbon fiber truss assembly weighs approximately 19kg and provides a generous 218mm of back focal distance for complex accessory stacks.\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\u003e300mm f\/6.8 Optics: 5.6µm Spots Across a \u0026gt;52mm Field\u003c\/h3\u003e\n\u003cp\u003eThe ODK12Tr's optical system is engineered for large-format sensors. The 300mm primary mirror operates at f\/6.8, providing enough image scale for detailed views of distant galaxies without demanding excessively long exposure times. A built-in, multi-coated 3-lens corrector flattens the field, delivering pinpoint stars with a spot size of just 5.6µm at the edge of a massive 52mm image circle—fully illuminating full-frame and larger sensors.\u003c\/p\u003e\n\u003cp\u003eThe 120mm secondary mirror provides this wide-field illumination, creating a 40% central obstruction by diameter. This is a necessary trade-off for edge-to-edge performance on large chips and has minimal impact on deep-sky imaging, where light grasp and field flatness are paramount.\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 Truss: A 19kg Platform for Stable Imaging\u003c\/h3\u003e\n\u003cp\u003eConstructed from a carbon fiber sandwich material, the ODK12Tr's open truss frame offers exceptional thermal and mechanical stability. Weighing approximately 19kg, the tube assembly is rigid enough to support heavy imaging loads without flexure. The carbon fiber's near-zero coefficient of thermal expansion means the 2040mm focal length remains constant as temperatures drop, preventing focus shift during long imaging sessions.\u003c\/p\u003e\n\u003cp\u003eThe open truss design allows the 300mm primary mirror to acclimate to ambient temperatures quickly, aided by three controllable fans integrated into the honeycomb CNC-machined mirror cell. This active thermal management ensures your images are sharp from the start of the night to the end.\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\u003e218mm Back Focus \u0026amp; 3\" Focuser: Ready for Any Imaging Train\u003c\/h3\u003e\n\u003cp\u003eThe ODK12Tr is designed to accommodate any modern imaging accessory. It provides 218mm of back focal distance measured from the rear of the mirror cell, offering ample room for off-axis guiders, filter wheels, rotators, and large-format cameras. You won't need to compromise on your ideal setup due to spacing constraints.\u003c\/p\u003e\n\u003cp\u003eTo carry this load, the OTA is equipped with a robust 3\" Crayford focuser featuring a 10:1 reduction for precise, repeatable fine adjustments. The large drawtube diameter prevents vignetting with large sensors and ensures your entire imaging train is held securely throughout the night.\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\u003eODK12Tr vs. Ritchey-Chrétien: Collimation and Field Correction\u003c\/h3\u003e\n\u003cp\u003eUnlike Ritchey-Chrétien (RC) telescopes that use two difficult-to-align hyperbolic mirrors, the Optimized Dall-Kirkham (ODK) design employs an elliptical primary and a spherical secondary. This makes collimation significantly more forgiving and stable, saving valuable clear-sky time.\u003c\/p\u003e\n\u003cp\u003eWhile a classic Dall-Kirkham suffers from off-axis coma, the ODK12Tr's integrated 3-lens corrector completely eliminates it, producing a wide, flat, coma-free field that rivals the best RCs. The result is an astrograph that combines the optical simplicity and collimation stability of the DK design with the professional, wide-field imaging results of a corrected RC.\u003c\/p\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 sensor size can the ODK12Tr fully illuminate and correct?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ODK12Tr provides a fully corrected, flat field size of \u003cstrong\u003eover 52mm in diameter\u003c\/strong\u003e. This is large enough to cover full-frame (36x24mm) and even larger format astronomy sensors without significant vignetting or distortion at the corners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the ODK12Tr's carbon fiber truss help with astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe carbon fiber construction offers two key benefits. First, it has an extremely low coefficient of thermal expansion, which means the telescope's \u003cstrong\u003e2040mm focal length does not change\u003c\/strong\u003e as temperatures drop overnight, preventing focus shift. Second, the open truss design allows the primary mirror to cool down to ambient temperature much faster, aided by the \u003cstrong\u003ethree integrated cooling fans\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the ODK12Tr perform on a large target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ODK12Tr is an excellent choice for M31. Its \u003cstrong\u003e2040mm focal length\u003c\/strong\u003e and \u003cstrong\u003e300mm aperture\u003c\/strong\u003e provide the necessary resolution to capture fine dust lanes and star-forming regions within the galaxy's spiral arms. The \u003cstrong\u003e\u0026gt;52mm corrected field\u003c\/strong\u003e allows you to frame a significant portion of the galaxy and its companions in a single shot with a large-format camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the ODK12Tr's 218mm of back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e218mm of back focus\u003c\/strong\u003e is exceptionally generous and provides critical flexibility for building your imaging train. It ensures you have enough space to install multiple accessories—such as an off-axis guider, a filter wheel, an adaptive optics unit, and a rotator—between the focuser and the camera sensor without running out of focus travel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ODK12Tr's f\/6.8 focal ratio good for imaging smaller targets like the Ring Nebula (M57)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the f\/6.8 focal ratio is a versatile sweet spot. For a target like M57, the \u003cstrong\u003e2040mm focal length\u003c\/strong\u003e yields a large enough image scale to clearly resolve the nebula's ring structure and the faint central star. The focal ratio is still fast enough to capture significant signal in reasonable sub-exposure times, making it efficient for both broadband and narrowband imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose the ODK12Tr over a comparable Ritchey-Chrétien astrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage of the ODK12Tr is its ease of collimation. Ritchey-Chrétien designs use two hyperbolic mirrors that are notoriously difficult to align perfectly. The ODK's elliptical primary and spherical secondary are far more tolerant, holding collimation better and being easier to adjust. With its integrated corrector, the ODK provides the flat, coma-free field of an RC without the collimation challenges.\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\u003eOptimized Dall-Kirkham (Corrected)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2040mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Field Size\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;52mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (On-Axis)\u003c\/td\u003e\n\u003ctd\u003e1.8µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e5.6µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e120mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Crayford with 10:1 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e218mm (from rear of mirror cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e615mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003eapprox. 19kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eHoneycomb CNC machined aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttachment\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium dovetail plate\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":52942365786397,"sku":"OOUK-ODK12TR-OPTICAL-TUBE-ASSEMBLY","price":16006.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_4e6790da-dd7f-4ac3-a55a-cf0778c4f563.jpg?v=1789606931"},{"product_id":"orion-optics-uk-odk14tr-optical-tube-assembly","title":"Orion Optics UK ODK14Tr Truss Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e350mm (14\") Optimized Dall-Kirkham Optics\u003c\/li\u003e\n\u003cli\u003e2380mm Focal Length (f\/6.8)\u003c\/li\u003e\n\u003cli\u003e\u0026gt;52mm Fully Illuminated and Corrected Image Circle\u003c\/li\u003e\n\u003cli\u003e2.1µm On-Axis Spot Size\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Truss Tube Construction\u003c\/li\u003e\n\u003cli\u003e210mm of Back Focus\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 ODK14Tr Truss Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK ODK14Tr is an astrograph engineered for large-format imaging, combining a 350mm primary mirror with a fast f\/6.8 focal ratio to deliver a 2380mm focal length ideal for detailed views of deep-sky objects. Its Optimized Dall-Kirkham design employs a multi-coated 3-lens corrector to produce a flat field greater than 52mm in diameter, achieving pinpoint stars with spot sizes as small as 2.1μm on-axis. The open carbon fibre truss structure weighs approximately 26kg and is built for thermal stability, supported by three controllable fans for rapid mirror cooling.\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\u003eODK Optics: A 350mm f\/6.8 System with a \u0026gt;52mm Corrected Field\u003c\/h3\u003e\n\u003cp\u003eThe heart of the ODK14Tr is its Optimized Dall-Kirkham optical system, which pairs an ellipsoidal primary mirror with a spherical secondary. This configuration is inherently easier to figure to a high degree of smoothness than more complex aspheric designs. The system's native coma is fully addressed by a dedicated, multi-coated 3-lens corrector, resulting in a diffraction-limited, flat field across a massive \u0026gt;52mm image circle.\u003c\/p\u003e\n\u003cp\u003eThis optical design delivers incredibly sharp stars, with a measured spot size of just 2.1μm on-axis and 5.6μm at the edge of the field. This ensures that the telescope's resolution is not the limiting factor, even when paired with modern CMOS cameras that have very small pixels. The 350mm aperture gathers significant light, while the f\/6.8 focal ratio provides a balance of image scale and exposure speed suitable for imaging everything from distant galaxy clusters to faint nebulae.\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\u003eTruss Structure: Carbon Fibre Sandwich Construction at 26kg\u003c\/h3\u003e\n\u003cp\u003eThe ODK14Tr utilizes an open truss framework made from a carbon fibre sandwich material, a design choice that offers superior thermal performance and rigidity. Unlike a solid tube, the open design prevents the formation of tube currents and allows the optics to acclimate to ambient temperatures quickly. The carbon fibre construction minimizes focus shift caused by temperature changes, a critical factor for maintaining sharpness over long imaging sessions.\u003c\/p\u003e\n\u003cp\u003eDespite its large 400mm tube diameter, the OTA weighs approximately 26kg and has a compact length of 700mm, making it manageable for high-capacity observatory-class mounts. The primary mirror is housed in a honeycomb CNC machined aluminum cell, providing rigid support without inducing mechanical stress on the optics.\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\u003eThermal Control: Active Cooling with 3 Controllable Fans\u003c\/h3\u003e\n\u003cp\u003eAchieving thermal equilibrium is essential for high-resolution imaging, and the ODK14Tr addresses this directly with an integrated active cooling system. Three controllable fans are positioned behind the primary mirror to accelerate the cooling process, drawing air across the back of the 350mm mirror to bring it to ambient temperature rapidly.\u003c\/p\u003e\n\u003cp\u003eBy minimizing the temperature differential between the glass and the surrounding air, this system drastically reduces mirror seeing—the localized turbulence that can soften fine details. This allows you to start imaging sooner and maintain optimal optical performance throughout the night. For observers in dew-prone locations, optional heaters can be integrated for complete environmental control.\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\u003eImaging Train Support: 210mm Back Focus and a 3\" Crayford Focuser\u003c\/h3\u003e\n\u003cp\u003eThe ODK14Tr is designed to accommodate complex and heavy imaging trains. It provides a generous 210mm of back focus, measured from the rear of the mirror cell. This extensive travel leaves ample room for accessories like off-axis guiders, large filter wheels, rotators, and large-format cameras without concern for reaching focus.\u003c\/p\u003e\n\u003cp\u003eFocusing is handled by a robust 3\" Crayford focuser with a 10:1 reduction ratio. The large diameter prevents vignetting on full-frame and larger sensors, while the fine-focus knob allows for the precise adjustments necessary to achieve critical focus at the 2380mm focal length. The entire assembly attaches to your mount via a sturdy, CNC-machined aluminum dovetail plate with integrated supports for maximum stability.\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\u003eODK14Tr vs. CDK Designs: Understanding Astrograph Trade-Offs\u003c\/h3\u003e\n\u003cp\u003eWhen choosing a high-end astrograph, the Orion Optics UK Optimized Dall-Kirkham (ODK) is often compared to Corrected Dall-Kirkham (CDK) designs. Both aim for a large, flat, coma-free field, but they achieve it through different optical philosophies.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eODK Approach:\u003c\/strong\u003e The ODK uses an ellipsoidal primary and a spherical secondary. A spherical surface is the simplest to manufacture to an extremely high degree of smoothness, minimizing scatter. The significant off-axis coma inherent in this design is then eliminated with a dedicated 3-lens corrector placed before the focal plane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCDK Approach:\u003c\/strong\u003e A CDK typically uses an ellipsoidal primary and an aspheric (hyperbolic) secondary, along with a corrector. The aspheric secondary corrects for coma natively, reducing the workload of the corrector lenses. The trade-off is the increased complexity and cost of figuring the aspheric secondary surface.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe ODK14Tr's design represents a pragmatic choice, prioritizing the manufacturability of its core components to achieve exceptional surface quality while using a powerful, modern corrector to deliver a final image that is sharp and flat across its \u0026gt;52mm field.\u003c\/p\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 kind of mount is required for the ODK14Tr OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an approximate weight of \u003cstrong\u003e26kg\u003c\/strong\u003e for the optical tube alone, plus the added weight of a large camera, filter wheel, and guider, a heavy-duty, observatory-class mount is required. Look for a German equatorial mount with a stated instrument capacity of at least 50kg (110 lbs) to ensure stable, accurate tracking for long-exposure astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the ODK14Tr perform on a large target like the Andromeda Galaxy (M31) with a full-frame sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ODK14Tr is an excellent instrument for such a target. Its \u003cstrong\u003e\u0026gt;52mm corrected image circle\u003c\/strong\u003e fully illuminates a standard full-frame sensor (43mm diagonal) with no vignetting. The \u003cstrong\u003e2380mm focal length\u003c\/strong\u003e provides enough image scale to resolve individual dust lanes, star-forming regions, and globular clusters within M31, while still being wide enough to capture a significant portion of the galaxy's sprawling disk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 210mm back focus of the ODK14Tr allow me to do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e210mm of back focus\u003c\/strong\u003e provides exceptional flexibility for building a comprehensive imaging train. It allows you to easily incorporate multiple accessories between the focuser and the camera sensor, such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAn off-axis guider (OAG)\u003c\/li\u003e\n\u003cli\u003eA large-format filter wheel (e.g., 5- or 7-position 50mm square)\u003c\/li\u003e\n\u003cli\u003eAn electronic field rotator\u003c\/li\u003e\n\u003cli\u003eAn adaptive optics unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis generous spacing is a key feature for advanced imagers who need to accommodate a full suite of equipment without compromising the ability to reach focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do the 3 cooling fans on the ODK14Tr improve imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e3 controllable fans\u003c\/strong\u003e are crucial for thermal management. They actively pull air across the back of the 350mm primary mirror, forcing it to cool down to the ambient nighttime temperature much faster than it would passively. This minimizes \"mirror seeing,\" the image-degrading turbulence created by warm air rising from a mirror that is still warmer than its surroundings. The result is sharper images, sooner in your observing session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ODK14Tr's f\/6.8 focal ratio suitable for imaging faint nebulae like the Elephant's Trunk Nebula (IC 1396)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, \u003cstrong\u003ef\/6.8\u003c\/strong\u003e is a very capable focal ratio for faint nebulae, especially when paired with a large \u003cstrong\u003e350mm aperture\u003c\/strong\u003e. While not as fast as dedicated hyper-widefield systems, it offers a superb balance, collecting a great deal of light while providing the high resolution needed to capture intricate details in structures like the pillars and Bok globules within IC 1396. Modern, low-noise CMOS sensors make this focal ratio highly efficient for both broadband and narrowband imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do the spot sizes of 2.1μm and 5.6μm mean for my images with the ODK14Tr?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThese figures quantify the sharpness of the telescope. A \u003cstrong\u003e2.1μm spot size on-axis\u003c\/strong\u003e and \u003cstrong\u003e5.6μm at the field edge\u003c\/strong\u003e means that the telescope focuses starlight into incredibly tight, concentrated points. Most modern astronomy cameras have pixel sizes between 2.5μm and 9μm. Because the ODK14Tr's spot sizes are smaller than or comparable to these pixel sizes, it ensures that the telescope's optics will not be the limiting factor in your image resolution; you will get the full benefit of your camera's sensor, with sharp, pinpoint stars across the entire frame.\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\u003eOptimized Dall-Kirkham (ODK)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2380mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector\u003c\/td\u003e\n\u003ctd\u003eMulti-coated 3-lens design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlat Field Size\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;52mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (On-Axis)\u003c\/td\u003e\n\u003ctd\u003e2.1μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size (Field Edge)\u003c\/td\u003e\n\u003ctd\u003e5.6μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e136mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e210mm (from rear of mirror cell, ±1mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Crayford with 10:1 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e700mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003eapprox. 26kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eHoneycomb CNC machined aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans (heaters optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttachment Method\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium dovetail with supports\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\"\u003eODK14Tr Truss 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\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":52942366572829,"sku":"OOUK-ODK14TR-OPTICAL-TUBE-ASSEMBLY","price":20225.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_a024eb5b-9702-4d62-82e4-d3c70289f9df.jpg?v=1789606940"},{"product_id":"orion-optics-uk-odk16tr-optical-tube-assembly","title":"Orion Optics UK ODK16Tr Truss Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e400mm (16\") Optimized Dall-Kirkham Optics\u003c\/li\u003e\n\u003cli\u003e2720mm Focal Length (f\/6.8)\u003c\/li\u003e\n\u003cli\u003e\u0026gt;52mm Fully Corrected and Illuminated Image Circle\u003c\/li\u003e\n\u003cli\u003e2.4µm On-Axis Spot Size\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Truss Tube Construction\u003c\/li\u003e\n\u003cli\u003e3\" Crayford Focuser with 10:1 Reduction\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 ODK16Tr Truss Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK ODK16Tr is an observatory-class astrograph, combining a 400mm primary mirror with a fast f\/6.8 focal ratio to deliver professional imaging results. Its 3-lens corrector illuminates a flat field greater than 52mm in diameter, producing pinpoint stars with a 2.4µm spot size on-axis and 6.0µm at the field edge. The entire optical system is housed in a thermally stable carbon fibre sandwich truss tube weighing approximately 36kg and supported by a robust 3\" Crayford focuser.\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\u003eODK16Tr: A 400mm f\/6.8 Corrected Dall-Kirkham Astrograph\u003c\/h3\u003e\n\u003cp\u003eThe ODK16Tr's optical design starts with a 400mm primary mirror in an optimized Dall-Kirkham configuration, which uses an elliptical primary and a spherical secondary. This combination is precisely figured in-house by Orion Optics UK's master opticians. To eliminate the off-axis coma inherent in the standard DK design, a dedicated multi-coated 3-lens corrector is permanently installed, creating a coma-free, flat-field instrument with a 2720mm focal length.\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\u003eA \u0026gt;52mm Flat Field with 2.4µm On-Axis Spots\u003c\/h3\u003e\n\u003cp\u003eThis instrument is engineered for large-format sensors. The optical system produces a fully illuminated and corrected image circle greater than 52mm, comfortably covering full-frame (43mm diagonal) and many medium-format astrophotography cameras. The correction is exceptional, delivering an incredibly tight 2.4µm spot size on-axis and maintaining 6.0µm spots at the extreme edge of the field, ensuring that every pixel on your large sensor captures a sharp, aberration-free star.\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 Fibre Truss and 3-Fan Cooling\u003c\/h3\u003e\n\u003cp\u003eMechanical and thermal stability are critical at this scale. The ODK16Tr uses a carbon fibre sandwich material for its truss tube, which offers superior stiffness and a near-zero coefficient of thermal expansion to hold focus through temperature changes. The open truss design, weighing approximately 36kg, allows the 400mm primary mirror to acclimate rapidly, a process accelerated by three controllable cooling fans integrated into the CNC-machined honeycomb mirror cell. For maximum contrast, an optional light shroud is recommended to block stray light.\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\u003e3\" Crayford Focuser and 216mm of Back Focus\u003c\/h3\u003e\n\u003cp\u003eThe imaging train is anchored by a heavy-duty 3\" Crayford focuser with a 10:1 fine-adjustment knob, capable of supporting large cameras, filter wheels, and off-axis guiders without flexure. The system provides a generous 216mm of back focal distance measured from the rear of the mirror cell. This ample spacing gives you complete flexibility to configure your ideal imaging setup with rotators, adaptive optics, and other accessories while still reaching perfect focus.\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\u003eODK16Tr vs. Ritchey-Chrétien: Field Correction and Spot Size\u003c\/h3\u003e\n\u003cp\u003eWhile the Ritchey-Chrétien (RC) is a common choice for two-mirror astrographs, the corrected Dall-Kirkham offers distinct advantages. An RC naturally corrects for coma but leaves off-axis astigmatism, which can elongate stars at the edge of the field. The ODK16Tr's integrated 3-lens corrector is specifically designed to eliminate both coma and astigmatism, resulting in rounder stars and smaller spot sizes across its entire \u0026gt;52mm field of view. This design delivers a higher level of performance for imagers using the largest available sensors.\u003c\/p\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 size camera sensor can the ODK16Tr fully illuminate?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ODK16Tr is designed to fully illuminate and correct an image circle \u003cstrong\u003egreater than 52mm\u003c\/strong\u003e in diameter. This comfortably covers professional full-frame sensors (e.g., Sony IMX455, 43mm diagonal) and even larger medium-format sensors like the KAF-16803 (39mm diagonal) with no vignetting from the optical system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat class of mount is required for the ODK16Tr OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a tube weight of approximately \u003cstrong\u003e36kg (around 80 lbs)\u003c\/strong\u003e before adding a camera and accessories, the ODK16Tr requires a high-capacity, observatory-grade equatorial mount. Look for mounts with a specified instrument capacity of at least 100-120 lbs (45-55 kg) to ensure stability for long-exposure imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the ODK16Tr's design help maintain focus during temperature drops?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ODK16Tr uses a \u003cstrong\u003ecarbon fibre sandwich\u003c\/strong\u003e material for its truss tube. Carbon fibre has an extremely low coefficient of thermal expansion, meaning it does not shrink or expand significantly as temperatures change overnight. This keeps the distance between the primary and secondary mirrors constant, preventing focus shift and ensuring sharp images throughout your session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ODK16Tr's f\/6.8 focal ratio suitable for imaging faint nebulae like the Veil Nebula (NGC 6960)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. While f\/6.8 is not as \"fast\" as some dedicated wide-field refractors, the ODK16Tr's massive \u003cstrong\u003e400mm aperture\u003c\/strong\u003e gathers a tremendous amount of light. This light-gathering power makes it highly effective for narrowband imaging of faint emission nebulae, resolving fine filamentary details in targets like the Veil Nebula or the Cygnus Loop with impressive signal-to-noise ratios.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the ODK16Tr's 2720mm focal length frame a target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e2720mm focal length\u003c\/strong\u003e provides a high-magnification view ideal for detailed studies of smaller deep-sky objects or for creating mosaics of large ones. A full-frame camera on the ODK16Tr would frame the bright core of the Andromeda Galaxy (M31) in incredible detail, resolving individual dust lanes and star-forming regions, but it would not capture the entire 3-degree span of the galaxy in a single shot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to add a light shroud to the ODK16Tr's truss tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, a light shroud is highly recommended. The open truss design promotes rapid cooling but is susceptible to stray light from external sources and can be more prone to dew formation on the secondary mirror. A fabric light shroud will significantly improve image contrast by creating a dark interior and will also help protect the optics from dew.\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\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2720mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Design\u003c\/td\u003e\n\u003ctd\u003eMulti-coated 3 lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlat Field Size\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;52mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size on Axis\u003c\/td\u003e\n\u003ctd\u003e2.4μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot Size at Field Edge\u003c\/td\u003e\n\u003ctd\u003e6.0μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e152mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focal Distance\u003c\/td\u003e\n\u003ctd\u003e216mm (from rear of mirror cell, ±1mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3\" Crayford with 10:1 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e820mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\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\u003eapprox. 36kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eHoneycomb CNC machined aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror \u0026amp; Tube Cooling\u003c\/td\u003e\n\u003ctd\u003e3 controllable fans, heaters optional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttachment Method\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium dovetail with supports\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\"\u003eODK16Tr Truss 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":52942368145693,"sku":"OOUK-ODK16TR-OPTICAL-TUBE-ASSEMBLY","price":27897.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_689b3e0d-88fa-4a57-8d85-797329a5a5a8.jpg?v=1789606948"},{"product_id":"orion-optics-uk-odk18tr-optical-tube-assembly","title":"Orion Optics UK ODK18Tr Truss Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eOptimized Dall-Kirkham (ODK) Optical Design\u003c\/li\u003e\n\u003cli\u003eOpen Truss Tube Framework\u003c\/li\u003e\n\u003cli\u003ePrimary and Secondary Mirrors by Orion Optics UK\u003c\/li\u003e\n\u003cli\u003eEngineered for Astrophotography\u003c\/li\u003e\n\u003cli\u003eAvailable with Multiple Optical Precision Grades\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\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 ODK18Tr Truss Optical Tube Assembly\u003c\/h2\u003e\n      \u003cp\u003eThe Orion Optics UK ODK18Tr is an imaging-first instrument built around the advanced Optimized Dall-Kirkham optical design. Its open truss structure is engineered for rapid thermal equalization and mechanical rigidity, providing a stable platform for demanding astrophotography. This OTA combines a corrected, coma-free field with the meticulous, hand-finished optical quality Orion Optics UK is known for, delivering professional-grade results from a permanent observatory or a portable deep-sky setup.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eThe Optimized Dall-Kirkham Advantage\u003c\/h3\u003e\n      \u003cp\u003eThe ODK18Tr employs an Optimized Dall-Kirkham (ODK) design, a significant advancement over the classical Dall-Kirkham. While the base design uses an elliptical primary and spherical secondary, the ODK incorporates a corrector lens group to eliminate off-axis coma and deliver a flat, sharp field of view. This makes the ODK18Tr exceptionally well-suited for use with modern large-format CMOS and CCD sensors, ensuring point-like stars across the entire frame without the need for an additional external coma corrector.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eOpen Truss Framework for Thermal Stability\u003c\/h3\u003e\n      \u003cp\u003eUnlike a solid-tube design, the ODK18Tr's open truss framework allows ambient air to circulate freely around the primary mirror. This design minimizes the risk of tube currents and allows the optics to reach thermal equilibrium with the night air much faster. The result is a more stable image, free from the distortions caused by trapped warm air, enabling you to start high-resolution imaging sooner and maintain focus throughout the night.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eOrion Optics UK Hand-Figured Optics: A Choice of Precision Grades\u003c\/h3\u003e\n      \u003cp\u003eAt the heart of every ODK18Tr are primary and secondary mirrors manufactured and hand-figured in the Orion Optics UK workshop. Rather than relying solely on machine polishing, skilled opticians refine each optical surface to an exceptional standard of accuracy. This process allows Orion Optics UK to offer several grades of optical precision, measured in Peak-to-Valley (PV) wavefront error, allowing you to select the level of optical perfection your imaging demands.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eStandard Optics (1\/4 PV):\u003c\/strong\u003e The minimum grade, offering excellent performance for general deep-sky imaging.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eProfessional Optics (1\/6 PV):\u003c\/strong\u003e A significant step up, providing higher contrast and sharper detail, ideal for more serious imagers.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eResearch Grade (1\/8 PV):\u003c\/strong\u003e A premium level of correction that reveals finer planetary detail and resolves tighter star clusters.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eUltra Grade (1\/10 PV):\u003c\/strong\u003e The highest level of precision offered, for those who require the most accurate and high-contrast images possible from the aperture.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is an Optimized Dall-Kirkham (ODK) and how does the ODK18Tr benefit from it?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAn \u003cstrong\u003eOptimized Dall-Kirkham (ODK)\u003c\/strong\u003e is a type of Cassegrain telescope that uses an elliptical primary mirror, a spherical secondary mirror, and a small corrector lens group near the focuser. This design corrects for off-axis coma and field curvature, producing a wide, flat, and sharp field of view that is ideal for astrophotography with large sensor cameras.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the advantages of the ODK18Tr's truss tube design?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe ODK18Tr's open truss design offers two primary benefits. First, it promotes \u003cstrong\u003erapid thermal acclimation\u003c\/strong\u003e by allowing air to flow freely over the optics, reducing cooldown time and minimizing image-degrading tube currents. Second, a well-designed truss structure provides exceptional \u003cstrong\u003estiffness and rigidity\u003c\/strong\u003e, which helps maintain precise optical alignment regardless of the telescope's orientation.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I choose the right Orion Optics UK optical grade for the ODK18Tr?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe choice depends on your primary observing goals and budget.\n      \u003c\/p\u003e\n\u003cul\u003e\n        \u003cli\u003eFor general deep-sky imaging, the \u003cstrong\u003e1\/4 PV Standard\u003c\/strong\u003e optics will deliver excellent results.\u003c\/li\u003e\n        \u003cli\u003eFor those seeking higher contrast and resolving finer details, the \u003cstrong\u003e1\/6 PV Professional\u003c\/strong\u003e grade is a worthwhile upgrade.\u003c\/li\u003e\n        \u003cli\u003eFor planetary imaging or scientific work where maximum resolution is critical, the \u003cstrong\u003e1\/8 PV Research\u003c\/strong\u003e or \u003cstrong\u003e1\/10 PV Ultra\u003c\/strong\u003e grades ensure the highest possible optical performance.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ODK18Tr OTA suitable for visual astronomy?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile the ODK18Tr is optically optimized for imaging, its high-contrast, coma-free views are also superb for visual observation. The large aperture will provide stunning views of deep-sky objects like the Orion Nebula (M42) and distant galaxies, while the high-quality optics will reveal intricate detail on Jupiter and Saturn. Its primary design focus, however, remains astrophotography.\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 ODK18Tr OTA?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAn 18-inch truss tube OTA is a large and heavy instrument. It requires a substantial, observatory-class German equatorial mount with a high payload capacity. You should consider mounts from manufacturers like Software Bisque, Astro-Physics, or 10Micron capable of handling the telescope's weight and moment arm to ensure stable, accurate tracking for long-exposure astrophotography.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the open truss design of the ODK18Tr require a light shroud?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, for best results, a light shroud is highly recommended. The open truss tube can allow stray light from external sources (like house lights or the moon) to enter the optical path, which can reduce contrast in your images. A fabric light shroud blocks this stray light while still allowing for air circulation, preserving both image contrast and thermal stability.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\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":52942368637213,"sku":"OOUK-ODK18TR-OPTICAL-TUBE-ASSEMBLY","price":43433.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_4ecd5251-bae0-4ed8-a630-f69508cd963f.jpg?v=1789606956"},{"product_id":"orion-optics-uk-odk20tr-optical-tube-assembly","title":"Orion Optics UK ODK20Tr Optical tube assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e500mm truss-tube Dall-Kirkham\u003c\/li\u003e\n\u003cli\u003ef\/6.8 carbon-fibre-sandwich optics\u003c\/li\u003e\n\u003cli\u003eOpen truss for shorter packed length\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\u003eODK20Tr Truss Telescope\u003c\/h2\u003e\n\u003cp\u003eThe ODK20Tr is a 500mm truss-tube Dall-Kirkham telescope in Orion Optics UK's ODKTr range -- the same f\/6.8 carbon-fibre-sandwich optical design as the standard ODK range, in an open truss configuration for a shorter packed tube length.\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\u003eTruss Design for Transport\u003c\/h3\u003e\n\u003cp\u003eThe open truss structure packs down to a shorter length than the standard ODK tube while keeping the same f\/6.8 optical design. Individually built to order in the UK; contact Orion Optics UK for full ODK20Tr 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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e500mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube design\u003c\/td\u003e\n\u003ctd\u003eOpen truss\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\"\u003eODK20Tr 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":52942368702749,"sku":"OOUK-ODK20TR-OPTICAL-TUBE-ASSEMBLY","price":53215.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_29a85537-4e31-4600-96a7-4a87bdef9420.jpg?v=1789606965"},{"product_id":"orion-optics-uk-odk24tr-optical-tube-assembly","title":"Orion Optics UK ODK24Tr Truss Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eOptimized Dall-Kirkham (ODK) Optical Design\u003c\/li\u003e\n\u003cli\u003eCorrected, Coma-Free Flat Field for Imaging\u003c\/li\u003e\n\u003cli\u003eOpen Truss Tube for Thermal Stability and Rigidity\u003c\/li\u003e\n\u003cli\u003eHand-Finished Primary and Secondary Mirrors\u003c\/li\u003e\n\u003cli\u003eManufactured by Orion Optics 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\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 ODK24Tr Truss Optical Tube Assembly\u003c\/h2\u003e\n      \u003cp\u003eThe Orion Optics UK ODK24Tr Truss Optical Tube Assembly represents a pinnacle of astrographic design, combining a large-aperture, flat-field Optimized Dall-Kirkham (ODK) optical system with a rigid, thermally stable open truss framework. Engineered for serious imagers, the ODK24Tr leverages Orion Optics UK's renowned expertise in hand-figuring large optics to deliver professional-grade astronomical performance.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eOptimized Dall-Kirkham: A Coma-Free, Flat-Field Astrograph\u003c\/h3\u003e\n      \u003cp\u003eThe ODK optical system is an advanced version of the Dall-Kirkham design, featuring an elliptical primary mirror, a spherical secondary, and a built-in corrector lens group. This configuration produces a wide, flat, and fully illuminated field of view that is free from off-axis coma, making the ODK24Tr ideal for use with modern large-format CMOS and CCD cameras.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eOpen Truss Framework: Thermal Stability and Rigidity\u003c\/h3\u003e\n      \u003cp\u003eThe open truss structure of the ODK24Tr provides exceptional mechanical rigidity while minimizing weight compared to a solid tube. This design allows the primary mirror to acclimate rapidly to ambient nighttime temperatures, reducing tube currents and ensuring the sharpest possible images. While the open frame excels at thermal management, using a light shroud is recommended to block stray light and protect the optics from dew.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eOrion Optics UK Hand-Figured Optics: The Path to Wavefront Accuracy\u003c\/h3\u003e\n      \u003cp\u003eAt the heart of the ODK24Tr are optics hand-finished by Orion Optics UK's master opticians. Every mirror is subjected to rigorous testing with a Zygo laser interferometer to ensure its surface accuracy meets exacting standards. This commitment to precision is what separates OOUK from mass-produced instruments.\u003c\/p\u003e\n      \u003cp\u003eOrion Optics UK offers multiple grades of optical accuracy, from their excellent 1\/4 PV wavefront Standard optics to their near-perfect 1\/10 PV wavefront Ultra grade. This dedication to quantifiable optical quality ensures that the telescope's performance is limited only by the seeing conditions, not by the mirror itself.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is an \"Optimized Dall-Kirkham\" (ODK) design on the ODK24Tr?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003eOptimized Dall-Kirkham (ODK)\u003c\/strong\u003e is a specialized Cassegrain-style telescope designed for astrophotography. It uses an elliptical primary mirror, a spherical secondary, and a corrector lens system. This combination corrects for optical aberrations like coma and provides a flat focal plane, resulting in sharp, pinpoint stars across a wide, well-illuminated field of view, which is critical for imaging with large sensors.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the advantages of the ODK24Tr's truss tube design?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe truss design offers two main benefits for a large telescope like the ODK24Tr:\u003c\/p\u003e\n    \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThermal Stability:\u003c\/strong\u003e The open frame allows air to circulate freely around the primary mirror, letting it cool down to the ambient temperature much faster than a solid tube. This minimizes internal air currents (tube seeing) that can degrade image sharpness.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh Rigidity-to-Weight Ratio:\u003c\/strong\u003e The truss structure provides a very stiff platform to maintain optical alignment without the immense weight of a comparable solid tube, making it more manageable on a high-capacity mount.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does Orion Optics UK's mirror quality mean for the ODK24Tr?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eOrion Optics UK (OOUK) is renowned for its hand-figured and finished mirrors, which are tested on a Zygo interferometer to guarantee a specific level of wavefront accuracy (e.g., 1\/4 PV, 1\/6 PV, or higher). For the ODK24Tr, this means the optics are crafted to an extremely high standard of precision, delivering maximum contrast and sharpness for demanding planetary and deep-sky imaging.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the ODK24Tr perform for imaging a large target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe ODK24Tr is exceptionally well-suited for large targets like the Andromeda Galaxy (M31). Its flat-field, coma-corrected optics are designed to illuminate large camera sensors evenly, ensuring that stars are sharp from the galaxy's core to its outermost spiral arms. The large aperture gathers immense amounts of light, revealing faint dust lanes and star-forming regions with shorter exposure times.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ODK24Tr suitable for planetary viewing, for example, observing the Cassini Division on Saturn?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. While designed as an astrograph, the high-precision optics of the ODK24Tr make it a superb planetary instrument. The certified wavefront accuracy from Orion Optics UK ensures maximum image contrast, which is essential for resolving fine details like the Cassini Division in Saturn's rings, cloud bands on Jupiter, or surface features on Mars.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is thermal management important for a large telescope like the ODK24Tr?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor any large-aperture telescope, thermal management is critical. If the primary mirror is warmer than the surrounding air, it creates a boundary layer of turbulent air directly in the light path, which blurs the image—a phenomenon known as \"mirror seeing.\" The ODK24Tr's open truss design helps prevent this by allowing the mirror to reach thermal equilibrium with the environment quickly, preserving the telescope's high-resolution capabilities.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\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":52942368932125,"sku":"OOUK-ODK24TR-OPTICAL-TUBE-ASSEMBLY","price":118331.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_f71c6b05-8e6e-4145-9358-b4b28aa1f910.jpg?v=1789606973"},{"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"},{"product_id":"orion-optics-uk-ct8-optical-tube-assembly","title":"Orion Optics UK CT8 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e200mm (8\") Aperture\u003c\/li\u003e\n\u003cli\u003e900mm Focal Length (f\/4.5)\u003c\/li\u003e\n\u003cli\u003e1\/10 PV Wavefront Certified Optics\u003c\/li\u003e\n\u003cli\u003eCarbon Fiber Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e7kg Optical Tube Weight\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 CT8 Optical Tube Assembly\u003c\/h2\u003e\n      \u003cp\u003eThe Orion Optics UK CT8 combines a fast f\/4.5 focal ratio with a 200mm aperture, built around a hand-figured Suprax primary mirror certified to a 1\/10 PV wavefront accuracy. This instrument is engineered for high-resolution imaging, weighing only 7kg thanks to its carbon fiber sandwich tube construction which measures 860mm in length. Every optical surface features Enhanced Hilux coatings for maximum light transmission, delivering views where contrast is limited only by atmospheric seeing, not the telescope's optical precision.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eUltra-Grade Optics: A Certified 1\/10 PV Wavefront System\u003c\/h3\u003e\n      \u003cp\u003eThe heart of the CT8 is its 200mm primary mirror, figured to Orion Optics UK's highest \"Ultra\" grade of 1\/10 PV wavefront. This is not a theoretical standard; each CT8 is delivered with its own Zygo laser interferometry report, verifying that its optical surface deviates from a perfect parabola by a fraction of a wavelength of light. The Suprax primary mirror, with its low thermal expansion, is finished with Enhanced Hilux coatings to ensure maximum reflectivity for capturing faint deep-sky detail.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n    \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eCarbon Fiber Construction: A 7kg Tube with Zero Thermal Expansion\u003c\/h3\u003e\n      \u003cp\u003eThe optical tube is a sandwich-construction carbon fiber design, providing extreme rigidity and near-zero thermal expansion. This physical stability is critical for a fast f\/4.5 system, as it maintains a constant focal plane even as ambient temperatures change during an imaging session. At a mere 7kg, the 860mm long tube is easily managed by mid-range equatorial mounts, making it an accessible choice for imagers who demand optical perfection without requiring a massive support system.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eImaging-Ready Mechanics: 9-Point Cell and Precision 2\" Focuser\u003c\/h3\u003e\n      \u003cp\u003eEvery mechanical component is designed to support the optical system's potential. The primary mirror rests on a 9-point flotation CNC machined cell that prevents flexure and is supported by a fan cooling system for rapid thermal stabilization. Upfront, a 2\" focuser with reduction gearing allows for fine, repeatable focus adjustments, while the 63mm secondary mirror is held by a fully adjustable 4-vane spider and rotatable holder, ensuring precise collimation.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCNC Tube Rings:\u003c\/strong\u003e A pair of anodised black, CNC machined rings weighing 1kg provides a secure mounting platform for the OTA.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eIncluded Finder:\u003c\/strong\u003e An 8x50 achromatic finderscope helps in locating and centering targets before imaging.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eExtension Tube:\u003c\/strong\u003e A 40mm screw-threaded extension tube is included to help achieve focus with a variety of cameras and accessories.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eThe 1\/10 PV Advantage: What You See vs. Standard 1\/4 PV Optics\u003c\/h3\u003e\n      \u003cp\u003eWhile many telescopes are described as \"diffraction-limited\" (equivalent to 1\/4 PV wavefront), a 1\/10 PV system delivers a fundamentally higher level of image fidelity. This difference is most apparent on high-contrast planetary and lunar targets. With 1\/10 PV optics, you resolve finer, more stable detail within Jupiter's cloud bands, see the Cassini Division in Saturn's rings as a sharp black gap, and discern subtle rilles on the Moon that would be blurred or invisible in a lesser instrument.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 1\/10 PV wavefront of the CT8 mean for planetary viewing?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA \u003cstrong\u003e1\/10 PV wavefront\u003c\/strong\u003e means the mirror surface is exceptionally close to a perfect parabola. For planetary observers, this translates to higher contrast and sharper detail. You will see more subtle features in Jupiter's atmosphere, crisper definition in Saturn's rings, and finer details in lunar craters compared to standard 1\/4 PV optics, especially during moments of good atmospheric seeing.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the f\/4.5 focal ratio of the CT8 benefit deep-sky imaging of the Orion Nebula (M42)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe fast \u003cstrong\u003ef\/4.5 focal ratio\u003c\/strong\u003e allows the 200mm aperture to gather light very quickly. When imaging a bright, extended object like the Orion Nebula (M42), this means you can capture significant detail in shorter sub-exposures. This reduces the demands on your mount's tracking accuracy and allows you to build up a deep, high-signal image in less total time.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the CT8's carbon fiber tube worth it over an aluminum tube?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, particularly for astrophotography. Carbon fiber has virtually \u003cstrong\u003ezero thermal expansion\u003c\/strong\u003e. As temperatures drop overnight, a metal tube will shrink, causing the focal point to shift and requiring refocusing. The CT8's carbon fiber tube holds focus stable throughout the night, which is a critical advantage for long imaging sessions.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is needed for the 7kg CT8 optical tube?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe CT8 optical tube weighs \u003cstrong\u003e7kg\u003c\/strong\u003e, and the rings add another \u003cstrong\u003e1kg\u003c\/strong\u003e. A total payload of 8kg plus your camera and guide scope (likely 10-11kg total) requires a stable equatorial mount. Mounts in the EQ6\/CEM40 class or larger are recommended for astrophotography to ensure tracking accuracy and stability.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the CT8 come with eyepieces or a diagonal?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. The CT8 is supplied as an optical tube assembly optimized for astrophotography. It does not include eyepieces, a diagonal, or a barlow lens. You will need to supply your own 1.25\" or 2\" eyepieces for visual use. A quality coma corrector is also highly recommended for imaging with its fast f\/4.5 optics.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the 9-point mirror cell on the CT8?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003e9-point suspension mirror cell\u003c\/strong\u003e provides uniform support to the back of the 200mm primary mirror. This prevents the mirror from sagging or deforming under its own weight as the telescope points to different parts of the sky, which would degrade the image. This precise mechanical support is essential to maintaining the certified 1\/10 PV optical quality in practice.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\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\u003e900mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.5\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Grade\u003c\/td\u003e\n\u003ctd\u003e1\/10 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Glass\u003c\/td\u003e\n\u003ctd\u003eSuprax\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced Hilux\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e63mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e255mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e860mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e7kg\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" focuser with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium, 9 point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSpider\u003c\/td\u003e\n\u003ctd\u003eAdjustable 4-vane, stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSecondary Holder\u003c\/td\u003e\n\u003ctd\u003eMachined aluminium, rotatable\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e8x50\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eExtension Tubes\u003c\/td\u003e\n\u003ctd\u003e40mm long, screw threaded\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Rings\u003c\/td\u003e\n\u003ctd\u003eCNC machined, anodised black\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWeight of Rings\u003c\/td\u003e\n\u003ctd\u003e1kg\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBoxed Dimensions\u003c\/td\u003e\n\u003ctd\u003e87x48x48mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBoxed Weight\u003c\/td\u003e\n\u003ctd\u003e10.7kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eCT8 Carbon Tube OTA\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eCNC Tube Rings\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003e8x50 Finderscope with Bracket\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003e40mm Extension Tube\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eZygo Interferometry Test Report\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\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":52942379417885,"sku":"OOUK-CT8-OPTICAL-TUBE-ASSEMBLY","price":3132.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_3d62404a-c67e-4a94-b599-38773701bfec.jpg?v=1789607180"},{"product_id":"orion-optics-uk-ct10-optical-tube-assembly","title":"Orion Optics UK CT10 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e250mm (10\") Aperture Newtonian Reflector\u003c\/li\u003e\n\u003cli\u003e1200mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/4.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eGuaranteed 1\/10 PV Wavefront Optics\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Construction Tube\u003c\/li\u003e\n\u003cli\u003e9-Point CNC Machined Mirror Cell\u003c\/li\u003e\n\u003cli\u003e2\" Focuser with Reduction Gearing\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 CT10 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK CT10 sets an uncompromising standard for high-resolution imaging, built around a hand-figured 250mm Suprax primary mirror guaranteed to a 1\/10 PV wavefront accuracy. Its fast f\/4.8 focal ratio and 1200mm focal length provide the image scale needed for detailed views of planets and deep-sky targets. Housed in a 1050mm carbon fibre sandwich tube and supported by a 9-point CNC-machined cell, the CT10 delivers optical perfection with the mechanical stability required to achieve it.\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\u003eUltra-Grade 1\/10 PV Optics: The Apex of Newtonian Performance\u003c\/h3\u003e\n\u003cp\u003eThe heart of the CT10 is its 250mm primary mirror, figured to Orion Optics UK's highest \"Ultra\" grade of 1\/10 Peak-to-Valley (PV) wavefront. This level of precision, verified by an included Zygo interferometer report, ensures that the maximum amount of light is focused into a single point, producing images with exceptional contrast and sharpness. Paired with enhanced Hilux coatings, the optical system delivers maximum light transmission for brighter views of faint objects.\u003c\/p\u003e\n\u003cp\u003eCompared to standard \"diffraction-limited\" 1\/4 PV optics, a 1\/10 PV mirror minimizes scattered light and resolves finer details, a critical advantage for separating tight double stars or discerning subtle cloud bands on Jupiter. This isn't an optional upgrade; it's the standard for the CT series, built for observers who demand the highest possible fidelity from their instrument.\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 Fibre Sandwich Tube: 1050mm of Thermal Stability\u003c\/h3\u003e\n\u003cp\u003eTo maintain the precision of its optics, the CT10 employs a carbon fibre sandwich tube with a 300mm diameter. This advanced material has a near-zero coefficient of thermal expansion, meaning the 1200mm focal length remains constant even as ambient temperatures drop during an observing session. This eliminates the need for constant refocusing, a common issue with aluminum or steel tube telescopes, making it ideal for long-exposure astrophotography.\u003c\/p\u003e\n\u003cp\u003eThe 1050mm tube is finished with a gloss exterior and a matte black interior to absorb stray light and maximize image contrast. At a weight of only 11kg, the CT10 OTA is manageable for a wide range of equatorial mounts capable of supporting its payload and length.\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\u003ePrecision Mechanics: A 9-Point Cell and 2\" Geared Focuser\u003c\/h3\u003e\n\u003cp\u003eAn exceptional mirror requires an equally capable support system. The CT10 features a CNC-machined 9-point flotation cell that supports the 250mm primary mirror without introducing any print-through or astigmatism. This ensures the mirror's lab-tested accuracy is realized at the eyepiece. The secondary mirror is held in a rigid, rotatable aluminum holder by a fully adjustable 4-vane stainless steel spider, minimizing diffraction effects.\u003c\/p\u003e\n\u003cp\u003eFor critical focusing, the CT10 is equipped with a 2\" focuser with reduction gearing, allowing for smooth, minute adjustments essential for achieving sharp focus at high magnifications or with an imaging camera. The optical train is completed with a pair of CNC-machined tube rings, providing a secure and stable mounting platform for the 11kg tube assembly.\u003c\/p\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 does the 1\/10 PV wavefront accuracy of the CT10 mean for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003e1\/10 PV wavefront\u003c\/strong\u003e means the primary mirror's surface is exceptionally close to a perfect parabola. For visual observers, this translates to higher contrast and sharpness, especially on challenging targets. You'll notice crisper detail in planetary cloud bands, tighter star points, and the ability to resolve faint companion stars closer to their brighter primaries. It ensures you are seeing everything the telescope's 250mm aperture is capable of resolving.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the CT10's carbon fibre tube help with astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003ecarbon fibre sandwich tube\u003c\/strong\u003e has virtually zero thermal expansion. During a long imaging session, temperature changes can cause metal tubes to shrink, shifting the focal plane and ruining sharp focus. The CT10's tube holds focus rigidly throughout the night, preventing focus drift in your sub-exposures and resulting in consistently sharp images from start to finish.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the f\/4.8 focal ratio of the CT10 good for imaging galaxies like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003ef\/4.8 focal ratio\u003c\/strong\u003e is considered fast and is excellent for deep-sky imaging. It allows you to collect a significant amount of light in shorter exposure times compared to slower f\/8 or f\/10 systems. While a coma corrector (sold separately) is recommended for achieving perfect star shapes across the entire field with large camera sensors, the CT10's combination of aperture and speed makes it a powerful instrument for capturing faint details in galaxies and nebulae.\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 Orion Optics UK CT10?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe CT10 optical tube weighs \u003cstrong\u003e11kg\u003c\/strong\u003e and the rings add another \u003cstrong\u003e1.5kg\u003c\/strong\u003e, for a total of 12.5kg (approx. 27.5 lbs) before adding a camera or other accessories. For stable astrophotography, you should choose a German Equatorial Mount with a payload capacity of at least 40-45 lbs (approx. 20kg) to ensure rigidity and accurate tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Orion Optics UK CT10 for high-magnification views of Jupiter's Great Red Spot?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The CT10 is an exceptional planetary instrument. Its guaranteed \u003cstrong\u003e1\/10 PV wavefront\u003c\/strong\u003e optics, combined with the large \u003cstrong\u003e250mm aperture\u003c\/strong\u003e for high resolution, will deliver incredibly detailed and high-contrast views of Jupiter, Saturn, and Mars when seeing conditions permit. The precision 2\" focuser with reduction gearing is crucial for achieving the critical focus needed at the high magnifications required for such observations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the CT10's 9-point mirror cell for a 250mm mirror?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003e9-point flotation cell\u003c\/strong\u003e provides optimized support for the 250mm (10-inch) primary mirror. It distributes the mirror's \u003cstrong\u003e11kg\u003c\/strong\u003e weight evenly across nine points, preventing gravitational sag or flexure as the telescope moves. This ensures the mirror retains its precise 1\/10 PV shape, free from any induced astigmatism, regardless of where the telescope is pointed in the sky.\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\u003eOptics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/10 PV Wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e250mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Glass\u003c\/td\u003e\n\u003ctd\u003eSuprax\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced Hilux\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e63mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1050mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e11kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" focuser with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinder Scope\u003c\/td\u003e\n\u003ctd\u003e8x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium, 9 point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpider\u003c\/td\u003e\n\u003ctd\u003eAdjustable 4 vane, stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Holder\u003c\/td\u003e\n\u003ctd\u003eMachined aluminium, rotatable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Rings\u003c\/td\u003e\n\u003ctd\u003eCNC machined tube rings, anodised black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Weight\u003c\/td\u003e\n\u003ctd\u003e1.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtension Tubes\u003c\/td\u003e\n\u003ctd\u003e40mm long, screw threaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoxed Dimensions\u003c\/td\u003e\n\u003ctd\u003e128x52x52mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoxed Weight\u003c\/td\u003e\n\u003ctd\u003e17kg\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":52942379516189,"sku":"OOUK-CT10-OPTICAL-TUBE-ASSEMBLY","price":4356.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_ae8497e7-2f2c-4d11-b94e-f91dc5d21578.jpg?v=1789607188"},{"product_id":"orion-optics-uk-ct10l-optical-tube-assembly","title":"Orion Optics UK CT10L Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e250mm (10-inch) Aperture\u003c\/li\u003e\n\u003cli\u003e1575mm Focal Length (f\/6.3)\u003c\/li\u003e\n\u003cli\u003eGuaranteed 1\/10 PV Wavefront Optics\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e12.5kg Optical Tube Weight\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\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 CT10L Optical Tube Assembly\u003c\/h2\u003e\n      \u003cp\u003eThe Orion Optics UK CT10L is an instrument of uncompromising optical quality, built around a 250mm f\/6.3 primary mirror hand-figured to a guaranteed 1\/10 PV wavefront accuracy. Its 1575mm focal length provides the magnification needed for detailed planetary observation, while the carbon fibre tube, measuring 1440mm long, ensures focus remains stable as temperatures change. Weighing just 12.5kg, this OTA delivers research-grade optical performance in a package manageable by mid-range equatorial mounts.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eGuaranteed 1\/10 PV Wavefront Optics: The Pinnacle of Newtonian Correction\u003c\/h3\u003e\n      \u003cp\u003eThe heart of the CT10L is its 250mm Suprax primary mirror, which is not just diffraction-limited, but corrected to the highest possible standard offered by Orion Optics UK. A 1\/10 PV wavefront figure means the mirror surface deviates from a perfect parabola by an incredibly small margin, resulting in maximum contrast and sharpness. Every CT10L is delivered with its own Zygo laser interferometry report, providing certified proof of its elite optical quality.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eEnhanced Hilux Coatings:\u003c\/strong\u003e Multi-layer dielectric coatings deliver superior reflectivity for brighter images compared to standard aluminum.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e50mm Secondary Mirror:\u003c\/strong\u003e A precisely sized secondary provides full illumination for visual use and smaller imaging sensors without excessive obstruction.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCertified Performance:\u003c\/strong\u003e The included Zygo test report documents the exact wavefront error of your specific mirror, removing all ambiguity about its performance.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eZero-Expansion Carbon Fibre Tube: A 1440mm Stable Optical Platform\u003c\/h3\u003e\n      \u003cp\u003eTo maintain the precision of its optics, the CT10L employs a sandwich-construction carbon fibre tube. This material exhibits virtually zero thermal expansion, preventing the focal point from shifting during long imaging sessions or nights with dropping temperatures. The 300mm diameter tube is finished with a gloss exterior and a matte black interior to absorb stray light and maximize image contrast.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n    \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eImaging-Ready Mechanics: 9-Point Cell and 2-inch Geared Focuser\u003c\/h3\u003e\n      \u003cp\u003eThe mechanical systems of the CT10L are engineered to support the optical performance. The primary mirror rests on a 9-point flotation cell, CNC machined from aluminum to prevent any print-through or astigmatism from mechanical stress. An integrated fan provides active cooling to help the mirror reach thermal equilibrium quickly.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003e2-inch Geared Focuser:\u003c\/strong\u003e A precision-machined 2-inch focuser with reduction gearing allows for smooth, fine adjustments critical for achieving sharp focus at high magnification.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCNC Tube Rings:\u003c\/strong\u003e A pair of solid, black-anodised CNC machined rings weighing 1.5kg provide a secure and stable mounting platform for the 12.5kg tube.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eAdjustable Spider:\u003c\/strong\u003e The stainless steel 4-vane spider is fully adjustable, allowing for precise secondary mirror collimation to maintain optical alignment.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eThe 1\/10 PV Difference: Visualizing Research-Grade Optics\u003c\/h3\u003e\n      \u003cp\u003eWhile a standard 1\/4 PV wavefront optic produces good images, the 1\/10 PV wavefront correction of the CT10L elevates views from good to exceptional. This level of accuracy concentrates more light into the central Airy disk of a star, resulting in visibly higher contrast on planetary details, tighter star points, and the ability to resolve fainter, closer double stars. Under steady seeing conditions, a 1\/10 PV optic delivers an image that is fundamentally sharper and more detailed than what a lesser mirror can physically produce.\u003c\/p\u003e\n      \u003cdiv class=\"DAV-comparison-grid\"\u003e\n        \u003cdiv class=\"DAV-comparison-item\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_4-PV.jpg\" alt=\"Saturn viewed through a 1\/4 PV wavefront telescope\"\u003e\n          \u003cp\u003e1\/4 PV (Standard)\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"DAV-comparison-item\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through a 1\/10 PV wavefront telescope\"\u003e\n          \u003cp\u003e1\/10 PV (CT Series)\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the CT10L's 1\/10 PV wavefront accuracy mean for viewing Jupiter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor an object like Jupiter, the \u003cstrong\u003e1\/10 PV wavefront\u003c\/strong\u003e accuracy of the Orion Optics CT10L translates directly to higher contrast and finer detail. You will be able to more clearly resolve subtle cloud bands, festoons, and small ovals, as well as fine detail within the Great Red Spot. The superior correction minimizes light scatter, making the planet's moons appear as sharp, distinct disks rather than fuzzy points of light during moments of excellent atmospheric seeing.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the carbon fibre tube on the CT10L benefit long-exposure astrophotography?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary benefit is \u003cstrong\u003efocal stability\u003c\/strong\u003e. Metal tubes expand and contract with temperature changes, causing the focal point to shift and resulting in soft or bloated stars over a long imaging session. The CT10L's carbon fibre sandwich tube has virtually zero thermal expansion, meaning your focus will remain sharp from the beginning of the night to the end without constant adjustments.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the CT10L's f\/6.3 focal ratio suitable for both visual and imaging?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, f\/6.3 is an excellent compromise. For visual observers, it's fast enough to provide bright, wide-field views with low-power eyepieces but slow enough to be very forgiving on eyepiece designs, delivering sharp stars across the field. For imagers, the \u003cstrong\u003e1575mm focal length\u003c\/strong\u003e provides ample image scale for galaxies, planetary nebulae, and planets without requiring extreme seeing conditions.\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 Orion Optics CT10L?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe CT10L optical tube weighs \u003cstrong\u003e12.5kg\u003c\/strong\u003e and the rings add another \u003cstrong\u003e1.5kg\u003c\/strong\u003e, for a total of 14kg. For visual use, a mount with a payload capacity of at least 18kg (40 lbs) is recommended. For serious astrophotography, a mount in the 22kg (50 lbs) payload class or higher is essential to handle the tube's 1440mm length and provide the necessary stability for sharp, long exposures.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWith its 250mm aperture, can the CT10L resolve globular clusters like the Hercules Cluster (M13)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. A \u003cstrong\u003e250mm\u003c\/strong\u003e aperture has significant light-gathering and resolving power. On a target like M13, the CT10L will resolve the dense core into a field of thousands of individual pin-point stars. The 1\/10 PV optics ensure these stars are as sharp as the seeing will permit, creating a stunning, three-dimensional visual experience.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a Zygo report included with the CT10L?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Zygo interferometer report is your \u003cstrong\u003ecertificate of optical quality\u003c\/strong\u003e. It is a printout from a high-precision laser measurement device that shows the exact surface accuracy of your specific primary mirror. Including this report demonstrates that the advertised 1\/10 PV wavefront specification is not just a marketing claim but a measured, verifiable fact for the instrument you receive.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/10 PV Wavefront Standard\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e250mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1575mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.3\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Glass\u003c\/td\u003e\n\u003ctd\u003eSuprax\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced Hilux\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon Fibre Sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1440mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e12.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003e9-point suspension, CNC machined aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSpider\u003c\/td\u003e\n\u003ctd\u003e4-vane, stainless steel, fully adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFinder Scope\u003c\/td\u003e\n\u003ctd\u003e8x50\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMounting Rings\u003c\/td\u003e\n\u003ctd\u003eCNC machined, anodised black\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRings Weight\u003c\/td\u003e\n\u003ctd\u003e1.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eExtension Tubes\u003c\/td\u003e\n\u003ctd\u003e40mm, screw threaded\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBoxed Dimensions\u003c\/td\u003e\n\u003ctd\u003e172 x 48 x 48 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBoxed Weight\u003c\/td\u003e\n\u003ctd\u003e20kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eCT10L 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    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003e8x50 Finder Scope\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eCNC Machined Tube Rings\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003e40mm Extension Tube\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eZygo Interferometry Test Report\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\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":52942379614493,"sku":"OOUK-CT10L-OPTICAL-TUBE-ASSEMBLY","price":6324.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_ad896c08-c553-4fdd-8058-8eccf68d8f26.jpg?v=1789607197"},{"product_id":"orion-optics-uk-ct12-optical-tube-assembly","title":"Orion Optics UK CT12 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e300mm (12\") Aperture f\/4 Newtonian Reflector\u003c\/li\u003e\n\u003cli\u003e1200mm Focal Length\u003c\/li\u003e\n\u003cli\u003eCertified 1\/10 PV Wavefront Primary Mirror\u003c\/li\u003e\n\u003cli\u003eCarbon Fiber Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e9-Point CNC-Machined Flotation Mirror Cell\u003c\/li\u003e\n\u003cli\u003e2\" Dual-Speed 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 CT12 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK CT12 combines a fast f\/4 optical system with a massive 300mm aperture, built around a primary mirror hand-figured to a 1\/10 PV wavefront accuracy. Housed in a thermally stable carbon fiber sandwich tube measuring 1100mm long, this OTA is engineered for high-resolution planetary and deep-sky imaging where optical perfection is paramount. The 17kg assembly is supported by a 9-point flotation cell and CNC-machined rings, delivering a rigid and precise platform for capturing the finest details the night sky has to offer.\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\u003eUltra-Grade 1\/10 PV Wavefront Optics: The CT12's Defining Feature\u003c\/h3\u003e\n\u003cp\u003eThe heart of the CT12 is its 300mm Suprax primary mirror, which comes standard with Orion Optics UK's highest possible optical grade: 1\/10 Peak-to-Valley (PV) wavefront. This isn't an optional upgrade; it's the baseline for the CT series. This level of precision, verified by an included Zygo laser interferometer report, ensures that the telescope delivers the sharpest, highest-contrast images physically possible, limited only by atmospheric seeing.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/10 PV Wavefront Standard:\u003c\/strong\u003e Represents the pinnacle of mirror figuring, minimizing scattered light and maximizing fine detail on challenging targets like planetary cloud bands and tight double stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Hilux Coatings:\u003c\/strong\u003e Provide superior reflectivity for brighter images and increased contrast, crucial for pulling faint deep-sky objects out of the background sky.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZygo Test Report Included:\u003c\/strong\u003e Every CT12 ships with its own interferometry data, providing absolute proof of the primary mirror's exceptional quality and giving you full confidence in your instrument's capabilities.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eVisualizing the 1\/10 PV Advantage on High-Resolution Targets\u003c\/h3\u003e\n\u003cp\u003eA 1\/10 PV wavefront isn't just a number—it translates directly to superior performance at the eyepiece and sensor. Compared to standard 1\/4 PV or even upgraded 1\/6 PV optics, the near-perfect surface of the CT12's mirror concentrates more light into the central Airy disk of a star's image. This results in visibly higher contrast on low-contrast planetary features, like the subtle banding on Saturn or the Cassini Division in its rings, especially during moments of steady seeing.\u003c\/p\u003e\n\u003cdiv class=\"DAV-image-grid\"\u003e\n  \u003cdiv class=\"DAV-image-grid-item\"\u003e\n\u003cimg alt=\"Saturn view through 1\/4 PV optics\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_4-PV.jpg\"\u003e\n  \u003cp\u003e1\/4 PV (Standard)\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"DAV-image-grid-item\"\u003e\n\u003cimg alt=\"Saturn view through 1\/6 PV optics\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\"\u003e\n  \u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"DAV-image-grid-item\"\u003e\n\u003cimg alt=\"Saturn view through 1\/8 PV optics\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\"\u003e\n  \u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"DAV-image-grid-item\"\u003e\n\u003cimg alt=\"Saturn view through 1\/10 PV optics\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\"\u003e\n  \u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\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 \u0026amp; 9-Point Cell: Stability for f\/4 Imaging\u003c\/h3\u003e\n\u003cp\u003eAt a fast f\/4 focal ratio, maintaining precise focus is critical. The CT12's carbon fiber sandwich tube, with a 350mm diameter, offers near-zero thermal expansion. This ensures the 1200mm focal length remains constant as temperatures drop overnight, eliminating the need for constant refocusing during an imaging session. The 300mm primary mirror is supported by a CNC-machined 9-point flotation cell, which prevents gravitational distortion and includes a fan for rapid thermal stabilization.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero-Expansion Tube:\u003c\/strong\u003e The carbon fiber construction maintains focus stability, a non-negotiable requirement for serious astrophotography with a fast optical system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9-Point Flotation Cell:\u003c\/strong\u003e Distributes the mirror's weight evenly to preserve its precise 1\/10 PV figure, regardless of the telescope's orientation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive Cooling:\u003c\/strong\u003e An integrated fan accelerates the cooling of the primary mirror to match ambient temperature, reducing tube currents and sharpening the image faster.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePrecision 2\" Focuser and 8x50 Finder: Critical Imaging Components\u003c\/h3\u003e\n\u003cp\u003eThe CT12 is equipped with components that match the quality of its optics. The 2\" focuser features reduction gearing for fine focus adjustments, essential for achieving sharp stars with a modern imaging sensor. For visual target acquisition, a high-quality 8x50 finder scope is included, providing a bright, wide field of view to easily locate objects before switching to the main eyepiece or camera.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Speed Focuser:\u003c\/strong\u003e Allows for rapid coarse focusing and then extremely fine adjustments, critical for locking in perfect focus with the narrow focal zone of an f\/4 system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8x50 Finder:\u003c\/strong\u003e A substantial finder that gathers enough light to show many deep-sky objects directly, making star-hopping intuitive and fast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded 40mm Extension Tube:\u003c\/strong\u003e Ensures that a wide range of eyepieces and cameras can reach focus without requiring additional accessories.\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 CT12's 1\/10 PV wavefront specification so important for planetary imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor planetary imaging, contrast is everything. A \u003cstrong\u003e1\/10 PV wavefront\u003c\/strong\u003e mirror minimizes light scatter, which directly increases the contrast of fine, low-contrast details like Jupiter's cloud belts, the Great Red Spot, or subtle features on Mars. This higher precision allows you to push magnification further during moments of good seeing and resolve details that would be smeared out by optics with a lower PV rating.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the CT12's f\/4 focal ratio affect imaging of deep-sky objects like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe fast \u003cstrong\u003ef\/4 focal ratio\u003c\/strong\u003e allows the CT12 to capture photons at a much faster rate than an f\/8 or f\/10 system. When imaging a large, bright target like the Orion Nebula (M42), this means you can collect the same amount of data in significantly shorter sub-exposures. This reduces demands on your mount's tracking accuracy and allows you to build up a deep, high-signal image more efficiently.\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 17kg CT12 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an approximate tube weight of \u003cstrong\u003e17kg\u003c\/strong\u003e (plus 2kg for rings and additional weight for a camera and guide scope), the CT12 requires a substantial equatorial mount with a high payload capacity. For imaging, you should look for a mount rated for at least 25-30kg to ensure stability and precise tracking. Mounts in the EQ6-R Pro, CGX, or higher class are recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the carbon fiber tube on the CT12 really prevent focus shift during temperature changes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Carbon fiber has an extremely low coefficient of thermal expansion, especially compared to aluminum or steel tubes. This means that as the ambient temperature drops throughout the night, the \u003cstrong\u003e1100mm tube\u003c\/strong\u003e will not shrink, keeping the distance between the primary mirror and the focuser constant. This maintains a stable focal plane, which is critical for long imaging sessions at f\/4 where the depth of focus is very shallow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to add to the CT12 to start observing or imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe CT12 is an Optical Tube Assembly (OTA) and requires several key components to be operational. You will need:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA suitable equatorial mount (see above).\u003c\/li\u003e\n\u003cli\u003eAt least one 2\" or 1.25\" eyepiece for visual observation (none are included).\u003c\/li\u003e\n\u003cli\u003eA collimation tool (essential for a fast Newtonian).\u003c\/li\u003e\n\u003cli\u003eA 12V power supply for the mirror's cooling fan.\u003c\/li\u003e\n\u003cli\u003eAn astronomy camera and any necessary adapters if you plan to do astrophotography.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the CT12 for high-magnification views of Jupiter in my light-polluted backyard?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The CT12's large \u003cstrong\u003e300mm aperture\u003c\/strong\u003e provides incredible light-gathering power and high potential resolution. Light pollution primarily affects faint deep-sky objects, but bright targets like Jupiter are largely immune. The limiting factor for planetary viewing is atmospheric seeing, not light pollution. On a night with steady air, the 1\/10 PV optics will deliver exceptionally sharp and detailed views of Jupiter's atmospheric bands and its Galilean moons.\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 Quality\u003c\/td\u003e\n\u003ctd\u003e1\/10 PV wavefront (Standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Glass\u003c\/td\u003e\n\u003ctd\u003eSuprax\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced Hilux\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinder Scope\u003c\/td\u003e\n\u003ctd\u003e8x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e17kg (approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003e9-point suspension, CNC machined aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpider\u003c\/td\u003e\n\u003ctd\u003e4-vane stainless steel, fully adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Holder\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminum, rotatable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Rings\u003c\/td\u003e\n\u003ctd\u003eCNC machined, anodised black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRings Weight\u003c\/td\u003e\n\u003ctd\u003e2kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtension Tube\u003c\/td\u003e\n\u003ctd\u003e40mm, screw threaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoxed Dimensions\u003c\/td\u003e\n\u003ctd\u003eBox 1: 128x52x52mm, Box 2: 58x58x34mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoxed Weight\u003c\/td\u003e\n\u003ctd\u003eBox 1: 14kg, Box 2: 12kg\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\"\u003eCT12 f\/4 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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCNC Machined Tube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e8x50 Finder Scope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eZygo Interferometry Test Report\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":52942380237085,"sku":"OOUK-CT12-OPTICAL-TUBE-ASSEMBLY","price":5702.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_96e87270-bbce-4f23-845d-a9a4f25223af.jpg?v=1789607205"},{"product_id":"orion-optics-uk-ct12l-optical-tube-assembly","title":"Orion Optics UK CT12L Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e300mm (12\") Aperture\u003c\/li\u003e\n\u003cli\u003e1590mm Focal Length, f\/5.3 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eStandard 1\/10 PV Wavefront Optics\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e2\" Focuser with Reduction Gearing\u003c\/li\u003e\n\u003cli\u003e9-Point CNC Machined Mirror Cell\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 CT12L Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK CT12L is an imaging-first Newtonian built around a 300mm primary mirror hand-figured to a 1\/10 PV wavefront standard. Its 1590mm focal length delivers an f\/5.3 ratio, ideal for resolving fine detail on planets and capturing faint structures in deep-sky objects. The entire optical system is housed in a 1450mm carbon fibre sandwich tube weighing approximately 20kg, ensuring thermal stability and maintaining a precise focal plane through long imaging sessions.\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\u003eUltra-Grade 1\/10 PV Optics: The Foundation of the 300mm System\u003c\/h3\u003e\n\u003cp\u003eThe heart of the CT12L is its 300mm Suprax primary mirror, which comes standard with Orion Optics UK's highest optical certification: a 1\/10 PV wavefront accuracy. This is not an optional upgrade but the baseline for the CT series, ensuring the highest possible contrast and sharpness. The mirror features Enhanced Hilux coatings for maximum reflectivity, and its performance is documented by an included Zygo interferometry report, providing empirical proof of its quality.\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 Fibre Tube: 1450mm of Thermally Stable Engineering\u003c\/h3\u003e\n\u003cp\u003eTo maintain the performance of its elite optics, the CT12L employs a carbon fibre sandwich tube. This advanced material has a near-zero coefficient of thermal expansion, preventing the 1590mm focal length from shifting as ambient temperature changes. The 350mm diameter tube is finished with a gloss exterior and a matte black interior to suppress stray light, providing a high-contrast backdrop for both visual observation and astrophotography.\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\u003ePrecision Mechanics: A 9-Point Cell and 2-inch Geared Focuser\u003c\/h3\u003e\n\u003cp\u003eThe CT12L's optical performance is supported by a robust mechanical framework. The primary mirror rests on a CNC machined 9-point flotation cell that prevents flexure and is aided by a fan for rapid thermal equalization. Up front, the 63mm secondary mirror is held by a fully adjustable, stainless steel 4-vane spider, while the 2-inch focuser with reduction gearing allows for the precise, repeatable focus adjustments necessary at an f\/5.3 focal ratio.\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\/10 PV Difference: Visualizing Optical Accuracy\u003c\/h3\u003e\n\u003cp\u003eOrion Optics UK offers several grades of optical accuracy, but the CT12L includes their finest 1\/10 PV grade as standard. Compared to a common 1\/4 PV \"diffraction-limited\" mirror, a 1\/10 PV surface delivers a wavefront that is significantly closer to a perfect parabola. In practice, this translates to visibly higher contrast on planetary details like Jupiter's cloud bands, tighter star points, and the ability to resolve fainter, more subtle nebulosity that would be lost in the noise of a less accurate system.\u003c\/p\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 does the 1\/10 PV wavefront rating on the CT12L mean for observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e1\/10 Peak-to-Valley (PV) wavefront\u003c\/strong\u003e rating means the surface of the 300mm primary mirror deviates from a perfect parabola by no more than 1\/10th of a wavelength of light. This is an extremely high standard of accuracy that results in superior image contrast and sharpness. For you, the observer, this means seeing finer details on planets, resolving tighter double stars, and capturing more delicate structures in nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the CT12L's carbon fiber tube benefit astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe carbon fiber tube has a near-zero thermal expansion coefficient. During a long imaging session, as temperatures drop overnight, a metal tube will contract and slightly change the focal length, causing images to lose focus. The \u003cstrong\u003eCT12L's 1450mm carbon fiber tube\u003c\/strong\u003e remains dimensionally stable, keeping the focal plane locked and ensuring your images remain sharp from the beginning of the night to the end without constant refocusing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the CT12L's 20kg weight manageable for a portable setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAt approximately \u003cstrong\u003e20kg for the tube and 2kg for the rings\u003c\/strong\u003e, the CT12L is a substantial instrument. While it can be transported to a dark sky site, it is not a grab-and-go telescope. It requires a robust equatorial mount and is best suited for a semi-permanent or observatory setup where its weight can be managed safely.\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 Orion Optics CT12L OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a combined weight of over 22kg (48.5 lbs) for the OTA and rings, plus the added weight of a camera, guide scope, and other accessories, you will need a heavy-duty equatorial mount. A mount with a rated payload capacity of at least 60-70 lbs is recommended to ensure stability for long-exposure astrophotography with the CT12L's 1590mm focal length.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the CT12L's f\/5.3 optics perform on faint galaxies like the Leo Triplet?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe CT12L's combination of a large \u003cstrong\u003e300mm aperture\u003c\/strong\u003e and a fast \u003cstrong\u003ef\/5.3 focal ratio\u003c\/strong\u003e is excellent for galaxy clusters. The large aperture gathers significant light to reveal faint extensions and dust lanes in galaxies like M65 and M66, while the 1\/10 PV optics ensure that the faint signal is rendered with maximum contrast against the sky background, making subtle details more visible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat level of detail can I expect on Saturn with the CT12L's 300mm, 1\/10 PV mirror?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUnder steady seeing conditions, the \u003cstrong\u003e300mm aperture and 1\/10 PV optics\u003c\/strong\u003e of the CT12L will provide exceptional planetary views. On Saturn, you can expect to clearly resolve the Cassini Division, subtle cloud banding on the planet's disk, and potentially the Encke Gap with excellent seeing. The high-contrast optics will also make it easier to pick out Saturn's fainter moons against the glare of the rings.\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\u003eOptics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/10 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1590mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror\u003c\/td\u003e\n\u003ctd\u003eSuprax with Enhanced Hilux Coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e63mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinder Scope\u003c\/td\u003e\n\u003ctd\u003e8x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1450mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e20kg (approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003e9-point suspension, CNC machined aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpider\u003c\/td\u003e\n\u003ctd\u003e4-vane, stainless steel, fully adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Holder\u003c\/td\u003e\n\u003ctd\u003eMachined aluminum, rotatable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRings\u003c\/td\u003e\n\u003ctd\u003eCNC machined tube rings, anodised black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRings Weight\u003c\/td\u003e\n\u003ctd\u003e2kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtension Tubes\u003c\/td\u003e\n\u003ctd\u003e40mm long, screw threaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoxed Dimensions\u003c\/td\u003e\n\u003ctd\u003eBox 1: 172x58x58mm, Box 2: 58x58x34mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoxed Weight\u003c\/td\u003e\n\u003ctd\u003eBox 1: 18.5kg, Box 2: 12kg\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\"\u003eCT12L 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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e8x50 Finder Scope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCNC Machined Tube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e40mm Extension Tube\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eZygo Interferometry Test Report\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":52942380335389,"sku":"OOUK-CT12L-OPTICAL-TUBE-ASSEMBLY","price":6427.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_e05da382-d3e9-442f-8edc-fcc9182420bb.jpg?v=1789607213"},{"product_id":"orion-optics-uk-ct14-optical-tube-assembly","title":"Orion Optics UK CT14 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e350mm (14\") Aperture\u003c\/li\u003e\n\u003cli\u003e1600mm Focal Length (f\/4.6)\u003c\/li\u003e\n\u003cli\u003eGuaranteed 1\/10 PV Wavefront Optics\u003c\/li\u003e\n\u003cli\u003eCarbon Fibre Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e26kg Optical Tube Weight\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\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 CT14 Optical Tube Assembly\u003c\/h2\u003e\n      \u003cp\u003eThe Orion Optics UK CT14 Optical Tube Assembly combines a massive 350mm aperture with a fast 1600mm (f\/4.6) focal length, all built around a primary mirror hand-figured to a guaranteed 1\/10 PV wavefront accuracy. This instrument is engineered for ultimate imaging stability, featuring a zero-expansion carbon fibre sandwich tube that maintains focus through changing temperatures. Weighing approximately 26kg, the CT14 delivers research-grade optical performance for serious planetary and deep-sky astrophotographers.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003e1\/10 PV Wavefront Optics: The CT14's Hand-Figured 350mm Primary\u003c\/h3\u003e\n      \u003cp\u003eThe heart of the CT14 is its 350mm Suprax primary mirror, which is not just machine-polished but hand-finished to an exceptional 1\/10 PV wavefront standard. This figure represents the peak-to-valley error across the optical surface, and 1\/10th wave is the highest grade Orion Optics UK produces. This level of precision, verified by an included Zygo interferometer report, ensures that the maximum amount of light is concentrated into the smallest possible point, yielding incredibly sharp, high-contrast images of planets and tight stellar fields.\u003c\/p\u003e\n        \u003cul\u003e\n            \u003cli\u003e\n\u003cstrong\u003eEnhanced Hilux Coatings:\u003c\/strong\u003e The primary and secondary mirrors feature high-reflectivity Hilux coatings to maximize light transmission for brighter views of faint deep-sky objects.\u003c\/li\u003e\n            \u003cli\u003e\n\u003cstrong\u003e82mm Secondary Mirror:\u003c\/strong\u003e The optimized secondary mirror provides excellent field illumination for large-sensor cameras without excessive obstruction.\u003c\/li\u003e\n        \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eZero-Expansion Carbon Fibre Tube and 9-Point Mirror Cell\u003c\/h3\u003e\n      \u003cp\u003eOptical precision requires mechanical stability. The CT14's 400mm diameter tube is a sandwich-construction carbon fibre design with virtually zero thermal expansion, ensuring the 1600mm focal length remains constant as temperatures drop. The primary mirror is supported by a CNC machined, 9-point flotation cell that prevents flexure and astigmatism as the 26kg tube moves across the sky.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eActive Cooling:\u003c\/strong\u003e The mirror cell includes an integrated fan system that can be run continuously to speed up thermal equalization, minimizing tube currents and ensuring the optics perform at their peak from the start of your session.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCNC Tube Rings:\u003c\/strong\u003e A pair of heavy-duty, CNC-machined tube rings weighing 3kg provides a rigid and secure mounting platform for this large-aperture instrument.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003ePrecision 2\" Focuser and 8x50 Finder\u003c\/h3\u003e\n      \u003cp\u003eThe CT14 is equipped with a high-quality 2\" rack and pinion focuser with reduction gearing for fine focus control, critical for achieving sharp results at f\/4.6. A 40mm threaded extension tube is included for reaching focus with a variety of cameras and eyepieces. For locating targets, a straight-through 8x50 achromatic finder scope is fitted to the tube, providing bright, wide-field views to complement the main telescope's narrow, high-magnification field.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eBeyond Diffraction-Limited: Why the CT14's 1\/10 PV Standard Matters\u003c\/h3\u003e\n      \u003cp\u003eMany telescopes are advertised as \"diffraction-limited,\" which corresponds to a 1\/4 PV wavefront accuracy. The CT14's 1\/10 PV standard is significantly more precise, a difference that becomes obvious when observing planets at high magnification. The improved surface accuracy reduces scattered light and sharpens fine details, rendering more subtle cloud bands on Jupiter and cleaner divisions in Saturn's rings. For the CT14, this research-grade figure isn't an expensive upgrade—it's the baseline.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the Orion Optics UK CT14's 1\/10 PV wavefront accuracy mean for imaging Jupiter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor a target like Jupiter, the CT14's \u003cstrong\u003e1\/10 PV wavefront optics\u003c\/strong\u003e minimize light scatter, which directly translates to higher contrast. You will resolve finer, more delicate details in the cloud bands, see more intricate structure within the Great Red Spot, and achieve a sharper overall image compared to a standard 1\/4 PV (\"diffraction-limited\") mirror of the same 350mm aperture.\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 CT14 Optical Tube?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe CT14 optical tube weighs approximately \u003cstrong\u003e26kg\u003c\/strong\u003e, and the rings add another \u003cstrong\u003e3kg\u003c\/strong\u003e, for a total of 29kg before adding a camera, guide scope, or other accessories. You will need a high-capacity German equatorial mount with a payload rating of at least 45kg (100 lbs) for stable imaging performance.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the f\/4.6 focal ratio of the CT14 require a coma corrector for astrophotography?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. Like all fast Newtonian telescopes, the CT14 will exhibit coma at the edges of the field, especially with larger camera sensors. To achieve sharp, point-like stars across the entire frame, using a high-quality coma corrector designed for f\/4.6 systems is essential for astrophotography.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the CT14's carbon fibre tube benefit long-exposure imaging?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003ecarbon fibre sandwich\u003c\/strong\u003e construction has a near-zero coefficient of thermal expansion. This means as the ambient temperature drops during an imaging session, the \u003cstrong\u003e1430mm\u003c\/strong\u003e tube will not shrink. This keeps the focal plane stable, preventing focus shift and ensuring your images remain sharp throughout the night without constant refocusing.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the CT14's 9-point mirror cell?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA large \u003cstrong\u003e350mm\u003c\/strong\u003e primary mirror is heavy and can deform under its own weight if not properly supported. The \u003cstrong\u003e9-point suspension mirror cell\u003c\/strong\u003e distributes the weight of the mirror evenly across nine optimized points. This prevents gravitational sagging and flexure as the telescope points to different parts of the sky, preserving the mirror's precise 1\/10 PV figure and preventing optical aberrations like astigmatism.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Orion Optics UK CT14 for visual observation of the Veil Nebula (NGC 6960)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. The CT14's large \u003cstrong\u003e350mm\u003c\/strong\u003e aperture is exceptional for visual deep-sky observing. When paired with a wide-field 2\" eyepiece and a quality O-III filter, the Veil Nebula will show stunning, intricate filamentary detail. The fast \u003cstrong\u003ef\/4.6\u003c\/strong\u003e focal ratio provides a bright image, making it a powerful instrument for hunting down faint nebulae and galaxies.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1600mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.6\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eStandard Optics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/10 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Glass\u003c\/td\u003e\n\u003ctd\u003eSuprax\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced Hilux\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e82mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1430mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e26kg approx.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" focuser with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eExtension Tubes\u003c\/td\u003e\n\u003ctd\u003e40mm long, screw threaded\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFinder Scope\u003c\/td\u003e\n\u003ctd\u003e8x50\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSpider\u003c\/td\u003e\n\u003ctd\u003eAdjustable 4-vane, stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC machined aluminium, 9 point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSecondary Holder\u003c\/td\u003e\n\u003ctd\u003eMachined aluminium, rotatable\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMounting Rings\u003c\/td\u003e\n\u003ctd\u003eCNC machined tube rings, anodised black\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWeight of Rings\u003c\/td\u003e\n\u003ctd\u003e3kg\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBoxed Dimensions\u003c\/td\u003e\n\u003ctd\u003eBox 1: 172x58x58mm, Box 2: 58x58x34mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBoxed Weight\u003c\/td\u003e\n\u003ctd\u003eBox 1: 20kg, Box 2: 14kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\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":52942380433693,"sku":"OOUK-CT14-OPTICAL-TUBE-ASSEMBLY","price":9373.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_b64200b7-8fb9-4862-8722-a8cb7101fa00.jpg?v=1789607222"},{"product_id":"orion-optics-uk-ct16-optical-tube-assembly","title":"Orion Optics UK CT16 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e400mm (16\") Aperture\u003c\/li\u003e\n\u003cli\u003e1600mm Focal Length (f\/4)\u003c\/li\u003e\n\u003cli\u003e1\/10 PV Wavefront Standard Optics\u003c\/li\u003e\n\u003cli\u003eCarbon Fiber Sandwich Tube Construction\u003c\/li\u003e\n\u003cli\u003e36kg Optical Tube Weight\u003c\/li\u003e\n\u003cli\u003e9-Point CNC Machined Mirror Cell\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 CT16 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK CT16 is an observatory-class imaging instrument built around a hand-figured, 400mm f\/4 primary mirror guaranteed to a 1\/10 PV wavefront accuracy. Paired with a thermally inert carbon fiber sandwich tube and a 9-point flotation cell, its 1600mm focal length is engineered to deliver maximum resolution and contrast on the most demanding deep-sky and planetary targets. Weighing approximately 36kg, the CT16 OTA combines massive light-gathering power with the optical precision required for serious astrophotography.\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\/10 PV Wavefront Optics: The Foundation of CT16's Imaging Power\u003c\/h3\u003e\n\u003cp\u003eThe heart of the CT16 is its Suprax primary mirror, finished to Orion Optics UK's highest \"Ultra\" grade of 1\/10 PV wavefront. This isn't an optional upgrade; it's the standard for the entire CT line, ensuring that the optical system delivers virtually perfect images. Each mirror's performance is verified by a Zygo laser interferometer, and a report is supplied with the telescope, providing absolute confidence in its quality.\u003c\/p\u003e\n\u003cp\u003eThis level of precision means that the maximum and minimum deviation from a perfect parabolic wavefront is incredibly small. The result is exceptionally high contrast that resolves subtle details in galactic dust lanes and fine banding on gas giants, free from the image degradation caused by lower-quality optics.\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 \u0026amp; 9-Point Cell: Engineering for Stability\u003c\/h3\u003e\n\u003cp\u003eAt an aggressive f\/4 focal ratio, maintaining precise focus is critical. The CT16's tube is a sandwich-construction carbon fiber design with a 450mm diameter, providing extreme rigidity and near-zero thermal expansion. This ensures the 1600mm focal plane remains locked in place as temperatures change, eliminating a common source of image drift during long imaging sessions.\u003c\/p\u003e\n\u003cp\u003eThe 400mm primary mirror is supported by a CNC machined, 9-point suspension cell that prevents gravitational flexure as the telescope tracks across the sky. An integrated fan system provides active cooling, allowing the massive mirror to reach thermal equilibrium quickly for stable, sharp views from the start of your session.\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\u003e400mm Aperture at f\/4: A Deep-Sky Imaging Powerhouse\u003c\/h3\u003e\n\u003cp\u003eWith a 400mm (16\") aperture, the CT16 gathers an immense amount of light, making it ideal for capturing faint nebulae and distant galaxies. The fast f\/4 focal ratio allows you to collect significant signal in shorter sub-exposure times, reducing demands on your mount's tracking and minimizing noise. This combination of light grasp and speed makes the CT16 a formidable tool for advanced deep-sky imaging.\u003c\/p\u003e\n\u003cp\u003eThe optical path includes a 90mm secondary mirror held by a fully adjustable, stainless steel 4-vane spider. This setup is optimized for wide-field imaging, providing even illumination across large camera sensors with the addition of an appropriate coma corrector.\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\u003eImaging-Ready Components: 2\" Focuser and 8x50 Finder\u003c\/h3\u003e\n\u003cp\u003eThe CT16 is equipped with a precision 2\" Crayford-style focuser featuring reduction gearing for fine adjustments. This allows for critical focusing accuracy, essential for extracting the maximum detail the 1\/10 PV optics can deliver. The focuser has the back-focus and load-bearing capacity to handle modern imaging trains, including filter wheels and off-axis guiders.\u003c\/p\u003e\n\u003cp\u003eFor initial alignment and target acquisition, a high-quality 8x50 achromatic finder scope is included. The entire optical tube is secured by a pair of CNC machined tube rings, which weigh 3.5kg and provide a rigid, stable connection to your mount.\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\/10 PV Advantage: What It Means on Jupiter and M13\u003c\/h3\u003e\n\u003cp\u003eWhile many telescopes use \"diffraction-limited\" optics (typically 1\/4 PV wavefront), the CT16's 1\/10 PV standard offers a tangible leap in image fidelity. On a target like Jupiter, a 1\/4 PV system might show the main equatorial belts clearly, but the 1\/10 PV optic will resolve finer, low-contrast details within those belts, along with delicate festoons and small ovals that would otherwise be smeared out.\u003c\/p\u003e\n\u003cp\u003eFor deep-sky objects, this translates to superior stellar resolution. When viewing the Hercules Cluster (M13), a 1\/10 PV mirror will produce tighter, more point-like stars across the field, allowing you to resolve individual stars deeper into the cluster's dense core. This is the practical benefit of minimizing wavefront error: more light is focused into the central point of a star's image, increasing sharpness and contrast on every object you view.\u003c\/p\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 kind of mount is required for the Orion Optics UK CT16 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe CT16 optical tube weighs approximately \u003cstrong\u003e36kg\u003c\/strong\u003e and the rings add another \u003cstrong\u003e3.5kg\u003c\/strong\u003e, for a total weight of nearly 40kg before adding any imaging equipment. A heavy-duty, observatory-class German Equatorial Mount with a payload capacity of at least 50kg (110 lbs) or more is strongly recommended for stable imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the CT16's 1\/10 PV optics perform on planetary targets like Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 1\/10 PV wavefront accuracy provides exceptionally high contrast, which is critical for planetary observing. On Saturn, this means you will see not just the Cassini Division, but also subtler features like the Encke Gap (in good seeing), low-contrast banding on the planet's globe, and the delicate crepe ring. The image will be sharper and more stable than what a standard 1\/4 PV optic can deliver.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the f\/4 focal ratio of the CT16 good for deep-sky imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, an f\/4 focal ratio is excellent for deep-sky imaging. It is considered a \"fast\" system, allowing you to capture faint details in nebulae and galaxies with shorter exposure times compared to a slower f\/8 or f\/10 system. You will need to pair it with a high-quality coma corrector to ensure sharp stars across the entire field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the carbon fiber tube on the CT16?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe carbon fiber sandwich tube offers two main advantages. First, it has \u003cstrong\u003evirtually zero thermal expansion\u003c\/strong\u003e, which means the focal point does not shift as the temperature changes during the night. This is crucial for maintaining sharp focus over long imaging runs. Second, it provides a very high stiffness-to-weight ratio, ensuring the optical components remain perfectly aligned.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Orion Optics CT16 come with a Zygo test report?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Every CT-range telescope from Orion Optics UK is supplied with a Zygo interferometry report. This document provides a detailed analysis of the primary mirror's surface accuracy, giving you documented proof that it meets the stringent \u003cstrong\u003e1\/10 PV wavefront\u003c\/strong\u003e specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is active cooling important for a 400mm mirror like the one in the CT16?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA large 400mm mirror has significant thermal mass and can take hours to cool to the ambient air temperature. While it's cooling, it creates air currents inside the optical tube (tube seeing) that degrade the image. The integrated fan system on the CT16's 9-point mirror cell actively cools the mirror, drastically reducing this cooldown time so you can achieve sharp, stable images much faster.\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\u003eOptics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/10 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1600mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Glass\u003c\/td\u003e\n\u003ctd\u003eSuprax\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced Hilux\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e90mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" focuser with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinder Scope\u003c\/td\u003e\n\u003ctd\u003e8x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon fibre sandwich\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e450mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1470mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e36kg (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Rings\u003c\/td\u003e\n\u003ctd\u003eCNC machined, anodised black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Rings Weight\u003c\/td\u003e\n\u003ctd\u003e3.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003e9-point suspension, CNC machined aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpider\u003c\/td\u003e\n\u003ctd\u003e4-vane, stainless steel, fully adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Holder\u003c\/td\u003e\n\u003ctd\u003eMachined aluminium, rotatable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Extension Tubes\u003c\/td\u003e\n\u003ctd\u003e40mm long, screw threaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoxed Dimensions\u003c\/td\u003e\n\u003ctd\u003eBox 1: 172x58x58mm, Box 2: 58x58x34mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoxed Weight\u003c\/td\u003e\n\u003ctd\u003eBox 1: 22kg, Box 2: 18kg\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":52942380794141,"sku":"OOUK-CT16-OPTICAL-TUBE-ASSEMBLY","price":10616.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_223e6bb1-751e-40b5-ac62-068e5b4ac278.jpg?v=1789607230"},{"product_id":"orion-optics-uk-ideal-6","title":"Orion Optics UK IDEAL 6 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e150mm (6\") Primary Mirror\u003c\/li\u003e\n\u003cli\u003e750mm Focal Length (f\/5)\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV Wavefront Hand-Figured Optics\u003c\/li\u003e\n\u003cli\u003eLightweight 4.5kg Aluminium Tube\u003c\/li\u003e\n\u003cli\u003eEris 2\" Rack \u0026amp; Pinion Focuser\u003c\/li\u003e\n\u003cli\u003eCNC Machined 9-Point Mirror Cell with 12V Cooling Fan\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 IDEAL 6 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK IDEAL 6 OTA delivers high-contrast planetary and deep-sky views through its hand-figured 150mm f\/5 primary mirror, which is guaranteed to a 1\/6 PV wavefront accuracy. With a nominal focal length of 750mm and a tube weight of only 4.5kg, this Newtonian is built on a foundation of optical precision, verified by a Zygo interferometer report included with every instrument.\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\u003eHand-Figured 1\/6 PV Wavefront Optics: The Orion Optics UK Standard\u003c\/h3\u003e\n\u003cp\u003eUnlike mass-produced optics, the 150mm primary mirror in the IDEAL 6 is hand-finished by a master optician to a certified 1\/6 Peak-to-Valley (PV) wavefront accuracy. This stringent quality standard, verified by Zygo laser interferometry, ensures that the mirror's surface deviates minimally from a perfect parabola. The result is visibly higher contrast and sharper resolution, allowing you to resolve finer details in Jupiter's cloud bands, the Cassini Division in Saturn's rings, and the core of the Hercules Cluster (M13).\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\u003eEngineered for Stability: A 9-Point Cell and 12V Active Cooling\u003c\/h3\u003e\n\u003cp\u003eThe primary mirror is supported by a CNC-machined 9-point suspension cell, which distributes the mirror's weight evenly to prevent flexure and maintain precise collimation as the telescope moves. An integrated 12-volt fan accelerates the cooling of the primary mirror to match the ambient air temperature, minimizing tube currents and delivering stable, sharp images much faster. The entire assembly weighs a manageable 4.5kg, making it compatible with a wide range of portable astronomy 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\u003ePrecision Focusing: The 2\" Eris Rack \u0026amp; Pinion Focuser\u003c\/h3\u003e\n\u003cp\u003eThe IDEAL 6 is equipped with the in-house designed Eris 2\" rack and pinion focuser. This robust focuser provides a solid, shift-free platform for both visual eyepieces and imaging cameras. Its smooth lock mechanism secures your accessories without introducing tilt, ensuring the optical path remains perfectly aligned for critical high-magnification viewing 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\u003eChoosing Your Grade: 1\/6 PV vs. 1\/8 PV and 1\/10 PV Optics\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV optic delivers exceptional views, Orion Optics UK offers optional upgrades to 1\/8 PV and 1\/10 PV for the most demanding observers. Choosing a higher grade of optical accuracy is a direct investment in image fidelity.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/6 PV (Professional):\u003c\/strong\u003e An excellent all-around performer, providing sharp, high-contrast images that surpass mass-market standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/8 PV (Professional):\u003c\/strong\u003e Offers a noticeable increase in fine detail and contrast, making it a preferred choice for serious planetary observers and imagers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/10 PV (Ultra):\u003c\/strong\u003e Represents the pinnacle of optical craftsmanship, delivering the highest possible contrast and resolution the 150mm aperture can achieve, ideal for research-level applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 does \"1\/6 PV wavefront\" mean for the IDEAL 6?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003e1\/6 PV wavefront\u003c\/strong\u003e is a measurement of the primary mirror's surface accuracy. It means the peaks and valleys on the mirror's surface deviate from a perfect parabola by no more than 1\/6th the wavelength of light. This high degree of accuracy, verified by a Zygo interferometer, results in higher image contrast and sharpness compared to standard \"diffraction-limited\" optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the IDEAL 6's f\/5 focal ratio good for both visual and imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the f\/5 focal ratio is a versatile \"sweet spot.\" For visual use, it provides a wide field of view at low power, making it easy to navigate star fields and frame large deep-sky objects. For imaging, its fast focal ratio allows you to collect light quickly, reducing exposure times. Note that like all fast Newtonians, a coma corrector is recommended for astrophotography to ensure sharp stars across the entire frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the IDEAL 6 perform on planets like Jupiter and Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThanks to its guaranteed 1\/6 PV optics, the IDEAL 6 will provide excellent planetary views. You can expect to clearly resolve Jupiter's main cloud belts, the Great Red Spot, and its Galilean moons. On Saturn, the Cassini Division in the rings should be visible, along with subtle cloud banding on the planet itself, assuming good seeing conditions.\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 4.5kg IDEAL 6 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a tube weight of only \u003cstrong\u003e4.5kg\u003c\/strong\u003e, the IDEAL 6 is very lightweight for its aperture. It pairs well with equatorial mounts in the EQ3-2\/CG-4 class for visual observing. For astrophotography, a more robust mount like an EQ5\/CG-5 or HEQ5 is recommended to handle the additional weight of a camera and guide scope and provide better tracking accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the 9-point mirror cell important on the IDEAL 6?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003e9-point suspension cell\u003c\/strong\u003e provides distributed, uniform support for the 150mm primary mirror. This prevents the mirror from sagging under its own weight as the telescope points to different parts of the sky, which would distort the image and ruin its high-quality optical figure. It's a critical component for maintaining the telescope's performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen should I consider upgrading the IDEAL 6 to 1\/8 PV or 1\/10 PV optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou should consider the \u003cstrong\u003e1\/8 PV or 1\/10 PV upgrade\u003c\/strong\u003e if your primary focus is high-resolution planetary or lunar observing and imaging. While the standard 1\/6 PV optic is excellent, the higher grades provide a measurable increase in image contrast and the ability to resolve the finest possible details, making them a worthwhile investment for observers who demand the absolute best performance from their instrument.\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\u003eOptics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront (Professional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Upgrades\u003c\/td\u003e\n\u003ctd\u003e1\/8 PV and 1\/10 PV\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e750mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC machined 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eEris 2\" Rack and Pinion with smooth lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Construction\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e178mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e750mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e4.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Paint\u003c\/td\u003e\n\u003ctd\u003eGalaxy Silver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003e12-volt fan\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\"\u003eIDEAL 6 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":"Professional (1\/6 PV)","offer_id":52942594343197,"sku":"OOUK-IDEAL-6","price":959.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942594375965,"sku":"OOUK-IDEAL-6-1-8-PV","price":1029.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942594408733,"sku":"OOUK-IDEAL-6-1-10-PV","price":1049.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-IDEAL-6-Optical-Tube-Assembly-1_28b49159-cdc6-4684-a890-e579bc27333c.jpg?v=1789608201"},{"product_id":"orion-optics-uk-ideal-6l","title":"Orion Optics UK IDEAL 6L Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e150mm (6\") Newtonian Reflector Optical Tube\u003c\/li\u003e\n\u003cli\u003e1200mm Focal Length at an f\/8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eCertified 1\/6 PV Wavefront Primary Mirror Optics\u003c\/li\u003e\n\u003cli\u003eCNC-Machined 9-Point Suspension Mirror Cell\u003c\/li\u003e\n\u003cli\u003eWeighs a nominal 5kg for easy mounting\u003c\/li\u003e\n\u003cli\u003eIncludes a 12-volt mirror cooling fan\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\u003eIDEAL 6L Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe IDEAL 6L Optical Tube Assembly delivers planetary and lunar views typically reserved for much more expensive instruments. Its 150mm primary mirror is hand-figured to a certified 1\/6 PV wavefront accuracy, set at a native f\/8 focal ratio that excels at high-magnification observation. The entire optical system, weighing a nominal 5kg, is housed in a 1110mm aluminum tube supported by a CNC-machined 9-point mirror cell with 12-volt active cooling.\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 IDEAL 6L's 1\/6 PV Wavefront Primary Mirror\u003c\/h3\u003e\n\u003cp\u003eUnlike mass-produced reflectors, every IDEAL 6L is built around an optic with a guaranteed minimum performance level. The 150mm primary mirror is certified to a 1\/6 Peak-to-Valley (PV) wavefront accuracy, a standard that ensures sharp, high-contrast images free of astigmatism and spherical aberration. Every optic is supplied with its own Zygo laser interferometer report, providing objective proof of its quality—not just a subjective claim.\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\u003eCNC 9-Point Cell, 12V Cooling, and Eris 2\" Focuser\u003c\/h3\u003e\n\u003cp\u003eThe optical quality is maintained by a robust mechanical system. The primary mirror rests on a CNC-machined 9-point suspension cell that provides uniform support, preventing mirror flexure that can degrade image quality as the telescope moves. A built-in 12-volt fan accelerates mirror cooling, reducing tube currents and allowing you to reach thermal equilibrium faster for stable, sharp views.\u003c\/p\u003e\n\u003cp\u003eAt the other end, the in-house designed Eris 2\" rack and pinion focuser provides a solid, stable platform for your eyepieces and cameras. Its smooth-lock mechanism grips accessories securely without introducing tilt, ensuring the optical path remains perfectly aligned even with heavier 2\" eyepieces.\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 IDEAL 6L's f\/8 Advantage: High-Contrast Planetary Viewing\u003c\/h3\u003e\n\u003cp\u003eThe IDEAL 6L's 1200mm focal length results in an f\/8 focal ratio, a deliberate design choice for observers prioritizing detail on the Moon and planets. This slower f-ratio produces a less demanding light cone, which makes collimation easier to achieve and maintain. It also delivers higher contrast and works exceptionally well with simpler eyepiece designs, revealing subtle cloud bands on Jupiter and the Cassini Division in Saturn's rings with clarity.\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\u003eIDEAL 6L: Choosing Between 1\/6, 1\/8, and 1\/10 PV Optics\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV optic is a superb performer, optional upgrades to 1\/8 PV and 1\/10 PV are available for those seeking the ultimate level of optical perfection. The choice depends entirely on your observing goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 1\/6 PV:\u003c\/strong\u003e An excellent grade that delivers sharp, detailed views far exceeding typical commercial standards. Ideal for all-around visual astronomy from deep sky to planets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional 1\/8 PV:\u003c\/strong\u003e A significant step up for dedicated planetary and lunar observers. This level of correction can reveal finer, lower-contrast details during moments of steady seeing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra 1\/10 PV:\u003c\/strong\u003e Represents the pinnacle of Newtonian optics. This grade extracts the maximum possible resolution from the 150mm aperture, for observers who demand the most pristine image possible and have the steady skies to take advantage of it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 kind of mount does the IDEAL 6L OTA require?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a nominal tube weight of \u003cstrong\u003e5kg\u003c\/strong\u003e and a length of \u003cstrong\u003e1110mm\u003c\/strong\u003e, the IDEAL 6L is relatively lightweight but long. It requires an equatorial mount in the EQ5\/CG-5 class or higher to ensure stability, especially for astrophotography or high-magnification viewing where vibrations are more noticeable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the IDEAL 6L's f\/8 design perform on planets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe f\/8 focal ratio is ideal for planetary work. On Jupiter, you can expect to clearly resolve the primary equatorial belts, the Great Red Spot, and shadow transits of the Galilean moons. The high-contrast optics will make it easier to discern subtle color variations and smaller storms within the cloud bands, especially when seeing conditions are good.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is a Zygo interferometer report and why is it included with the IDEAL 6L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA Zygo interferometer is a high-precision instrument that measures the exact shape of a mirror's surface using laser light. The report is a printout of this measurement, providing objective, numerical proof of the mirror's wavefront accuracy (e.g., \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e). It's included to guarantee that your telescope's optics meet the advertised specification, moving beyond subjective claims to verifiable data.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 1\/8 PV or 1\/10 PV upgrade for the IDEAL 6L worth it for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor most observers, the standard \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic is more than sufficient for stunning views. However, if your primary passion is high-resolution planetary, lunar, or double-star observing and you frequently have access to steady skies, the higher-grade optics can provide a noticeable increase in fine detail and contrast. The \u003cstrong\u003e1\/10 PV\u003c\/strong\u003e upgrade is for the observer seeking the absolute theoretical maximum performance from a 150mm aperture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the Eris 2\" focuser on the IDEAL 6L handle a heavy eyepiece or a camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003eEris 2\" rack and pinion focuser\u003c\/strong\u003e is designed for stability. Its rack and pinion mechanism is inherently stronger than many entry-level Crayford focusers, and the \"smooth lock\" feature ensures that once focus is set, it holds firm without slipping or tilting, even with heavier accessories like large wide-field eyepieces or DSLR cameras for planetary imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the 36mm secondary mirror on the IDEAL 6L a good size?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003e36mm\u003c\/strong\u003e secondary mirror creates a central obstruction of 24% by diameter. For a 150mm f\/8 Newtonian, this is an excellent balance, providing a fully illuminated field for visual use without being so large that it significantly reduces image contrast, which is critical for resolving fine planetary detail.\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\u003eOptics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV Wavefront Standard (Upgrades to 1\/8 PV \u0026amp; 1\/10 PV available)\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e36mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eEris 2\" Rack and Pinion with smooth lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror\/Tube Cooling\u003c\/td\u003e\n\u003ctd\u003e12-volt fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Type\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Paint\u003c\/td\u003e\n\u003ctd\u003eGalaxy Silver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e5kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e178mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1110mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThis product is an Optical Tube Assembly (OTA) only. Mount, eyepieces, and other accessories are not included.\u003c\/p\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":"Professional (1\/6 PV)","offer_id":52942595588381,"sku":"OOUK-IDEAL-6L","price":978.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942595621149,"sku":"OOUK-IDEAL-6L-1-8-PV","price":1049.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942595653917,"sku":"OOUK-IDEAL-6L-1-10-PV","price":1068.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-IDEAL-6L-Optical-Tube-Assembly-1_3163e7dc-d29c-45ec-93b4-dc149eabea2c.jpg?v=1789608210"},{"product_id":"orion-optics-uk-ideal-8","title":"Orion Optics UK IDEAL 8 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e200mm (8\") Primary Mirror\u003c\/li\u003e\n\u003cli\u003e900mm Focal Length\u003c\/li\u003e\n\u003cli\u003eFast f\/4.5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eGuaranteed 1\/6 PV Wavefront Standard Optics\u003c\/li\u003e\n\u003cli\u003eCNC-Machined 9-Point Mirror Cell\u003c\/li\u003e\n\u003cli\u003e7kg Nominal Tube Weight\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 IDEAL 8 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK IDEAL 8 combines a fast, 200mm f\/4.5 optical system with a guaranteed 1\/6 PV wavefront primary mirror for exceptional astro-imaging capability. Its 900mm focal length provides a wide field of view, while the entire aluminium tube assembly weighs a manageable 7kg. Every optic is supported by a CNC-machined 9-point suspension cell and includes a Zygo interferometer report certifying its accuracy.\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\u003eGuaranteed 1\/6 PV Wavefront Optics: The Orion Optics UK Difference\u003c\/h3\u003e\n\u003cp\u003eUnlike mass-produced reflectors that often cite a theoretical \"diffraction limited\" standard (equivalent to 1\/4 PV wavefront), every IDEAL 8 OTA comes with a hand-figured primary mirror guaranteed to achieve 1\/6 PV wavefront accuracy. This superior optical quality, verified by an included Zygo interferometer test report, translates directly to higher-contrast planetary views and tighter, more defined stars in deep-sky images. For the most demanding applications, optional upgrades to 1\/8 PV and 1\/10 PV are available.\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\u003eA 200mm f\/4.5 System for Wide-Field Imaging\u003c\/h3\u003e\n\u003cp\u003eWith a 200mm aperture and a fast f\/4.5 focal ratio, the IDEAL 8 is built for capturing large deep-sky objects. This optical speed allows you to gather significant signal in shorter exposure times, reducing demands on your mount's tracking. The 900mm focal length is ideal for framing expansive targets like the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000) with modern astronomy cameras.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocal Ratio (f\/4.5):\u003c\/strong\u003e Reduces exposure time compared to slower f\/6 or f\/8 systems, capturing faint nebulosity more efficiently.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAperture (200mm):\u003c\/strong\u003e Gathers ample light for resolving detail in galaxies and star clusters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComa Correction Trade-Off:\u003c\/strong\u003e Like all fast Newtonians, the IDEAL 8 will show coma at the edge of the field; pairing it with a high-quality coma corrector is essential for achieving sharp stars across the entire imaging sensor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEngineered for Stability: 9-Point Cell, Active Cooling, and Eris Focuser\u003c\/h3\u003e\n\u003cp\u003eThe optical quality is matched by a robust mechanical design. A CNC-machined 9-point suspension cell supports the primary mirror without inducing astigmatism or flexure as the telescope moves. A built-in 12-volt fan accelerates mirror cooling to ambient temperature, minimizing tube currents and ensuring sharp images sooner. The in-house designed Eris 2\" rack and pinion focuser provides a solid, slip-free platform for heavy imaging trains, with a smooth lock mechanism to hold focus securely.\u003c\/p\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 IDEAL 8's 1\/6 PV optics different from standard Newtonians?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eMost standard Newtonians are specified as \"diffraction limited,\" which corresponds to a 1\/4 PV wavefront accuracy. The \u003cstrong\u003eIDEAL 8 guarantees a 1\/6 PV wavefront\u003c\/strong\u003e, a significantly higher standard of optical precision. This is achieved through hand-figuring and is verified with an individual Zygo interferometer report for each mirror, resulting in higher image contrast and sharpness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the f\/4.5 focal ratio of the IDEAL 8 benefit deep-sky imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn f\/4.5 system is considered \"fast,\" meaning it collects light more rapidly than a telescope with a higher f-ratio (like f\/8 or f\/10). For imagers, this means you can achieve the same image brightness in a much shorter exposure time. This reduces the strain on your mount's tracking and allows you to capture more data in a single night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I see a difference between the 1\/6 PV and 1\/10 PV upgrade on a target like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, especially during moments of steady seeing. While the 1\/6 PV standard provides excellent views, upgrading to 1\/10 PV pushes the mirror's surface accuracy to the limit. On a detailed target like Jupiter, this translates to finer, higher-contrast details in the cloud bands and more subtle features becoming visible. The higher the optical quality, the more resilient the image is to atmospheric turbulence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the 9-point mirror cell in the IDEAL 8?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe CNC-machined 9-point cell provides optimal support for the 200mm primary mirror. It distributes the weight of the glass evenly across nine specific points, preventing gravity from deforming the mirror's precise shape as the telescope is aimed at different parts of the sky. This ensures the telescope maintains its collimation and optical performance regardless of its orientation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 7kg weight of the IDEAL 8 OTA manageable for portable mounts?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAt a nominal weight of \u003cstrong\u003e7kg\u003c\/strong\u003e, the IDEAL 8 optical tube is relatively lightweight for its 200mm aperture. This makes it compatible with a wide range of mid-range equatorial mounts (typically those rated for 13-15kg or more for imaging), including many popular portable setups. Always account for the additional weight of your camera, guide scope, and other accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the function of the 12-volt fan on the IDEAL 8?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe integrated 12-volt fan is a crucial feature for thermal management. It actively draws air over the back of the primary mirror, helping it reach the same temperature as the outside air much faster. This process, called thermal equalization, minimizes \"tube currents\"—internal air turbulence that can soften the image—leading to sharper, more stable views.\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\u003eOptics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV Wavefront Standard (Upgrades to 1\/8 PV \u0026amp; 1\/10 PV available)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\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\u003e900mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e63mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eEris 2\" Rack and Pinion with smooth lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003e12-volt fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e7kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e225mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e860mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Finish\u003c\/td\u003e\n\u003ctd\u003eGalaxy Silver\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":"Professional (1\/6 PV)","offer_id":52942596899101,"sku":"OOUK-IDEAL-8","price":1707.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942596931869,"sku":"OOUK-IDEAL-8-1-8-PV","price":1822.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942596964637,"sku":"OOUK-IDEAL-8-1-10-PV","price":1843.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-IDEAL-8-Optical-Tube-Assembly-1_b4c117bd-1387-4576-935c-b3beedbbe56a.jpg?v=1789608219"},{"product_id":"orion-optics-uk-ideal-8l","title":"Orion Optics UK IDEAL 8L Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e200mm Primary Mirror\u003c\/li\u003e\n\u003cli\u003e1200mm Focal Length (f\/6)\u003c\/li\u003e\n\u003cli\u003e1\/6 PV Wavefront Standard Optics\u003c\/li\u003e\n\u003cli\u003eCNC 9-Point Suspension Mirror Cell\u003c\/li\u003e\n\u003cli\u003eEris 2\" Rack and Pinion 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\u003eIDEAL 8L Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe IDEAL 8L Optical Tube Assembly combines a 200mm primary mirror with a 1200mm focal length, creating a versatile f\/6 system for high-resolution planetary views and deep-sky imaging. Each OTA is built around a hand-figured primary mirror guaranteed to a 1\/6 PV wavefront accuracy, supported by a 9-point CNC-machined suspension cell and weighing a manageable 8kg.\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\u003eIDEAL 8L: 200mm f\/6 Primary with Certified 1\/6 PV Wavefront Optics\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the IDEAL 8L is a 200mm parabolic primary mirror, hand-figured to a minimum standard of 1\/6 Peak-to-Valley (PV) wavefront accuracy. This figure, verified by an included Zygo interferometer report, ensures that the telescope delivers sharp, high-contrast images free from the subtle aberrations that soften details in mass-produced optics. The 1200mm focal length results in an f\/6 focal ratio—a versatile sweet spot that provides enough magnification for detailed lunar and planetary work while remaining fast enough for capturing faint nebulae.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 1\/6 PV Optics:\u003c\/strong\u003e This grade significantly exceeds the \"diffraction-limited\" standard (1\/4 PV), delivering visibly sharper planetary detail and tighter star points.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Upgrades (1\/8 PV \u0026amp; 1\/10 PV):\u003c\/strong\u003e For the most demanding applications, optional upgrades to 1\/8 PV or 1\/10 PV wavefront accuracy are available, pushing theoretical optical limits for the highest possible contrast and resolution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50mm Secondary Mirror:\u003c\/strong\u003e The 50mm secondary mirror is sized for full illumination of the focal plane without excessive obstruction, preserving image contrast.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCNC 9-Point Cell and 12V Fan: Stable Optics and Rapid Cooling\u003c\/h3\u003e\n\u003cp\u003eThe primary mirror's certified accuracy is maintained by a robust mechanical design. A fully CNC-machined 9-point suspension cell supports the 200mm mirror's 8kg weight evenly, preventing gravitational flexure that can distort the optical figure and degrade image quality. This ensures your collimation remains stable throughout an observing session.\u003c\/p\u003e\n\u003cp\u003eTo achieve peak optical performance, the primary mirror must reach thermal equilibrium with the ambient air. The IDEAL 8L includes an integrated 12-volt fan at the rear of the mirror cell, which dramatically accelerates cooling time. This minimizes internal tube currents, allowing you to get sharp, steady views much faster after setting up.\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\u003eEris 2\" Rack and Pinion Focuser: Precision and Stability\u003c\/h3\u003e\n\u003cp\u003eThe IDEAL 8L is equipped with a purpose-built Eris 2\" rack and pinion focuser. Unlike common Crayford designs that can slip under heavy loads, the rack and pinion mechanism provides a positive, non-slip action capable of supporting heavier eyepieces and full imaging trains. A smooth-lock mechanism secures the drawtube without shifting the optical axis, preserving critical focus.\u003c\/p\u003e\n\u003cp\u003eThe focuser accepts standard 2\" accessories and includes a 31.7mm (1.25\") adapter, allowing you to use the full range of eyepieces and accessories. The entire OTA is housed in a durable 225mm diameter aluminium tube finished in Galaxy Silver, keeping the total weight to only 8kg for easy mounting.\u003c\/p\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 is the main advantage of the IDEAL 8L's 1\/6 PV wavefront optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003e1\/6 PV wavefront\u003c\/strong\u003e means the mirror surface deviates from a perfect parabola by no more than 1\/6th the wavelength of light. This is significantly more accurate than the industry standard for \"diffraction-limited\" (1\/4 PV). The practical result is higher image contrast, which allows you to see finer details like Cassini's Division in Saturn's rings and delicate cloud bands on Jupiter more clearly and consistently.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs it worth upgrading the IDEAL 8L to 1\/8 PV or 1\/10 PV optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor most visual observers, the standard \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic is exceptional. Upgrading to \u003cstrong\u003e1\/8 PV\u003c\/strong\u003e or \u003cstrong\u003e1\/10 PV\u003c\/strong\u003e is recommended for dedicated planetary imagers or visual observers seeking the absolute pinnacle of optical performance. These higher grades of correction can reveal subtle, low-contrast details that are otherwise lost to minute scattering, especially during moments of excellent atmospheric seeing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the IDEAL 8L perform on Jupiter with its 1200mm focal length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e200mm aperture\u003c\/strong\u003e provides excellent resolving power for Jupiter, while the \u003cstrong\u003e1200mm focal length\u003c\/strong\u003e gives you a good image scale right out of the box. With a 6mm eyepiece, you'd achieve 200x magnification, ideal for resolving the Great Red Spot, intricate cloud belts, and the shadows of Galilean moons transiting the planet's disk. The high-quality 1\/6 PV mirror ensures these details are rendered with maximum sharpness and contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is needed for the IDEAL 8L OTA, given its 8kg weight?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a tube weight of \u003cstrong\u003e8kg\u003c\/strong\u003e and a length of \u003cstrong\u003e1130mm\u003c\/strong\u003e, the IDEAL 8L requires a sturdy equatorial mount. For visual use, a mount in the EQ5\/CG-5 class is the minimum requirement. For astrophotography, a mount with a higher payload capacity, such as one from the EQ6\/CGEM class, is strongly recommended to handle the additional weight of a camera and guide scope and to ensure tracking stability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the Eris 2\" focuser on the IDEAL 8L handle a heavy imaging camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003eEris 2\" focuser\u003c\/strong\u003e uses a rack and pinion design specifically for this purpose. Unlike Crayford-style focusers which can slip under the weight of a heavy camera, filter wheel, and off-axis guider, the geared mechanism of the R+P focuser ensures a positive, secure hold without any slippage, even when pointed near the zenith.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow important is the 12V cooling fan on the IDEAL 8L's primary mirror?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e12V fan\u003c\/strong\u003e is critical for reaching peak performance quickly. A 200mm mirror has significant thermal mass and can take over an hour to cool to the ambient night air temperature on its own. The fan reduces this time to 15-20 minutes, actively removing the warm boundary layer of air above the mirror that causes \"tube currents\" and distorted, wavy 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\u003ePrimary Mirror Diameter\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\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront (optional upgrades to 1\/8 PV and 1\/10 PV)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eEris 2\" Rack and Pinion with smooth lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9 point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003e12 volt fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e8kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1130mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e225mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Finish\u003c\/td\u003e\n\u003ctd\u003eGalaxy Silver\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":"Professional (1\/6 PV)","offer_id":52942598209821,"sku":"OOUK-IDEAL-8L","price":1726.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942598242589,"sku":"OOUK-IDEAL-8L-1-8-PV","price":1841.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942598275357,"sku":"OOUK-IDEAL-8L-1-10-PV","price":1862.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-IDEAL-8L-Optical-Tube-Assembly-1_036d161f-39a7-4be9-b578-4f9a8132d1c7.jpg?v=1789608230"},{"product_id":"orion-optics-uk-ideal-10","title":"Orion Optics UK IDEAL 10 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e250mm (10-inch) Primary Mirror\u003c\/li\u003e\n\u003cli\u003e1200mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/4.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV Wavefront Hand-Figured Optics\u003c\/li\u003e\n\u003cli\u003e11kg Nominal Tube Weight\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 IDEAL 10 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK IDEAL 10 Optical Tube Assembly combines a fast 250mm f\/4.8 optical system with a guaranteed 1\/6 PV wavefront primary mirror for exceptional deep-sky and planetary capability. Its 1200mm focal length provides the magnification needed for resolving fine detail, while the entire 1140mm aluminium tube weighs a manageable 11kg. Support for the 250mm primary is handled by a CNC-machined 9-point suspension cell, ensuring optical stability as the telescope moves.\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\u003eIDEAL 10: A 250mm f\/4.8 Newtonian for High-Contrast Imaging\u003c\/h3\u003e\n\u003cp\u003eWith its 250mm aperture, the IDEAL 10 gathers enough light to reveal faint details in distant galaxies and nebulae. The f\/4.8 focal ratio creates a wide field of view and reduces exposure times for astrophotography, allowing you to capture more data in a single session. This combination of aperture and speed makes the IDEAL 10 a powerful, dual-purpose instrument for both visual observers seeking immersive views and imagers wanting a fast, high-resolution system.\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\u003eCertified 1\/6 PV Wavefront Optics: The Orion Optics UK Guarantee\u003c\/h3\u003e\n\u003cp\u003eEvery IDEAL 10 includes a primary mirror hand-figured to a minimum 1\/6 PV (Peak-to-Valley) wavefront accuracy, a standard many manufacturers consider a premium upgrade. This figure represents how closely the mirror's surface matches a perfect parabola; a smaller fraction means higher precision, resulting in sharper stars and higher contrast on planetary details. Each optic is tested on a Zygo laser interferometer and supplied with its own report, guaranteeing its performance.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Grade (1\/6 PV):\u003c\/strong\u003e Delivers excellent, high-contrast views far exceeding mass-produced optics. This is the guaranteed minimum quality for every IDEAL telescope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Grade (1\/8 PV Upgrade):\u003c\/strong\u003e An optional upgrade for discerning observers, offering visibly higher contrast on challenging targets like Jupiter's cloud bands and lunar rilles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResearch Grade (1\/10 PV Upgrade):\u003c\/strong\u003e The highest level of correction available, providing near-perfect images limited only by atmospheric seeing. This grade is for those who require the absolute maximum resolution from a 250mm aperture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRock-Solid Imaging Platform: A 9-Point Cell and 2\" Eris Focuser\u003c\/h3\u003e\n\u003cp\u003eSuperior optics require an equally robust mechanical system. The IDEAL 10's 250mm mirror is supported by a CNC-machined 9-point suspension cell that prevents flexure and maintains collimation. A built-in 12-volt fan accelerates mirror cooling to ambient temperature, minimizing tube currents and ensuring sharp images sooner. The in-house designed Eris 2\" Rack and Pinion focuser provides a rigid, zero-slip drawtube with a smooth lock, capable of holding heavy imaging cameras and eyepieces perfectly centered on the optical axis.\u003c\/p\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 does the IDEAL 10's 1\/6 PV wavefront accuracy mean for observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003ePV (Peak-to-Valley) wavefront\u003c\/strong\u003e measures the precision of the mirror's curve. A 1\/6 PV rating means the IDEAL 10's optics are figured to a very high standard, delivering sharper stars and higher contrast than typical \"diffraction-limited\" optics. This results in more visible detail on planets and tighter star clusters. Every Orion Optics UK mirror includes a Zygo interferometer test report certifying its quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the IDEAL 10 OTA good for imaging planets like Jupiter and Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The 250mm aperture provides excellent resolution, and the 1200mm focal length is a great starting point for high-magnification planetary work. When combined with a 2.5x or 3x Barlow lens, the IDEAL 10 can easily achieve the focal ratios needed for detailed planetary imaging. For the best possible results, consider the optional 1\/8 PV or 1\/10 PV optical upgrades, which maximize image contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen should I upgrade the IDEAL 10 to 1\/8 PV or 1\/10 PV optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the standard 1\/6 PV optics are excellent for all-around use, you should consider an upgrade if your primary focus is high-resolution planetary or lunar observing.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eChoose the \u003cstrong\u003e1\/8 PV upgrade\u003c\/strong\u003e for a noticeable increase in contrast and fine detail, making it easier to see subtle features in Jupiter's atmosphere or the Cassini Division in Saturn's rings.\u003c\/li\u003e\n\u003cli\u003eChoose the \u003cstrong\u003e1\/10 PV upgrade\u003c\/strong\u003e if you want the ultimate optical precision, where the telescope's performance is limited only by the seeing conditions, not the mirror itself.\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 9-point mirror cell on the IDEAL 10 improve performance?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA large 250mm mirror can deform under its own weight if not supported correctly, distorting the image. The CNC-machined 9-point cell on the IDEAL 10 distributes the mirror's 11kg weight evenly across nine optimized points. This prevents gravitational flexure as the tube moves, preserving the mirror's precise figure and maintaining sharp focus and collimation.\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 11kg IDEAL 10 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a tube weight of 11kg and a length of 1140mm, the IDEAL 10 requires a stable equatorial mount with a payload capacity of at least 15-20kg (33-44 lbs) for visual use, and preferably higher for astrophotography. Mounts in the Sky-Watcher EQ6-R Pro, Celestron CGX, or iOptron CEM40 class are appropriate choices to ensure stability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the f\/4.8 focal ratio affect viewing the Andromeda Galaxy (M31) with the IDEAL 10?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe f\/4.8 ratio gives the IDEAL 10 a wide field of view for its aperture. When paired with a low-power, wide-field 2\" eyepiece, you can frame large objects like the Andromeda Galaxy (M31) or the Pleiades (M45) within a single view. This fast focal ratio also results in a brighter image and a larger exit pupil at a given magnification, which is ideal for observing faint, extended deep-sky objects.\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\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e250mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Focal Length\u003c\/td\u003e\n\u003ctd\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Upgrade Options\u003c\/td\u003e\n\u003ctd\u003e1\/8 PV and 1\/10 PV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e63mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eEris 2\" Rack and Pinion with smooth lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9 point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror\/Tube Cooling\u003c\/td\u003e\n\u003ctd\u003e12-volt fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Tube Weight\u003c\/td\u003e\n\u003ctd\u003e11kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e280mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1140mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Finish\u003c\/td\u003e\n\u003ctd\u003eGalaxy Silver\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":"Professional (1\/6 PV)","offer_id":52942599618845,"sku":"OOUK-IDEAL-10","price":2257.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942599651613,"sku":"OOUK-IDEAL-10-1-8-PV","price":2392.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942599684381,"sku":"OOUK-IDEAL-10-1-10-PV","price":2495.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-IDEAL-10-Optical-Tube-Assembly-1_e076c097-eb0b-4b9c-94f1-67492c79546a.jpg?v=1789608239"},{"product_id":"orion-optics-uk-ideal-10l","title":"Orion Optics UK IDEAL 10L Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e250mm (10-inch) primary mirror diameter\u003c\/li\u003e\n\u003cli\u003e1600mm focal length (f\/6.3)\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV wavefront optical accuracy\u003c\/li\u003e\n\u003cli\u003eCNC-machined 9-point suspension mirror cell\u003c\/li\u003e\n\u003cli\u003e12-volt mirror cooling fan\u003c\/li\u003e\n\u003cli\u003eEris 2\" Rack and Pinion 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\u003eIDEAL 10L Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe IDEAL 10L Optical Tube Assembly combines a 250mm primary mirror with a 1600mm focal length for a versatile f\/6.3 system. Every mirror is hand-figured to a minimum 1\/6 PV wavefront accuracy, ensuring high-contrast planetary and deep-sky views right out of the box. The entire assembly weighs a nominal 12kg, supported by a CNC-machined 9-point cell and housed in a 1550mm aluminum tube.\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\u003ePrecision Optics: A Guaranteed 1\/6 PV Wavefront\u003c\/h3\u003e\n\u003cp\u003eThe heart of the IDEAL 10L is its 250mm parabolic primary mirror. Unlike mass-produced optics, each mirror is hand-finished and tested via Zygo laser interferometry to meet a guaranteed 1\/6 Peak-to-Valley (PV) wavefront accuracy. This specification directly translates to sharper, higher-contrast images at the eyepiece, allowing you to resolve finer details in Jupiter's cloud bands or split tight double stars.\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\u003eCNC 9-Point Cell and 12-Volt Cooling for Stable Views\u003c\/h3\u003e\n\u003cp\u003eTo maintain optical alignment and performance, the primary mirror rests on a CNC-machined 9-point suspension cell. This design distributes the mirror's 12kg weight evenly, preventing flexure that can distort the image. An integrated 12-volt fan accelerates the cooling process, bringing the mirror to ambient temperature faster to minimize tube currents and ensure your views are steady from the start of your session.\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 Eris 2\" Rack and Pinion Focuser\u003c\/h3\u003e\n\u003cp\u003eThe IDEAL 10L is fitted with a robust Eris 2\" rack and pinion focuser. This in-house design provides a stable, shift-free platform for heavy 2\" eyepieces and imaging cameras. A smooth-locking mechanism holds accessories securely and perfectly centered in the optical path without marring barrels, ensuring critical focus is maintained throughout long exposures.\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\u003eUnderstanding Optical Grades: 1\/6 PV vs. 1\/8 PV and 1\/10 PV\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV wavefront optics deliver exceptional views, optional upgrades to 1\/8 PV or 1\/10 PV are available for the most demanding observers. A smaller PV fraction indicates the mirror surface more closely matches a perfect parabola, resulting in tangible improvements in image definition.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/6 PV (Professional Grade):\u003c\/strong\u003e The standard for the IDEAL 10L. Excellent for all-around visual use and imaging, revealing significant detail on planets and deep-sky objects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/8 PV (Research Grade):\u003c\/strong\u003e A noticeable step up, offering higher contrast that makes subtle planetary features and faint galactic details more apparent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/10 PV (Ultra Grade):\u003c\/strong\u003e The highest level of correction available. This grade minimizes light scatter to an exceptional degree, producing the sharpest possible images and the darkest sky backgrounds, ideal for high-resolution planetary imaging and critical visual observation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 can I expect to see with the IDEAL 10L's 250mm mirror?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its 250mm aperture, the IDEAL 10L gathers enough light to resolve fine details within galaxies like the spiral arms of the Whirlpool Galaxy (M51) and the dust lanes in the Andromeda Galaxy (M31). On planets, you can expect to clearly see the Cassini Division in Saturn's rings, the Great Red Spot on Jupiter, and polar caps on Mars when conditions allow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 1\/6 PV wavefront accuracy of the IDEAL 10L improve views of Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA higher PV wavefront accuracy means more light from the target is focused into a single point, increasing contrast. For Jupiter, this allows the \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic to more clearly define the boundaries between its cloud belts and zones, resolve smaller storms and barges, and reveal subtle color variations that would be smeared out by a less accurate mirror.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the IDEAL 10L's 12kg tube weight suitable for a mid-range equatorial mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe nominal tube weight of \u003cstrong\u003e12kg\u003c\/strong\u003e places the IDEAL 10L within the capacity of many popular mid-range mounts (e.g., EQ6-R, CEM40) for visual use. For long-exposure astrophotography, where you'll add a camera, guide scope, and other accessories, a mount with a higher payload capacity is recommended to ensure stability and tracking accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the CNC 9-point suspension mirror cell in the IDEAL 10L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003e9-point suspension cell\u003c\/strong\u003e provides optimal support for the 250mm primary mirror, preventing its own weight from deforming its precisely figured surface as the telescope moves. This is crucial for maintaining the mirror's specified 1\/6 PV wavefront accuracy, ensuring that you get sharp, coma-free stars across the field of view, regardless of where the telescope is pointing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen should I consider upgrading the IDEAL 10L optics to 1\/8 PV or 1\/10 PV?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou should consider an upgrade if your primary focus is high-resolution planetary imaging or critical visual observation of faint details. While the standard \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic is excellent, an \u003cstrong\u003e1\/8 PV\u003c\/strong\u003e or \u003cstrong\u003e1\/10 PV\u003c\/strong\u003e mirror will provide a detectable increase in contrast and sharpness, allowing you to push magnification higher and resolve the most challenging details on the Moon, planets, and double stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the f\/6.3 focal ratio affect imaging with the IDEAL 10L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003ef\/6.3\u003c\/strong\u003e focal ratio is a versatile \"sweet spot.\" It's fast enough to capture deep-sky objects like the Orion Nebula (M42) with reasonable exposure times, yet the \u003cstrong\u003e1600mm\u003c\/strong\u003e focal length provides enough image scale to resolve significant detail on the Moon and planets without requiring aggressive Barlow lenses. This makes the IDEAL 10L a capable performer for both types of astrophotography.\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\u003eOptics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront (optional upgrades to 1\/8 PV and 1\/10 PV)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e250mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1600mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e12kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1550mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e280mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Finish\u003c\/td\u003e\n\u003ctd\u003eGalaxy Silver Paint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eEris 2\" Rack and Pinion with smooth lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003e12-volt mirror fan\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":"Professional (1\/6 PV)","offer_id":52942601126173,"sku":"OOUK-IDEAL-10L","price":2277.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942601158941,"sku":"OOUK-IDEAL-10L-1-8-PV","price":2411.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942601191709,"sku":"OOUK-IDEAL-10L-1-10-PV","price":2514.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-IDEAL-10L-Optical-Tube-Assembly-1_5bc646e0-d513-4973-bb89-372f905ae0ac.jpg?v=1789608249"},{"product_id":"orion-optics-uk-ideal-12","title":"Orion Optics UK IDEAL 12 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e300mm (12\") Primary Mirror\u003c\/li\u003e\n\u003cli\u003e1200mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/4 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e1\/6 PV Wavefront Standard Optics\u003c\/li\u003e\n\u003cli\u003e14kg Tube Weight\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\u003eIDEAL 12 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe IDEAL 12 Optical Tube Assembly combines a 300mm primary mirror with a fast f\/4 focal ratio, delivering a 1200mm focal length ideal for wide-field imaging. Housed in a lightweight 14kg aluminium tube, every optic is certified to a minimum 1\/6 PV wavefront accuracy and supported by a CNC-machined 9-point suspension mirror cell cooled by a 12-volt fan for thermal stability.\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\/6 PV Wavefront Optics: A 300mm f\/4 System Verified by Zygo\u003c\/h3\u003e\n\u003cp\u003eThe heart of the IDEAL 12 is its 300mm parabolic primary mirror, engineered for high-resolution imaging. The fast f\/4 focal ratio provides a wide field of view, perfect for capturing large nebulae and galaxies, while the 1200mm focal length retains ample image scale for smaller targets. Every mirror is hand-finished and guaranteed to a 1\/6 PV wavefront accuracy, with an included Zygo interferometer report to prove its quality.\u003c\/p\u003e\n\u003cp\u003eThis level of optical precision ensures sharp, high-contrast images, free from the spherical aberration that can soften details in mass-produced optics. The 75mm secondary mirror results in a 25% central obstruction by diameter, a balanced figure that preserves contrast for planetary viewing while maximizing light collection for deep-sky 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\u003eMechanical Engineering: A 14kg OTA with a 9-Point Cell and Eris Focuser\u003c\/h3\u003e\n\u003cp\u003eBuilt from lightweight aluminium, the IDEAL 12 weighs only 14kg, making it manageable for a wide range of equatorial mounts. The primary mirror is supported by a CNC-machined 9-point suspension cell that distributes the mirror's weight evenly, preventing flexure and preserving collimation. A built-in 12-volt fan accelerates mirror cooling, reducing tube currents and allowing you to start imaging sooner.\u003c\/p\u003e\n\u003cp\u003eFor focus control, the IDEAL 12 includes the robust Eris 2\" Rack and Pinion focuser. This in-house design provides a rigid, no-slip platform for heavy cameras, filter wheels, and coma correctors. The smooth lock mechanism secures your eyepiece or camera perfectly on-axis without introducing tilt.\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\u003eChoosing Your Optical Grade: 1\/6 PV vs. 1\/8 PV and 1\/10 PV\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV wavefront optic delivers exceptional performance, optional upgrades are available for the most demanding applications. The choice depends entirely on your primary observing targets and tolerance for atmospheric seeing conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard (1\/6 PV):\u003c\/strong\u003e This grade provides excellent, sharp views and is more than sufficient for high-quality deep-sky imaging and general visual use. It represents a significant step up from \"diffraction-limited\" optics found in mass-market telescopes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Upgrade (1\/8 PV):\u003c\/strong\u003e For dedicated lunar and planetary imagers, the 1\/8 PV upgrade yields visibly higher contrast on fine details. You'll resolve more subtle banding on Jupiter and finer divisions in Saturn's rings when seeing is steady.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResearch Upgrade (1\/10 PV):\u003c\/strong\u003e The ultimate in optical precision. A 1\/10 PV wavefront mirror delivers the highest possible contrast and resolution the 300mm aperture can achieve. Images remain sharper and more stable even in less-than-perfect seeing, making it the choice for research-level work or imagers who require the best possible data.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 kind of performance can I expect from the IDEAL 12's standard 1\/6 PV optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe standard \u003cstrong\u003e1\/6 PV wavefront\u003c\/strong\u003e optics provide demonstrably sharper and higher-contrast images than typical \"diffraction-limited\" telescopes. You can expect pinpoint stars across a well-corrected field (with an appropriate coma corrector) and the ability to resolve fine detail on planets. Each IDEAL 12 comes with a Zygo test report, guaranteeing this level of optical quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat class of mount is required for the IDEAL 12 OTA at 14kg?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a tube weight of \u003cstrong\u003e14kg\u003c\/strong\u003e, the IDEAL 12 OTA is best paired with an equatorial mount in the EQ6\/CGEM class or greater for visual use. For serious astrophotography, a mount with a higher payload capacity (e.g., 50 lbs \/ 22 kg or more) is recommended to handle the additional weight of a camera, guide scope, and other accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the Eris 2\" Rack and Pinion focuser on the IDEAL 12 handle a heavy imaging camera and filter wheel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003eEris 2\" Rack and Pinion (R+P) focuser\u003c\/strong\u003e is specifically designed for stability. Unlike Crayford-style focusers that can slip under heavy loads, the R+P mechanism provides a positive, non-slip action capable of supporting a full imaging train without flexure or tilt.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the IDEAL 12 at f\/4 perform on Jupiter with a Barlow lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe IDEAL 12's \u003cstrong\u003e300mm\u003c\/strong\u003e aperture provides immense resolving power for planets. To bring Jupiter to a suitable image scale, you would use a 3x or 5x Barlow lens, effectively changing the focal ratio to f\/12 or f\/20. The \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optics (or higher) will ensure you can resolve fine details like the Great Red Spot, barges, and subtle cloud belts, provided atmospheric seeing is good.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the IDEAL 12 a good choice for imaging large targets like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The \u003cstrong\u003ef\/4 focal ratio\u003c\/strong\u003e and \u003cstrong\u003e1200mm focal length\u003c\/strong\u003e are an excellent combination for large deep-sky objects. Paired with a full-frame sensor and a coma corrector, the IDEAL 12 can frame the entirety of the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000), capturing faint outer details thanks to its large 300mm light-gathering aperture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen should I consider upgrading the IDEAL 12 to 1\/8 PV or 1\/10 PV optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou should consider the optical upgrades if your primary focus is high-resolution lunar and planetary imaging. While the standard \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic is excellent, a \u003cstrong\u003e1\/8 PV\u003c\/strong\u003e or \u003cstrong\u003e1\/10 PV\u003c\/strong\u003e mirror will deliver visibly higher contrast on low-contrast details. This makes a real difference when trying to capture subtle features within Jupiter's zones or faint craterlet chains on the Moon.\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\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Upgrades\u003c\/td\u003e\n\u003ctd\u003eOptional upgrades to 1\/8 PV and 1\/10 PV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eEris 2\" Rack and Pinion with smooth lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9 point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror\/Tube Cooling\u003c\/td\u003e\n\u003ctd\u003e12 volt fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e14kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1160mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e326mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Finish\u003c\/td\u003e\n\u003ctd\u003eGalaxy Silver\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":"Professional (1\/6 PV)","offer_id":52942602600733,"sku":"OOUK-IDEAL-12","price":3025.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942602633501,"sku":"OOUK-IDEAL-12-1-8-PV","price":3211.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942602666269,"sku":"OOUK-IDEAL-12-1-10-PV","price":3406.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-IDEAL-12-Optical-Tube-Assembly-1_01cb187b-a6b3-46cb-82ed-c99bbdbb02d8.jpg?v=1789608258"},{"product_id":"orion-optics-uk-ideal-12l","title":"Orion Optics UK IDEAL 12L Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e300mm (12\") Primary Mirror Diameter\u003c\/li\u003e\n\u003cli\u003e1600mm Focal Length (f\/5.3)\u003c\/li\u003e\n\u003cli\u003e1\/6 PV Wavefront Standard Optical Accuracy\u003c\/li\u003e\n\u003cli\u003eEris 2\" Rack and Pinion Focuser\u003c\/li\u003e\n\u003cli\u003e16kg Nominal Tube Weight\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\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\u003eIDEAL 12L Optical Tube Assembly\u003c\/h2\u003e\n      \u003cp\u003eThe Orion Optics UK IDEAL 12L combines a large 300mm aperture with a versatile 1600mm focal length (f\/5.3) in an optical tube weighing a manageable 16kg. Every IDEAL 12L is built around a primary mirror hand-figured to a minimum 1\/6 PV wavefront accuracy, with each optic's quality certified by an included Zygo interferometer report. This OTA is engineered for observers and imagers seeking high-contrast, diffraction-limited views without the cost of research-grade instruments.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003e300mm f\/5.3 Primary with 1\/6 PV Wavefront Accuracy\u003c\/h3\u003e\n      \u003cp\u003eThe heart of the IDEAL 12L is its 300mm primary mirror. This large aperture gathers significant light, resolving faint details in distant galaxies and nebulae. The 1600mm focal length strikes a balance, providing enough image scale for detailed views of planets and the Moon while the f\/5.3 focal ratio remains fast enough for deep-sky imaging.\u003c\/p\u003e\n      \u003cp\u003eOrion Optics UK guarantees a standard optical quality of 1\/6 PV wavefront. This figure, verified by Zygo laser interferometry for every mirror, ensures that the telescope delivers sharp, high-contrast images capable of revealing fine planetary detail like Jupiter's cloud bands and the Cassini Division in Saturn's rings, well beyond what standard \"diffraction-limited\" optics can resolve.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n    \n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eCNC 9-Point Cell and Eris 2\" Focuser: A Stable Optical Platform\u003c\/h3\u003e\n      \u003cp\u003eTo maintain the primary mirror's precise figure, the IDEAL 12L uses a CNC-machined 9-point suspension cell. This design evenly supports the 16kg mirror, preventing flexure and astigmatism as the telescope moves across the sky. A built-in 12-volt fan accelerates mirror cooling, reducing tube currents and ensuring stable images sooner.\u003c\/p\u003e\n      \u003cp\u003eThe OTA is fitted with a robust, in-house designed Eris 2\" rack and pinion focuser. Its smooth-lock mechanism securely holds heavy eyepieces and imaging cameras without shifting the optical axis, ensuring consistent focus and sharp stars across the field. The entire assembly is housed in a 1510mm long rolled aluminium tube, providing a rigid yet lightweight structure.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eChoosing Your Optical Grade: 1\/6 PV vs. 1\/8 PV vs. 1\/10 PV\u003c\/h3\u003e\n      \u003cp\u003eWhile the standard 1\/6 PV optic delivers exceptional views, the IDEAL 12L offers optional upgrades for the most demanding applications. The choice depends entirely on your observing priorities and conditions. A higher-grade mirror doesn't gather more light, but it focuses the light it gathers more precisely, leading to visibly higher contrast on low-contrast planetary features and tighter star images.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003e1\/6 PV (Professional Grade):\u003c\/strong\u003e The standard offering. An excellent all-around choice that provides a significant step up from mass-produced optics, ideal for both deep-sky viewing and serious planetary observation.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e1\/8 PV (Research Grade):\u003c\/strong\u003e A premium upgrade for dedicated planetary imagers and visual observers. This level of correction can reveal subtle, low-contrast details on Mars and Jupiter that may be lost in a 1\/6 PV system under steady seeing.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e1\/10 PV (Ultra Grade):\u003c\/strong\u003e The highest precision available. This grade is for those who require the absolute best possible image contrast and resolution, typically for specialized research or imaging from sites with consistently excellent atmospheric seeing.\u003c\/li\u003e\n      \u003c\/ul\u003e\n      \u003cp\u003eThe images below illustrate the typical improvement in planetary detail as the mirror's surface accuracy increases from the included 1\/6 PV Professional grade to the 1\/10 PV Ultra grade.\u003c\/p\u003e\n       \u003cdiv class=\"DAV-grid-2\"\u003e\n           \u003cdiv class=\"DAV-grid-item\"\u003e\n               \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn view with 1\/6 PV optics\"\u003e\n               \u003cp class=\"DAV-caption\"\u003e1\/6 PV - Professional\u003c\/p\u003e\n           \u003c\/div\u003e\n           \u003cdiv class=\"DAV-grid-item\"\u003e\n               \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn view with 1\/8 PV optics\"\u003e\n               \u003cp class=\"DAV-caption\"\u003e1\/8 PV - Research\u003c\/p\u003e\n           \u003c\/div\u003e\n           \u003cdiv class=\"DAV-grid-item\"\u003e\n               \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn view with 1\/10 PV optics\"\u003e\n               \u003cp class=\"DAV-caption\"\u003e1\/10 PV - Ultra\u003c\/p\u003e\n           \u003c\/div\u003e\n       \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the 16kg IDEAL 12L OTA?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWith a nominal weight of \u003cstrong\u003e16kg\u003c\/strong\u003e and a length of \u003cstrong\u003e1510mm\u003c\/strong\u003e, the IDEAL 12L requires a substantial German Equatorial Mount. For visual use, a mount in the EQ6\/CGEM class is the minimum. For serious astrophotography, a mount with a higher payload capacity, such as a Sky-Watcher EQ8-R or similar, is strongly recommended to handle the weight and long moment arm.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the IDEAL 12L perform on faint galaxies like the Leo Trio (M66 Group)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003e300mm\u003c\/strong\u003e aperture is excellent for resolving details in galaxy groups. With the IDEAL 12L, you can expect to clearly see the distinct shapes of M65, M66, and NGC 3628 in the Leo Trio from a dark sky site. The f\/5.3 focal ratio provides a wide enough field with a 2\" eyepiece to frame multiple galaxies, while the high-contrast optics will help reveal dust lanes and spiral structure.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the standard 1\/6 PV optic on the IDEAL 12L good enough for high-resolution imaging of Jupiter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. The \u003cstrong\u003e1\/6 PV wavefront\u003c\/strong\u003e standard is significantly better than typical mass-produced optics and is more than capable of producing detailed, high-contrast images of Jupiter. It will clearly resolve major features like the Great Red Spot, prominent cloud bands, and festoons, especially when paired with a high-frame-rate planetary camera and good seeing conditions.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I consider upgrading the IDEAL 12L to 1\/8 PV or 1\/10 PV optics?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eUpgrading to \u003cstrong\u003e1\/8 PV or 1\/10 PV\u003c\/strong\u003e is for observers who want to extract the maximum possible detail from the 300mm aperture. This upgrade is most beneficial for:\u003c\/p\u003e\n    \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePlanetary Imaging:\u003c\/strong\u003e Higher precision optics yield higher contrast, making it easier to capture subtle atmospheric details on Jupiter, surface features on Mars, or Encke's division in Saturn's rings.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVisual Observing from excellent sites:\u003c\/strong\u003e If you regularly observe under very steady skies (good \"seeing\"), the higher optical grade will allow you to push magnification higher without the image breaking down.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the 9-point mirror cell in the IDEAL 12L?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003eCNC 9-point suspension mirror cell\u003c\/strong\u003e provides optimized support for the 300mm primary mirror. A large mirror can sag under its own weight, distorting its carefully figured shape and degrading the image. The 9-point cell distributes the support across the back of the mirror, neutralizing the effects of gravity and preserving the optical alignment and performance as the telescope points to different parts of the sky.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the IDEAL 12L require collimation?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, like all Newtonian telescopes, the IDEAL 12L will require periodic collimation to ensure the primary and secondary mirrors are perfectly aligned. The robust mirror cell and tube construction help it hold collimation well, but checking alignment before each session with a laser collimator or Cheshire eyepiece is recommended for optimal performance.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1600mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.3\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eStandard Optical Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Upgrade Options\u003c\/td\u003e\n\u003ctd\u003e1\/8 PV and 1\/10 PV\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e63mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eEris 2\" Rack and Pinion with smooth lock\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003e12-volt fan\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e326mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1510mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e16kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Finish\u003c\/td\u003e\n\u003ctd\u003eGalaxy Silver Paint\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eIDEAL 12L Optical Tube Assembly Only\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\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":"Professional (1\/6 PV)","offer_id":52942603551005,"sku":"OOUK-IDEAL-12L","price":3044.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942603583773,"sku":"OOUK-IDEAL-12L-1-8-PV","price":3230.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942603616541,"sku":"OOUK-IDEAL-12L-1-10-PV","price":3426.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-IDEAL-12L-Optical-Tube-Assembly-1_14fb3266-dd62-42e7-88fe-ee47a9d7630e.jpg?v=1789608268"},{"product_id":"orion-optics-uk-ideal-14","title":"Orion Optics UK IDEAL 14 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e350mm (14\") Primary Mirror\u003c\/li\u003e\n\u003cli\u003e1600mm Focal Length (f\/4.6)\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV Wavefront Hand-Figured Optics\u003c\/li\u003e\n\u003cli\u003eCNC-Machined 9-Point Suspension Mirror Cell\u003c\/li\u003e\n\u003cli\u003eEris 2\" Rack and Pinion Focuser\u003c\/li\u003e\n\u003cli\u003e12-Volt Mirror Cooling Fan\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\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\u003eIDEAL 14 Optical Tube Assembly\u003c\/h2\u003e\n      \u003cp\u003eThe Orion Optics UK IDEAL 14 OTA combines a large 350mm primary mirror with a fast f\/4.6 focal ratio for breathtaking wide-field views and deep-sky imaging capability. With a nominal focal length of 1600mm and a standard optical grade of 1\/6 PV wavefront accuracy, this telescope delivers high-contrast, sharp images verified by an included Zygo interferometer report. The entire assembly weighs a manageable 20kg, supported by a CNC-machined 9-point mirror cell and housed in a 1540mm aluminium tube.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003e1\/6 PV Wavefront Optics: Zygo-Verified Precision in a 350mm Mirror\u003c\/h3\u003e\n      \u003cp\u003eThe heart of the IDEAL 14 is its hand-figured 350mm primary mirror, guaranteed to a minimum 1\/6 PV wavefront accuracy. This standard of optical quality, which exceeds the common \"diffraction-limited\" benchmark, ensures that the maximum amount of light is focused into a tight, high-contrast point, revealing subtle details on planets and resolving faint stars in dense clusters. Every optic is supplied with its own Zygo interferometer test report, providing objective proof of its exceptional surface accuracy.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eEngineered for Stability: 9-Point Cell and 12V Cooling\u003c\/h3\u003e\n      \u003cp\u003eTo maintain optical alignment and thermal equilibrium, the IDEAL 14 employs robust mechanical systems. The 350mm primary mirror rests on a CNC-machined 9-point suspension cell that distributes the 20kg tube's weight evenly, preventing flexure and preserving collimation as the telescope moves across the sky. An integrated 12-volt fan actively cools the primary mirror, reducing tube currents and ensuring the optics reach ambient temperature quickly for the sharpest possible views.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eEris 2\" Focuser:\u003c\/strong\u003e The in-house designed rack-and-pinion focuser provides a stable, shift-free platform for heavy eyepieces or an imaging train, with a smooth lock mechanism to hold accessories perfectly on-axis.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eAluminium Tube:\u003c\/strong\u003e The 385mm diameter aluminium tube offers a high strength-to-weight ratio, finished in a durable Galaxy Silver paint.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e75mm Secondary Mirror:\u003c\/strong\u003e The 75mm secondary mirror provides excellent illumination for wide-field eyepieces and large camera sensors without excessive obstruction.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eChoosing Your Optical Grade: 1\/6 PV vs. 1\/8 PV and 1\/10 PV\u003c\/h3\u003e\n      \u003cp\u003eWhile the standard 1\/6 PV optic delivers superb images, optional upgrades to 1\/8 PV or 1\/10 PV are available for the most demanding visual observers and planetary imagers. A higher-grade mirror, with a surface closer to a perfect parabola, concentrates more light into the central Airy disk of a star image. This translates directly to higher contrast on low-contrast planetary features like the cloud bands of Saturn or the subtle festoons on Jupiter.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003e1\/6 PV (Professional Grade):\u003c\/strong\u003e The standard offering, excellent for all-around visual use and deep-sky imaging, significantly outperforming mass-produced optics.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e1\/8 PV (Research Grade):\u003c\/strong\u003e A noticeable step up for high-magnification planetary and lunar observation, revealing finer details more consistently.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e1\/10 PV (Ultra Grade):\u003c\/strong\u003e The ultimate in optical precision, providing the highest possible contrast and image fidelity, ideal for critical scientific work or capturing state-of-the-art planetary images.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the IDEAL 14 OTA?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe IDEAL 14 OTA has a nominal tube weight of 20kg. To ensure stability, especially for imaging, you will need a robust equatorial mount with a payload capacity of at least 25-30kg (55-66 lbs). Mounts in the EQ6-R Pro, Celestron CGX, or Losmandy G11 class are the minimum recommended for visual use, with higher-capacity mounts being preferable for astrophotography.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the IDEAL 14's 1\/6 PV optical grade compare to \"diffraction-limited\" optics?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe term \"diffraction-limited\" typically refers to an optical system with a 1\/4 PV wavefront error. The IDEAL 14's standard 1\/6 PV wavefront is significantly more accurate. This higher precision means less light is scattered away from the central point of focus, resulting in higher contrast, sharper stars, and the ability to resolve finer details than a standard 1\/4 PV system.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the practical difference I will see between the 1\/6 PV, 1\/8 PV, and 1\/10 PV optics on a target like Jupiter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eOn a night of good seeing, the difference becomes more apparent at high magnification.\n    \u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eWith \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optics, you will clearly see Jupiter's main cloud belts and the Great Red Spot.\u003c\/li\u003e\n    \u003cli\u003eUpgrading to \u003cstrong\u003e1\/8 PV\u003c\/strong\u003e will make smaller ovals, barges, and festoons within the belts appear with greater contrast and clarity.\u003c\/li\u003e\n    \u003cli\u003eThe \u003cstrong\u003e1\/10 PV\u003c\/strong\u003e upgrade provides the most stable and high-contrast image the atmosphere will allow, making the most subtle variations in color and texture visible with critical focus.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the f\/4.6 focal ratio of the IDEAL 14 good for deep-sky imaging?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, an f\/4.6 focal ratio is considered fast and is excellent for deep-sky imaging. It allows you to collect a significant amount of light in a shorter period, reducing total exposure times on faint targets like the Orion Nebula (M42) or the Andromeda Galaxy (M31). However, fast Newtonians require a coma corrector to ensure sharp stars across the entire field of view of a large sensor.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat collimation tools are recommended for an f\/4.6 Newtonian like the IDEAL 14?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe fast f\/4.6 optical system is sensitive to collimation errors. For precise alignment, a combination of a high-quality laser collimator and a Cheshire eyepiece or autocollimator is highly recommended. Precise collimation is essential to realize the full potential of the high-quality 1\/6 PV (or better) optics.\u003c\/p\u003e\n  \u003c\/div\u003e\n      \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the IDEAL 14's Eris focuser support heavier imaging trains?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, the Eris 2\" Rack and Pinion focuser is specifically designed for increased strength and stability. Its rack and pinion mechanism is more robust than a standard Crayford design and is well-suited to holding heavier loads, such as a large sensor camera, filter wheel, and off-axis guider, without slipping or tilting.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront standard (upgrades to 1\/8 PV \u0026amp; 1\/10 PV available)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1600mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.6\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9 point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eEris 2\" Rack and Pinion with smooth lock\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e20kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1540mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e385mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Finish\u003c\/td\u003e\n\u003ctd\u003eGalaxy Silver Paint\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003e12-volt fan\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\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":"Professional (1\/6 PV)","offer_id":52942604927261,"sku":"OOUK-IDEAL-14","price":5579.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942604960029,"sku":"OOUK-IDEAL-14-1-8-PV","price":5896.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942604992797,"sku":"OOUK-IDEAL-14-1-10-PV","price":5994.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"orion-optics-uk-ideal-16","title":"Orion Optics UK IDEAL 16 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e400mm (16\") Primary Mirror\u003c\/li\u003e\n\u003cli\u003e1600mm Focal Length\u003c\/li\u003e\n\u003cli\u003eFast f\/4 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV Wavefront Optics with Zygo Report\u003c\/li\u003e\n\u003cli\u003eCNC-Machined 9-Point Mirror Cell with 12V Fan\u003c\/li\u003e\n\u003cli\u003e29kg Nominal Tube Weight\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\u003eIDEAL 16 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK IDEAL 16 Optical Tube Assembly combines a massive 400mm aperture with a fast f\/4 focal ratio for unparalleled deep-sky imaging and observation. Its 1600mm focal length provides the scale for detailed planetary views, all built upon a hand-figured primary mirror guaranteed to a 1\/6 PV wavefront standard. The entire 29kg assembly is supported by a CNC-machined 9-point mirror cell, ensuring the primary optic maintains its precise figure regardless of orientation.\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\u003e400mm f\/4 Primary Mirror: A 1\/6 PV Wavefront Standard\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the IDEAL 16 is a 400mm primary mirror, hand-figured in the UK to a demanding 1\/6 PV wavefront accuracy. This grade exceeds the \"diffraction-limited\" standard, delivering visibly higher contrast on planetary details and tighter star points. The fast f\/4 focal ratio creates an incredibly bright image plane and a wide field of view, allowing you to capture vast nebulae like the North American Nebula (NGC 7000) in a single frame with reduced exposure times. Every optic is supplied with its own Zygo interferometer test report, providing certified proof of its exceptional quality.\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\u003eEngineered for Stability: 29kg Aluminium Tube and 9-Point Cell\u003c\/h3\u003e\n\u003cp\u003eA large, fast mirror is only as good as its support system. The IDEAL 16 utilizes a robust 9-point suspension mirror cell, CNC-machined for precision, to distribute the mirror's weight evenly and prevent performance-robbing flexure. The 1580mm aluminium tube keeps the total weight to a manageable 29kg, while an integrated 12-volt fan accelerates mirror cooling to ambient temperature, minimizing tube currents and ensuring sharp views sooner.\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\u003ePrecise Focusing: The Eris 2\" Rack and Pinion Focuser\u003c\/h3\u003e\n\u003cp\u003eTo handle modern imaging cameras and heavy eyepiece combinations, the IDEAL 16 is equipped with a robust Eris 2\" rack and pinion focuser. This design offers a significant advantage over simpler Crayford focusers by providing a positive, slip-free rack gear, ensuring it can hold heavy equipment without shifting focus. A smooth-locking mechanism secures your eyepiece or camera with perfect centrality to the 82mm secondary mirror, preserving the optical alignment critical for a fast f\/4 system.\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\u003eChoosing Your Grade: 1\/6 PV vs. 1\/8 PV and 1\/10 PV Optics Explained\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV wavefront optic delivers exceptional views, optional upgrades to 1\/8 PV or 1\/10 PV are available for the most demanding applications. Peak-to-Valley (PV) wavefront error measures how closely the mirror's surface matches a perfect parabola; a smaller fraction indicates a more precise figure. Upgrading from 1\/6 to 1\/10 PV yields a noticeable increase in fine detail and contrast, especially crucial for high-resolution planetary imaging where every fraction of a wavelength counts.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/6 PV (Professional Grade):\u003c\/strong\u003e The standard offering. Delivers sharp, high-contrast images far superior to mass-produced optics. Excellent for both deep-sky and planetary observing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/8 PV (Research Grade):\u003c\/strong\u003e A significant step up, providing finer resolution of details like Jupiter's cloud bands or Cassini's Division in Saturn's rings under good seeing conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/10 PV (Ultra Grade):\u003c\/strong\u003e The pinnacle of optical quality. This level of precision ensures the telescope is limited only by atmospheric conditions, not its optics, delivering the sharpest and highest-contrast images physically possible from a 400mm aperture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 kind of mount is required for the IDEAL 16 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a nominal tube weight of \u003cstrong\u003e29kg\u003c\/strong\u003e and a length of \u003cstrong\u003e1580mm\u003c\/strong\u003e, the IDEAL 16 requires a substantial equatorial mount. You should look for a mount with a payload capacity of at least 45-50kg for visual use, and preferably higher for stable astrophotography to account for cameras, guide scopes, and other accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 1\/10 PV upgrade on the IDEAL 16 worth it for imaging Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for dedicated planetary imagers, the 1\/10 PV upgrade is a significant investment. The higher surface accuracy translates directly to higher contrast on low-contrast features, such as subtle swirls in Jupiter's zones or faint festoons. While the 1\/6 PV standard is excellent, the 1\/10 PV ensures your final image resolution is limited by the atmosphere, not the telescope's mirror.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the IDEAL 16 perform on a large target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe IDEAL 16's combination of a \u003cstrong\u003e400mm\u003c\/strong\u003e aperture and \u003cstrong\u003ef\/4\u003c\/strong\u003e focal ratio is perfect for large targets like M31. The massive light-gathering ability will reveal faint outer dust lanes and companion galaxies M32 and M110 with stunning clarity. The fast focal ratio provides a wide field of view, allowing you to frame the entire galaxy with appropriate eyepieces or a full-frame camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the 9-point mirror cell on the IDEAL 16?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA large \u003cstrong\u003e400mm\u003c\/strong\u003e mirror is heavy and can deform under its own weight if not supported properly. The \u003cstrong\u003eCNC 9 point suspension\u003c\/strong\u003e cell provides precisely calculated support points across the back of the mirror. This prevents sagging and flexure as the telescope moves across the sky, maintaining the mirror's precise optical figure and ensuring sharp focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the fast f\/4 optical system of the IDEAL 16 require a coma corrector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, like all fast Newtonian telescopes, the IDEAL 16 will exhibit coma, an aberration that makes stars at the edge of the field of view appear elongated. For astrophotography or wide-field visual observation with 2\" eyepieces, using a high-quality coma corrector is essential to achieve sharp, point-like stars across the entire frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the 12-volt fan important for the IDEAL 16's 400mm mirror?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA large \u003cstrong\u003e400mm\u003c\/strong\u003e mirror has significant thermal mass and can take hours to cool to the ambient night air temperature. The integrated \u003cstrong\u003e12 volt fan\u003c\/strong\u003e actively circulates air behind the mirror, dramatically reducing this cooldown time. This minimizes \"tube currents\"—thermals rising from the mirror that distort the view—allowing you to start high-magnification observing or imaging much faster.\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\u003eNewtonian Reflector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1600mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics Upgrade Options\u003c\/td\u003e\n\u003ctd\u003e1\/8 PV, 1\/10 PV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e82mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eEris 2\" Rack and Pinion with smooth lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9 point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003e12 volt fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e434mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1580mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e29kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Finish\u003c\/td\u003e\n\u003ctd\u003eGalaxy Silver\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\"\u003eIDEAL 16 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":"Professional (1\/6 PV)","offer_id":52942606172445,"sku":"OOUK-IDEAL-16","price":7182.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942606205213,"sku":"OOUK-IDEAL-16-1-8-PV","price":7661.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942606237981,"sku":"OOUK-IDEAL-16-1-10-PV","price":8123.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-IDEAL-12-Optical-Tube-Assembly-1_5821cbd9-9929-4566-8353-d2a09b3f85f9.jpg?v=1789608284"},{"product_id":"orion-optics-uk-vx6","title":"Orion Optics UK VX6 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e150mm (6\") primary mirror diameter\u003c\/li\u003e\n\u003cli\u003e750mm focal length at a fast f\/5 focal ratio\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV wavefront optics with Zygo test report\u003c\/li\u003e\n\u003cli\u003eLightweight 4.5kg aluminium optical tube\u003c\/li\u003e\n\u003cli\u003e9-point primary mirror cell with cooling fan\u003c\/li\u003e\n\u003cli\u003e2\" focuser with reduction gearing for precise adjustment\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\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 VX6 Optical Tube Assembly\u003c\/h2\u003e\n      \u003cp\u003eThe Orion Optics UK VX6 Optical Tube Assembly packages a hand-figured, 150mm primary mirror into a lightweight 4.5kg chassis, delivering verifiable optical precision at an accessible level. With a 750mm focal length producing a fast f\/5 focal ratio, the VX6 comes standard with 1\/6 PV wavefront optics, proven by an included Zygo interferometer report, making it a powerful and portable instrument for both detailed visual observation and wide-field astrophotography.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eHand-Figured 1\/6 PV Optics: Precision You Can Verify\u003c\/h3\u003e\n      \u003cp\u003eThe core of the VX6 is its 150mm primary mirror, which is hand-finished in the UK to a guaranteed 1\/6 Peak-to-Valley (PV) wavefront accuracy. Unlike mass-produced optics with ambiguous quality claims, every VX series telescope includes a Zygo laser interferometer report, giving you documented proof of its optical precision. This standard ensures sharp, high-contrast images that resolve fine detail on planets and reveal faint structures in deep-sky objects.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eEngineered for Stability: The 9-Point Cell and 50mm Secondary\u003c\/h3\u003e\n      \u003cp\u003eOptical quality is maintained by a robust mechanical system. The primary mirror rests on a 9-point suspension cell that distributes its weight evenly, preventing flexure and preserving the mirror's precise figure regardless of the telescope's orientation. An integrated cooling fan helps the mirror reach thermal equilibrium with the ambient air quickly, minimizing tube currents and ensuring stable, sharp views from the start of your session. The 50mm secondary mirror provides full illumination for a wide range of cameras, a necessary trade-off for a fast f\/5 imaging system.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003ePortable f\/5 Imaging: The 4.5kg Aluminium Tube\u003c\/h3\u003e\n      \u003cp\u003eWeighing only 4.5kg and measuring 750mm in length, the VX6 is built for portability. Its lightweight aluminium construction allows it to be carried by a wide range of entry-level and intermediate German equatorial mounts without sacrificing stability. The fast f\/5 focal ratio captures significant light in shorter exposures, while the 2\" focuser with reduction gearing enables the fine adjustments necessary to achieve critical focus for astrophotography.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eChoosing Your Grade: 1\/6 PV vs. 1\/8 PV and 1\/10 PV Ultra\u003c\/h3\u003e\n      \u003cp\u003eWhile the standard 1\/6 PV optic delivers excellent performance, optional upgrades to 1\/8 PV (Research Grade) or 1\/10 PV (Ultra Grade) are available for the most demanding applications. Moving to a higher grade of accuracy yields visibly higher contrast and resolution on challenging targets. This is most apparent during high-magnification views of planetary details, such as the Cassini Division in Saturn's rings or subtle banding on Jupiter, where a smoother wavefront translates directly into a sharper, more stable image.\u003c\/p\u003e\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the real-world difference between the 1\/6 PV, 1\/8 PV, and 1\/10 PV optics on the VX6?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe PV (Peak-to-Valley) wavefront value measures how closely the mirror's surface matches a perfect parabola. A smaller fraction indicates a more accurate mirror. While the standard \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic is excellent for all-around observing, upgrading to \u003cstrong\u003e1\/8 PV\u003c\/strong\u003e or \u003cstrong\u003e1\/10 PV\u003c\/strong\u003e provides a noticeable increase in image sharpness and contrast, especially critical for high-resolution planetary imaging and observation.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the VX6 perform on planetary targets like Jupiter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe VX6's 150mm aperture and hand-figured optics make it a capable planetary instrument. You can expect to clearly resolve Jupiter's main cloud belts, the Great Red Spot, and its four Galilean moons. For the best results, ensure the telescope is fully cooled using the integrated fan and consider the optional 1\/8 PV or 1\/10 PV upgrades to maximize visible detail.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 4.5kg weight of the VX6 suitable for a portable GoTo mount?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, at only \u003cstrong\u003e4.5kg\u003c\/strong\u003e, the VX6 OTA is an excellent match for popular portable GoTo mounts like the Sky-Watcher HEQ5 or Celestron Advanced VX. This combination creates a powerful and easily transportable setup for both visual astronomy and astrophotography from dark sky sites.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 9-point mirror cell in the VX6 do?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003e9-point mirror cell\u003c\/strong\u003e provides uniform support for the 150mm primary mirror. This prevents the glass from sagging or deforming under its own weight as the telescope moves, which would distort the image. This robust support system is critical for maintaining the high-precision figure of the hand-finished optics.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the VX6's fan cooling make a noticeable difference?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. The integrated cooling fan actively draws air over the back of the primary mirror, helping it reach the same temperature as the outside air much faster than passive cooling alone. This minimizes \"tube currents\"—internal air turbulence that degrades image sharpness—allowing you to get stable, high-quality views much sooner after setting up.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of imaging is the VX6's f\/5 focal ratio best for?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003ef\/5 focal ratio\u003c\/strong\u003e is considered fast, making the VX6 ideal for wide-field astrophotography of large deep-sky objects like the Andromeda Galaxy (M31) or the Orion Nebula (M42). It allows you to capture more light in shorter exposure times, reducing the demands on your mount's tracking accuracy.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e750mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eStandard Optics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Upgrades\u003c\/td\u003e\n\u003ctd\u003eOptional 1\/8 PV and 1\/10 PV Ultra\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e4.5kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e750mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e167mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003e9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCooling\u003c\/td\u003e\n\u003ctd\u003eIntegrated mirror cooling fan\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eVX6 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\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":"Professional (1\/6 PV)","offer_id":52942640382237,"sku":"OOUK-VX6","price":946.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942640415005,"sku":"OOUK-VX6-1-8-PV-OPTICS","price":1017.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942640447773,"sku":"OOUK-VX6-1-10-PV-OPTICS","price":1035.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-VX6-Optical-Tube-Assembly-1_9c9b5623-b565-4cf0-8e71-35ff6bd18f4f.jpg?v=1789608512"},{"product_id":"orion-optics-uk-vx6l","title":"Orion Optics UK VX6L Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e150mm Primary Mirror\u003c\/li\u003e\n\u003cli\u003e1200mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e1\/6 PV Wavefront Standard Optical Grade\u003c\/li\u003e\n\u003cli\u003eLightweight 5kg Aluminum Tube\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 VX6L Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK VX6L Optical Tube Assembly delivers exceptional planetary and lunar contrast by pairing a 150mm primary mirror with a long 1200mm focal length. This classic f\/8 Newtonian design is built around hand-figured optics guaranteed to a 1\/6 PV wavefront accuracy, all housed in a lightweight 5kg aluminum tube supported by a 9-point mirror cell with an integrated cooling fan.\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\/6 PV Optics: Zygo-Verified Planetary and Lunar Detail\u003c\/h3\u003e\n\u003cp\u003eEvery VX6L primary mirror is hand-finished and certified to a minimum 1\/6 PV wavefront accuracy on a Zygo laser interferometer, with the test report included. This precision ensures that the maximum amount of light is focused into a single point, revealing fine details in Jupiter's cloud bands, the Cassini Division in Saturn's rings, and subtle lunar rilles. For the most demanding observers, optional upgrades to 1\/8 PV or 1\/10 PV Ultra grades are available for near-perfect optical correction.\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 f\/8 Advantage: High Contrast from a 150mm Aperture\u003c\/h3\u003e\n\u003cp\u003eThe VX6L's f\/8 focal ratio provides tangible benefits for high-magnification viewing. The long 1200mm focal length produces a less demanding light cone, making collimation easier to achieve and maintain while placing fewer demands on eyepiece correction. This design, combined with a minimal 37mm secondary mirror, maximizes image contrast by reducing the central obstruction, rendering deep sky backgrounds darker and planetary details sharper. The trade-off for this high-contrast view is a narrower field of view compared to faster f\/4 or f\/5 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\u003eVX6L Mechanical Build: A 5kg Platform for Stable Viewing\u003c\/h3\u003e\n\u003cp\u003eThe optical system is housed in a robust and lightweight aluminum tube, bringing the total weight to just 5kg. This makes the VX6L compatible with a wide range of portable equatorial mounts. The primary mirror is supported by a 9-point suspension cell to prevent flexure, and an integrated cooling fan accelerates thermal equilibrium for sharp images sooner. A 2\" focuser with reduction gearing allows for the precise, minute adjustments required to achieve critical focus at high power.\u003c\/p\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 is the real-world difference between the VX6L's standard 1\/6 PV and upgraded 1\/10 PV optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Peak-to-Valley (PV) wavefront number measures how closely the mirror's curve matches a perfect parabola. While the standard \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic provides excellent, sharp images, the \u003cstrong\u003e1\/10 PV Ultra\u003c\/strong\u003e upgrade offers a visibly higher level of contrast and resolution on challenging targets like planetary details and close double stars, especially during moments of steady seeing. The higher grade minimizes scattered light, resulting in a darker background sky and sharper focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the VX6L's f\/8 focal ratio perform on Jupiter's Great Red Spot?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe f\/8 design is ideal for observing Jupiter. The high-contrast optics will make the Great Red Spot (GRS) stand out distinctly against the surrounding cloud belts. The long focal length allows you to achieve high magnification with comfortable, longer focal length eyepieces, making it easier to resolve fine swirls and textures within the storm itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 5kg weight of the Orion Optics VX6L manageable for a portable setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. At only \u003cstrong\u003e5kg\u003c\/strong\u003e, the VX6L is an excellent choice for portable mounts in the EQ5\/AVX class. Its low weight and 1110mm length create a very stable combination that is less susceptible to wind and vibrations, allowing you to get the most out of the high-resolution optics from a backyard or dark-sky site.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a coma corrector for the Orion Optics VX6L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor visual use, a coma corrector is generally not necessary with an f\/8 Newtonian like the VX6L. Coma, the aberration that makes stars at the edge of the field look like comets, is minimal at this focal ratio. You will have a wide, well-corrected central field of view with sharp stars across most of the eyepiece view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the 9-point mirror cell in the VX6L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003e9-point mirror cell\u003c\/strong\u003e provides distributed, even support for the 150mm primary mirror. This prevents the glass from sagging under its own weight, which would distort the mirror's precisely figured shape and degrade the image. This robust support system is critical for maintaining the optical performance of the telescope at any orientation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow important is the cooling fan on the VX6L for observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe integrated cooling fan is very important for reaching peak optical performance quickly. It circulates air behind the primary mirror, helping it cool down to the ambient nighttime temperature much faster than passive cooling alone. This minimizes \"tube currents\"—internal air turbulence that can soften the image and mimic poor atmospheric seeing.\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 Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront (optional upgrades to 1\/8 PV and 1\/10 PV Ultra)\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e37mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003e9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003eIntegrated Fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Type\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e5kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e167mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1110mm\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\"\u003eVX6L 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":"Professional (1\/6 PV)","offer_id":52942641496349,"sku":"OOUK-VX6L","price":946.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942641529117,"sku":"OOUK-VX6L-1-8-PV-OPTICS","price":1017.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942641561885,"sku":"OOUK-VX6L-1-10-PV-OPTICS","price":1035.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-VX6-Optical-Tube-Assembly-1_70d693dc-4a01-4472-827c-e2cb435114da.jpg?v=1789608521"},{"product_id":"orion-optics-uk-vx8","title":"Orion Optics UK VX8 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e200mm (8-inch) Primary Mirror\u003c\/li\u003e\n\u003cli\u003e900mm Focal Length\u003c\/li\u003e\n\u003cli\u003eFast f\/4.5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV Wavefront Hand-Figured Optics\u003c\/li\u003e\n\u003cli\u003eLightweight 7kg Aluminium Tube\u003c\/li\u003e\n\u003cli\u003e2\" Focuser with Reduction Gearing\u003c\/li\u003e\n\u003cli\u003e9-Point CNC Mirror Cell with Cooling Fan\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 VX8 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK VX8 Optical Tube Assembly combines a fast f\/4.5 focal ratio with a 200mm primary mirror, hand-figured to a demanding 1\/6 PV wavefront standard and supplied with a Zygo interferometer report. Weighing a mere 7kg in its 860mm aluminium tube, this Newtonian is engineered for high-resolution imaging and deep-sky observation. The 900mm focal length provides an excellent image scale for a wide range of targets, supported by a CNC-machined 9-point mirror cell and active fan cooling.\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\u003eHand-Figured 1\/6 PV Wavefront Optics with Zygo Certification\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the VX8 is a 200mm primary mirror finished by hand to a guaranteed 1\/6 Peak-to-Valley (PV) wavefront accuracy. Unlike mass-produced optics, each mirror is individually tested on a Zygo laser interferometer, the same equipment used in professional optical labs. This process ensures the mirror's surface deviates from a perfect parabola by a tiny fraction of a wavelength of light, resulting in higher contrast, sharper stars, and the ability to resolve finer planetary detail.\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\u003eA Fast f\/4.5 System Weighing Just 7kg\u003c\/h3\u003e\n\u003cp\u003eThe VX8's f\/4.5 focal ratio is ideal for deep-sky imaging, allowing you to capture significant signal on faint nebulae and galaxies with shorter exposure times. This optical speed reduces demands on your mount's tracking accuracy and lets you complete imaging projects more efficiently. The entire assembly weighs only 7kg and has a tube length of 860mm, making it compatible with a wide range of mid-sized equatorial mounts and easy to transport to dark-sky sites.\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\u003ePrecision Focusing and Active Thermal Management\u003c\/h3\u003e\n\u003cp\u003eAchieving critical focus is essential with a fast optical system, and the VX8 is equipped with a 2\" focuser with reduction gearing for fine control. This allows for precise, minute adjustments necessary to get sharp stars across the field. The primary mirror is supported by a 9-point CNC-machined cell that prevents flexure, while an integrated cooling fan helps the mirror reach thermal equilibrium with the ambient air quickly, minimizing tube currents and ensuring your views are steady and sharp from the start of your session.\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\u003eChoosing Your Optical Grade: 1\/6 PV, 1\/8 PV, or 1\/10 PV Ultra\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV optic delivers excellent performance, Orion Optics UK offers optional upgrades for the most demanding observers. Moving from 1\/6 to 1\/8 PV provides a noticeable increase in contrast, especially valuable for resolving subtle cloud bands on Jupiter or faint detail in planetary nebulae. The 1\/10 PV \"Ultra\" grade represents the pinnacle of Newtonian optics, delivering near-perfect wavefronts for the highest possible resolution and image fidelity, revealing details that are simply lost in lesser systems.\u003c\/p\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 kind of mount do I need for the Orion Optics VX8 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a tube weight of only \u003cstrong\u003e7kg\u003c\/strong\u003e, the VX8 is quite versatile. It performs well on mid-range equatorial mounts rated for a payload capacity of 13-15kg (28-33 lbs) for imaging. This leaves ample capacity for a guide scope, camera, and other accessories without straining the mount's mechanics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the real-world difference between the 1\/6 PV and 1\/10 PV optics on the VX8?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe difference is most apparent at high magnification on high-contrast targets. On a planet like Jupiter, a \u003cstrong\u003e1\/10 PV\u003c\/strong\u003e mirror will show finer, higher-contrast detail in the cloud bands and more intricate structure in the Great Red Spot compared to the already excellent \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic. For deep-sky imaging, the higher-grade optic produces tighter, more point-like stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the VX8's f\/4.5 optics perform for imaging the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe fast \u003cstrong\u003ef\/4.5\u003c\/strong\u003e focal ratio is ideal for large, bright targets like the Orion Nebula (M42). You can capture the faint outer loops and intricate details within the Trapezium region with significantly shorter sub-exposures compared to an f\/8 or f\/10 system. For best results across the entire field, pairing the VX8 with a coma corrector is highly recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the standard 1\/6 PV VX8 good enough for resolving detail like Jupiter's Great Red Spot?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. A \u003cstrong\u003e1\/6 PV wavefront\u003c\/strong\u003e optic is a high-performance standard that easily exceeds the \"diffraction-limited\" benchmark. Under steady seeing conditions, the standard VX8 will provide sharp, detailed views of Jupiter, clearly showing the Great Red Spot, major cloud bands, and even the shadows of its Galilean moons during transits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the VX8 require a coma corrector for imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, like all fast Newtonian telescopes, the VX8 will exhibit coma, an optical aberration that makes stars at the edge of the field appear elongated. For serious astrophotography with modern sensors, using a high-quality coma corrector is essential to achieve sharp, round stars across the entire image frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the Zygo interferometer report included with the VX8 tell me?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Zygo report is a certificate of optical quality for your specific mirror. It provides a detailed map of the mirror's surface and quantifies its accuracy, including the final Peak-to-Valley (PV) wavefront error. This document is your proof that the optics meet or exceed the advertised specification (e.g., \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e), providing confidence that you have received a genuinely high-quality, hand-finished mirror.\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\u003ePrimary Mirror Diameter\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\u003e900mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optical Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront (optional upgrades to 1\/8 PV and 1\/10 PV Ultra)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e63mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e7kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e860mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e225mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Type\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003e9-point CNC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" focuser with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003eFan\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":"Professional (1\/6 PV)","offer_id":52942642479389,"sku":"OOUK-VX8","price":1688.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942642512157,"sku":"OOUK-VX8-1-8-PV-OPTICS","price":1802.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942642544925,"sku":"OOUK-VX8-1-10-PV-OPTICS","price":1833.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-VX8-Optical-Tube-Assembly-1_2a3b5723-03fc-491b-8771-1402fd3063fc.jpg?v=1789608530"},{"product_id":"orion-optics-uk-vx8l","title":"Orion Optics UK VX8L Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e200mm Primary Mirror Diameter\u003c\/li\u003e\n\u003cli\u003e1200mm Focal Length (f\/6)\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV Wavefront Optics\u003c\/li\u003e\n\u003cli\u003e8kg Nominal Tube Weight\u003c\/li\u003e\n\u003cli\u003eCNC 9-Point Mirror Cell with Cooling Fan\u003c\/li\u003e\n\u003cli\u003e2\" Focuser with Reduction Gearing\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\u003eVX8L Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK VX8L Optical Tube Assembly pairs a 200mm primary mirror with a 1200mm (f\/6) focal length, delivering high-resolution views in a lightweight 8kg package. Every VX8L is built around a primary mirror hand-figured to a guaranteed 1\/6 PV wavefront accuracy, a standard verified by Zygo interferometer testing. The OTA's physical design includes a 1130mm long aluminum tube, a 50mm secondary mirror, and a CNC-machined 9-point mirror cell for exceptional optical stability.\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\u003eGuaranteed 1\/6 PV Wavefront Optics: The Orion Optics UK Standard\u003c\/h3\u003e\n\u003cp\u003eUnlike mass-produced instruments, the VX8L's primary mirror is certified to a minimum 1\/6 PV wavefront accuracy. This figure isn't an estimate; it's a measured value from a Zygo laser interferometer, with the report supplied for your specific optic. This level of precision ensures that the light cone converges more accurately, translating directly into higher contrast on planetary details, tighter star points, and the ability to resolve finer structures in nebulae and galaxies.\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\u003eEngineered for Stability: A 9-Point Cell and 8kg Aluminium Tube\u003c\/h3\u003e\n\u003cp\u003eThe 200mm primary mirror rests on a CNC-machined 9-point flotation cell, which distributes the mirror's weight evenly to prevent sagging and induced astigmatism as the telescope moves. An integrated cooling fan accelerates thermal equilibrium, reducing tube currents for steadier views. At a nominal weight of just 8kg, the 1130mm aluminum tube is manageable for a wide range of equatorial mounts, offering significant aperture without requiring a massive support system.\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\u003ePrecision Focusing: A 2\" Focuser with Reduction Gearing\u003c\/h3\u003e\n\u003cp\u003eThe VX8L is equipped with a 2\" focuser featuring reduction gearing, allowing for both coarse and fine focus adjustments. This dual-speed control is critical for achieving sharp focus at high magnifications on planetary targets or when using a camera for astrophotography. The larger 2\" barrel accommodates wide-field eyepieces for sweeping views of star fields, and an included adapter steps down to fit standard 1.25\" accessories.\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\u003eChoosing Your Optical Grade: 1\/6 PV vs. 1\/8 PV and 1\/10 PV Ultra\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV optic delivers superb performance, Orion Optics UK offers optional upgrades for the most demanding observers. The choice depends entirely on your primary observing goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/6 PV (Standard):\u003c\/strong\u003e An excellent all-around performer providing sharp, high-contrast images that surpass standard commercial optics. It is more than sufficient for detailed visual observation and most deep-sky imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/8 PV (Professional):\u003c\/strong\u003e This grade offers a noticeable improvement in subtle planetary and lunar detail. The increase in wavefront accuracy results in higher contrast, making it easier to see faint cloud bands on Jupiter or delicate rilles on the Moon.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/10 PV (Ultra):\u003c\/strong\u003e The ultimate in optical precision. This grade is for dedicated planetary imagers and visual observers seeking to extract every last detail the 200mm aperture can resolve. The near-perfect wavefront minimizes light scatter, producing the highest possible contrast and image sharpness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 does \"1\/6 PV wavefront\" mean for my views with the VX8L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003e1\/6 PV wavefront\u003c\/strong\u003e refers to the Peak-to-Valley error of the optical surface, measured against a perfect theoretical curve. A smaller fraction indicates a more accurate mirror. This high standard, verified by a Zygo interferometer, ensures that the VX8L produces sharper stars and higher image contrast compared to typical mass-produced telescopes that do not specify a wavefront error guarantee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the VX8L's f\/6 focal ratio perform on large targets like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 1200mm focal length at f\/6 provides a versatile field of view. With a low-power 2\" eyepiece, you can easily frame large objects like the Andromeda Galaxy (M31) or the Orion Nebula (M42). While not as wide as a short-tube refractor, the f\/6 ratio offers a good balance, providing enough magnification to resolve details in galaxies and nebulae without making the field of view too restrictive.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen should I consider upgrading the VX8L to 1\/8 PV or 1\/10 PV optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou should consider an upgrade if your primary focus is high-resolution planetary or lunar observing and imaging. While the standard 1\/6 PV optic is excellent, the \u003cstrong\u003e1\/8 PV\u003c\/strong\u003e and \u003cstrong\u003e1\/10 PV\u003c\/strong\u003e upgrades provide a measurable increase in contrast and sharpness. This allows you to resolve finer details like Jupiter's cloud belts, the Cassini Division in Saturn's rings, or subtle lunar rilles more clearly, especially during nights of good seeing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow heavy is the VX8L OTA, and what kind of mount do I need?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe VX8L optical tube has a nominal weight of \u003cstrong\u003e8kg\u003c\/strong\u003e. This makes it compatible with mid-range equatorial mounts rated for payloads of approximately 13kg (28 lbs) or more, such as a Sky-Watcher HEQ5 or Celestron AVX. This relatively low weight for a 200mm Newtonian makes it a portable and accessible option for many amateur astronomers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the benefits of the 9-point mirror cell in the VX8L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eCNC 9-point mirror cell\u003c\/strong\u003e provides uniform support for the 200mm primary mirror. This prevents the glass from flexing under its own weight as the telescope's orientation changes, which would otherwise introduce optical distortions like astigmatism. This robust support system is critical for maintaining the high-quality images the hand-figured optics are capable of producing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the VX8L resolve fine detail on planets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The combination of a 200mm aperture and guaranteed 1\/6 PV optics makes the VX8L an excellent planetary instrument. At its 1200mm focal length, using a quality Barlow lens and eyepiece will allow you to push magnification to see details like Jupiter's Great Red Spot, shadow transits of its moons, and multiple cloud bands, assuming steady atmospheric conditions.\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\u003eNewtonian Reflector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\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\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics Upgrade Options\u003c\/td\u003e\n\u003ctd\u003e1\/8 PV and 1\/10 PV Ultra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" focuser with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9 point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003eIntegrated Fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e225mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1130mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e8kg (nominal)\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":"Professional (1\/6 PV)","offer_id":52942643593501,"sku":"OOUK-VX8L","price":1688.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942643626269,"sku":"OOUK-VX8L-1-8-PV-OPTICS","price":1802.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942643659037,"sku":"OOUK-VX8L-1-10-PV-OPTICS","price":1833.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-VX8-Optical-Tube-Assembly-1_ce5fff43-7f0e-4534-8efc-d1424a5f8853.jpg?v=1789608540"},{"product_id":"orion-optics-uk-vx10","title":"Orion Optics UK VX10 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e250mm (10\") Primary Mirror Diameter\u003c\/li\u003e\n\u003cli\u003e1200mm Nominal Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/4.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV Wavefront Optics\u003c\/li\u003e\n\u003cli\u003e11kg Nominal Tube Weight\u003c\/li\u003e\n\u003cli\u003eCNC 9-Point Mirror Cell with Cooling Fan\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 VX10 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK VX10 Optical Tube Assembly delivers serious deep-sky and planetary capability, built around a hand-figured 250mm primary mirror with a guaranteed 1\/6 PV wavefront accuracy. Its fast f\/4.8 focal ratio and 1200mm focal length provide a wide field of view for imaging nebulae, while the entire aluminium tube weighs a manageable 11kg. Support for the primary is provided by a CNC-machined 9-point cell, ensuring optical stability as you move across the sky.\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\u003e250mm Aperture at a Fast f\/4.8\u003c\/h3\u003e\n\u003cp\u003eWith a 250mm (10-inch) primary mirror, the VX10 gathers enough light to resolve faint galaxy arms and dust lanes in nebulae from a dark sky site. The 1200mm focal length and f\/4.8 ratio create a bright image plane and a wide true field of view, allowing you to frame large targets like the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000) with a suitable wide-field eyepiece or camera sensor. The 63mm secondary mirror provides even illumination for many popular imaging sensors, though for astrophotography, a coma corrector is recommended to achieve pinpoint stars across the entire field of this fast optical system.\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\/6 PV Wavefront Accuracy with Zygo-Verified Upgrades\u003c\/h3\u003e\n\u003cp\u003eEvery VX10 includes a primary mirror hand-figured in the UK to a minimum standard of 1\/6 PV wavefront accuracy, a grade many manufacturers consider premium. This precision ensures sharp, high-contrast views, especially noticeable during high-magnification observations of planets and the Moon. Each optic is certified with a Zygo laser interferometer report.\u003c\/p\u003e\n\u003cp\u003eFor those seeking the highest possible resolution, the VX10 offers optional upgrades to 1\/8 PV (Research Grade) or 1\/10 PV (Ultra) optics. Moving to a higher grade minimizes the peak-to-valley wavefront error, translating directly to finer detail resolution on challenging targets like Jupiter's cloud bands or Cassini's Division in Saturn's rings under steady seeing conditions.\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 11kg Tube with a 9-Point Mirror Cell\u003c\/h3\u003e\n\u003cp\u003eThe VX10's engineering focuses on thermal and mechanical stability without excessive weight. The aluminium tube, measuring 1140mm long and 280mm in diameter, brings the total OTA weight to a nominal 11kg, making it compatible with a wide range of equatorial mounts in the EQ6 class. The primary mirror is supported by a CNC-machined 9-point flotation cell that prevents flexure, and an integrated cooling fan helps the mirror reach ambient temperature quickly for stable, sharp images. A 2\" focuser with reduction gearing is fitted for precise, repeatable focusing, critical for both visual observation and imaging.\u003c\/p\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 does \"1\/6 PV wavefront\" mean for the Orion Optics UK VX10?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003ePV wavefront\u003c\/strong\u003e measures the peak-to-valley error of the mirror's surface compared to a perfect parabola. A smaller fraction indicates a more accurate mirror. The VX10's standard \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e is a high-performance specification that ensures sharp, high-contrast images, exceeding the \"diffraction-limited\" standard of 1\/4 PV used by many mass-producers. Every Orion Optics UK mirror is supplied with a Zygo interferometer test report to certify its quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs it worth upgrading the VX10 optics to 1\/8 PV or 1\/10 PV?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor visual observers and imagers focused on planetary detail, the upgrade is significant. While the standard 1\/6 PV optic is excellent, moving to \u003cstrong\u003e1\/8 PV (Research Grade)\u003c\/strong\u003e or \u003cstrong\u003e1\/10 PV (Ultra Grade)\u003c\/strong\u003e provides a noticeable increase in image contrast and the ability to resolve finer details under good seeing conditions. If your primary goal is capturing the subtlest features on Jupiter, Saturn, or Mars, the higher-grade optics will deliver superior results.\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 11kg VX10 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a nominal tube weight of \u003cstrong\u003e11kg\u003c\/strong\u003e, the VX10 optical tube requires a sturdy equatorial mount. For visual use, a mount in the EQ5\/CG-5 class might suffice, but for astrophotography, a mount with a higher payload capacity like a Sky-Watcher EQ6-R Pro, Celestron CGEM II, or similar is strongly recommended to handle the OTA's weight and 1140mm length, ensuring 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 VX10's f\/4.8 focal ratio affect imaging of the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003ef\/4.8\u003c\/strong\u003e focal ratio is considered fast, which is a major advantage for deep-sky imaging. It allows you to collect a strong signal on faint objects like the Orion Nebula (M42) with shorter sub-exposure times compared to a slower f\/8 or f\/10 system. This reduces demands on your mount's tracking and allows you to capture more data in a single session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I see a difference between the VX10 optical grades on Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, assuming good atmospheric seeing. While the standard \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic will show Jupiter's main cloud belts and the Great Red Spot clearly, upgrading to \u003cstrong\u003e1\/8 PV\u003c\/strong\u003e or \u003cstrong\u003e1\/10 PV\u003c\/strong\u003e allows the telescope to resolve finer, lower-contrast details. This includes smaller storms, subtle shading differences within the belts, and intricate festoons. The more perfect the mirror's surface, the less light scatters, resulting in a higher-contrast image that holds up better at very high magnifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is included with the Orion Optics UK VX10 tube assembly?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe VX10 optical tube assembly is fitted with a \u003cstrong\u003e2\" focuser with reduction gearing\u003c\/strong\u003e and a 9-point mirror cell with a cooling fan. Please note that accessories such as eyepieces, a finder scope, and mounting rings are typically sold separately to allow you to configure the telescope to your specific needs.\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\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e250mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optical Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Upgrades\u003c\/td\u003e\n\u003ctd\u003eOptional 1\/8 PV and 1\/10 PV Ultra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e63mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e11kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1140mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e280mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003eIntegrated Fan\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":"Professional (1\/6 PV)","offer_id":52942644674845,"sku":"OOUK-VX10","price":2245.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942644707613,"sku":"OOUK-VX10-1-8-PV-OPTICS","price":2380.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942644740381,"sku":"OOUK-VX10-1-10-PV-OPTICS","price":2483.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-VX10-Optical-Tube-Assembly-1_1ea36d66-29a1-45c5-a0ed-5af5252af4f9.jpg?v=1789608549"},{"product_id":"orion-optics-uk-vx10l","title":"Orion Optics UK VX10L Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e250mm (10-inch) primary mirror for exceptional light-gathering\u003c\/li\u003e\n\u003cli\u003e1600mm focal length at f\/6.3, ideal for both planetary and deep-sky observation\u003c\/li\u003e\n\u003cli\u003eStandard hand-figured optics with a 1\/6 PV wavefront accuracy\u003c\/li\u003e\n\u003cli\u003eLightweight 12kg aluminium tube for easier mounting and transport\u003c\/li\u003e\n\u003cli\u003eCNC-machined 9-point mirror cell with integrated cooling fan\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 VX10L Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK VX10L delivers high-resolution performance through its 250mm primary mirror and 1600mm (f\/6.3) focal length. Every VX10L is built around hand-figured optics certified to a minimum 1\/6 PV wavefront accuracy, supported by a 9-point CNC-machined mirror cell for consistent optical alignment. The entire assembly weighs a manageable 12kg, thanks to its 1550mm aluminium tube, making it compatible with a wide range of 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\u003e250mm f\/6.3 Optics: The Foundation for High-Resolution Views\u003c\/h3\u003e\n\u003cp\u003eWith a 250mm (10-inch) aperture, the VX10L gathers enough light to resolve faint galaxies and bring out fine detail in nebulae like the Orion Nebula (M42). The 1600mm focal length and f\/6.3 focal ratio provide a versatile balance, offering enough image scale for high-magnification views of Jupiter's cloud bands and Saturn's rings, while remaining wide enough for framing larger deep-sky targets.\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\/6 PV to 1\/10 PV: Choosing Your Level of Optical Precision\u003c\/h3\u003e\n\u003cp\u003eOrion Optics UK hand-figures every mirror to a verified peak-to-valley (PV) wavefront accuracy, measured with a Zygo laser interferometer. The standard VX10L includes 1\/6 PV optics, a grade that already surpasses mass-produced alternatives and delivers sharp, high-contrast images. For the most demanding applications, optional upgrades to 1\/8 PV or 1\/10 PV Ultra are available.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/6 PV (Professional Grade):\u003c\/strong\u003e The standard offering, providing excellent views for all astronomical subjects with noticeably higher contrast than typical commercial newtonians.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/8 PV (Research Grade):\u003c\/strong\u003e A significant step up, this grade minimizes wavefront error to a level where planetary and lunar details become crisper and more stable, especially during moments of good seeing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/10 PV (Ultra Grade):\u003c\/strong\u003e The highest level of correction available. This grade ensures the optical system is performing at the theoretical limit, extracting the maximum possible detail and contrast from any target.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEngineered for Stability: 12kg Tube and 9-Point CNC Mirror Cell\u003c\/h3\u003e\n\u003cp\u003eThe VX10L's mechanical design ensures its optics perform consistently. The primary mirror rests on a 9-point flotation cell, precision-machined from CNC aluminum to distribute the mirror's weight evenly and prevent surface distortion. An integrated cooling fan helps the 250mm mirror reach thermal equilibrium with the ambient air quickly, reducing tube currents and sharpening the image.\u003c\/p\u003e\n\u003cp\u003eDespite its 1550mm length, the aluminium tube keeps the total weight to just 12kg, placing it within the capacity of many mid-range equatorial mounts. Focusing is managed by a 2\" focuser with reduction gearing, allowing for fine, precise adjustments critical for high-magnification visual work and astrophotography.\u003c\/p\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 is the visible difference between the 1\/6 PV and 1\/10 PV optics on the VX10L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optics provide excellent, sharp views, upgrading to \u003cstrong\u003e1\/10 PV Ultra\u003c\/strong\u003e optics on the Orion Optics UK VX10L yields a noticeable increase in contrast and fine detail, particularly on high-magnification targets like planets and the Moon. You'll observe subtler cloud bands on Jupiter, finer detail in Saturn's rings, and sharper resolution on close double stars. Each mirror grade comes with a Zygo interferometer test report verifying its accuracy.\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 Orion Optics UK VX10L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe VX10L OTA weighs \u003cstrong\u003e12kg\u003c\/strong\u003e. For visual use, a mount with a payload capacity of at least 15-18kg (e.g., Sky-Watcher EQ6-R Pro) is recommended to ensure stability. For long-exposure astrophotography, a mount with a higher capacity of 20kg or more would be ideal to handle the additional weight of a camera, guide scope, and other accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the VX10L's f\/6.3 focal ratio affect astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003ef\/6.3\u003c\/strong\u003e focal ratio is a versatile middle ground. It's fast enough to capture significant data on deep-sky objects in a reasonable amount of time without requiring the extreme precision of faster f\/4 systems. It also provides a \u003cstrong\u003e1600mm\u003c\/strong\u003e focal length, which gives good image scale for smaller galaxies and planetary nebulae without needing aggressive barlows or powermates.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the VX10L with standard 1\/6 PV optics good enough for resolving the Cassini Division on Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The \u003cstrong\u003e250mm\u003c\/strong\u003e aperture of the VX10L provides more than enough resolving power to see the Cassini Division. The standard \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optics will deliver a sharp enough image to clearly define the gap in Saturn's rings, provided atmospheric seeing conditions are favorable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the cooling fan on the VX10L's mirror cell important?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe fan helps the large \u003cstrong\u003e250mm\u003c\/strong\u003e primary mirror cool down to the ambient nighttime temperature more quickly. This minimizes \"tube currents\"—thermals rising from a warm mirror—which distort the view and soften the image. Using the fan for 20-30 minutes before observing ensures you get the sharpest possible views from the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I see detail in the spiral arms of the Whirlpool Galaxy (M51) with the Orion Optics UK VX10L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Under dark skies, the \u003cstrong\u003e250mm\u003c\/strong\u003e aperture of the VX10L is capable of resolving the spiral structure of brighter galaxies like M51. The high-contrast optics, especially the \u003cstrong\u003e1\/8 PV\u003c\/strong\u003e or \u003cstrong\u003e1\/10 PV\u003c\/strong\u003e upgrades, will make this structure more apparent, revealing the bridge of stars connecting M51 to its companion galaxy, NGC 5195.\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\u003eNewtonian Reflector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e250mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1600mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optical Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV Wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Optical Upgrades\u003c\/td\u003e\n\u003ctd\u003e1\/8 PV and 1\/10 PV Ultra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC Machined 9-Point Suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003eIntegrated Fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e12kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1550mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e280mm\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":"Professional (1\/6 PV)","offer_id":52942645788957,"sku":"OOUK-VX10L","price":2245.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942645821725,"sku":"OOUK-VX10L-1-8-PV-OPTICS","price":2380.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942645854493,"sku":"OOUK-VX10L-1-10-PV-OPTICS","price":2483.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-VX10-Optical-Tube-Assembly-1_e975d474-4065-4dc6-b476-1f246dc63a7c.jpg?v=1789608559"},{"product_id":"orion-optics-uk-vx12","title":"Orion Optics UK VX12 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e300mm (12\") primary mirror diameter\u003c\/li\u003e\n\u003cli\u003e1200mm nominal focal length\u003c\/li\u003e\n\u003cli\u003eFast f\/4 focal ratio\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV wavefront optical grade\u003c\/li\u003e\n\u003cli\u003eLightweight 14kg aluminium tube\u003c\/li\u003e\n\u003cli\u003eCNC-machined 9-point mirror cell with cooling fan\u003c\/li\u003e\n\u003cli\u003e2\" focuser with reduction gearing\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 VX12 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK VX12 combines a large 300mm aperture with a fast f\/4 focal ratio, delivering exceptional light-gathering power for deep-sky imaging. Its 1200mm focal length is supported by a primary mirror hand-figured to a 1\/6 PV wavefront standard, ensuring high-contrast views. The entire optical tube weighs a manageable 14kg thanks to its aluminium construction, while the 9-point CNC mirror cell provides rigid, stable support for the primary optics.\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 300mm f\/4 Primary: Hand-Figured 1\/6 PV Optics\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the VX12 is a 300mm parabolic primary mirror, engineered for serious imaging. The fast f\/4 focal ratio dramatically reduces exposure times, allowing you to capture faint details in galaxies and nebulae more efficiently. Every VX12 mirror is hand-finished and tested on a Zygo interferometer to guarantee its stated optical quality, with the standard 1\/6 PV wavefront grade delivering sharp, high-contrast images that outperform mass-produced alternatives.\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\u003eVX12 Mechanical Systems: A 14kg OTA with 9-Point Mirror Support\u003c\/h3\u003e\n\u003cp\u003eThe VX12 is built for stability without excessive weight. The 1160mm aluminium tube keeps the assembly at a nominal 14kg, making it compatible with a wide range of mid-to-heavy-duty equatorial mounts. Inside, the primary mirror rests on a CNC-machined 9-point flotation cell that distributes its weight evenly, preventing flexure and preserving optical alignment. An integrated cooling fan accelerates thermal equilibrium, reducing tube currents and ensuring your telescope is ready for imaging sooner.\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\u003eDesigned for Imaging: 2\" Focuser and Fast f\/4 Focal Ratio\u003c\/h3\u003e\n\u003cp\u003eEvery component of the VX12 is selected to support astrophotography. The 2\" focuser includes reduction gearing, providing the fine control needed to achieve critical focus with a modern CMOS or CCD camera. The 75mm secondary mirror is sized to provide ample illumination for larger sensors, minimizing vignetting across the field. This combination makes the VX12 a powerful light-gathering instrument for capturing everything from wide-field nebulae to distant galaxy clusters.\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\u003eChoosing Your Optical Grade: 1\/6 PV vs. 1\/10 PV Ultra Optics\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV wavefront optic is an excellent performer, Orion Optics UK offers upgrades for the most demanding applications. A higher-grade mirror concentrates more light into the central Airy disk, resulting in visibly higher contrast, especially on fine planetary detail. This is a direct trade-off between cost and optical perfection.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/6 PV (Professional Grade):\u003c\/strong\u003e The standard option, providing excellent, sharp images for both deep-sky and planetary work. A significant step up from typical commercial optics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/8 PV (Research Grade):\u003c\/strong\u003e A premium upgrade for those seeking finer detail. You will notice improved contrast on features like Jupiter's cloud bands and the Cassini Division in Saturn's rings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/10 PV (Ultra Grade):\u003c\/strong\u003e The highest level of correction available. This grade ensures the optical system is performing at the theoretical limit, revealing the most subtle details the atmosphere and your seeing conditions will allow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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\"\u003eFor planetary imaging of Jupiter with the VX12, is the 1\/10 PV Ultra upgrade worth it?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for dedicated planetary imagers, the 1\/10 PV Ultra upgrade makes a noticeable difference. The higher wavefront accuracy increases contrast, which is critical for resolving fine, low-contrast details like small ovals, festoons in Jupiter's cloud belts, and subtle lunar rilles. While the standard 1\/6 PV optic is very capable, the 1\/10 PV ensures you are capturing the maximum possible detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the f\/4 focal ratio of the VX12 affect imaging the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe fast f\/4 ratio is a major advantage for targets like the Orion Nebula (M42). Compared to an f\/8 system, the VX12 gathers light four times faster, meaning you can achieve the same signal-to-noise ratio in a fraction of the time. This allows for shorter individual sub-exposures, which can reduce guiding errors and capture the faint outer nebulosity more effectively.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the standard 1\/6 PV wavefront accuracy of the VX12 mean in practice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA 1\/6 PV (Peak-to-Valley) wavefront error means the mirror surface deviates from a perfect parabola by no more than one-sixth the wavelength of light. This is a high standard that results in sharp, high-contrast images with tightly focused stars. It significantly exceeds the \"diffraction-limited\" standard (1\/4 PV) used as a benchmark for quality optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the VX12's 14kg tube weight suitable for a mid-range equatorial mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe nominal 14kg weight of the VX12 OTA is at the upper end for many mid-range mounts when used for imaging. While a mount rated for 20kg (44 lbs) might carry it visually, for astrophotography you must also account for the weight of your camera, guide scope, and other accessories. A mount in the 25-30kg (55-66 lb) payload class is recommended for stable, long-exposure imaging with the VX12.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the Orion Optics UK VX12 include a cooling fan?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe integrated fan on the primary mirror cell is essential for reaching thermal equilibrium. A large 300mm mirror can take a long time to cool to the ambient night air temperature. The fan accelerates this process, which minimizes \"tube currents\"—internal air turbulence that can distort the image and reduce sharpness. Using the fan for 30-60 minutes before observing or imaging ensures the best possible performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need a coma corrector with the f\/4 VX12 for imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for astrophotography with the f\/4 VX12, a coma corrector is essential. All fast Newtonian telescopes naturally exhibit coma, an aberration that makes stars at the edge of the field of view appear elongated. A high-quality coma corrector will ensure sharp, point-like stars across the entire frame, which is critical when using cameras with medium to large sensors.\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\u003eNewtonian Reflector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1200mm (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optical Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Grade Upgrades\u003c\/td\u003e\n\u003ctd\u003e1\/8 PV and 1\/10 PV Ultra available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC machined 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003eIntegrated Fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e14kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e326mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1160mm\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\"\u003eVX12 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\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":"Professional (1\/6 PV)","offer_id":52942646870301,"sku":"OOUK-VX12","price":2993.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942646903069,"sku":"OOUK-VX12-1-8-PV-OPTICS","price":3179.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942646935837,"sku":"OOUK-VX12-1-10-PV-OPTICS","price":3376.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-VX12-Optical-Tube-Assembly-1_0749119e-f132-4b84-8ff2-0e78ded69e31.jpg?v=1789608568"},{"product_id":"orion-optics-uk-vx12l","title":"Orion Optics UK VX12L Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e300mm (12\") Primary Mirror\u003c\/li\u003e\n\u003cli\u003e1600mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/5.3 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV Wavefront Hand-Figured Optics\u003c\/li\u003e\n\u003cli\u003eCNC-Machined 9-Point Mirror Cell with Cooling Fan\u003c\/li\u003e\n\u003cli\u003e16kg Nominal Tube Weight\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 VX12L Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK VX12L combines a large 300mm aperture with a 1600mm focal length in a versatile f\/5.3 Newtonian design. This optical tube is built around a hand-figured primary mirror guaranteed to a 1\/6 PV wavefront accuracy, with each optic verified by a Zygo interferometer report. Weighing a manageable 16kg for its size, the aluminium tube is supported by a CNC-machined 9-point mirror cell designed for stable, high-contrast 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\u003eHand-Figured 1\/6 PV Primary Mirror: Zygo-Verified Precision\u003c\/h3\u003e\n\u003cp\u003eThe heart of the VX12L is its 300mm primary mirror, which is hand-finished in the UK to a minimum 1\/6 Peak-to-Valley (PV) wavefront accuracy. This standard is significantly higher than typical mass-produced optics and ensures sharp, high-contrast views. Every mirror is tested on a Zygo laser interferometer, the same equipment used in professional optical labs, and is supplied with its own test report to certify its quality.\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 VX12L's 9-Point Cell and Active Cooling System\u003c\/h3\u003e\n\u003cp\u003eTo maintain optical alignment and performance, the 300mm mirror is supported by a computer-optimized, CNC-machined 9-point flotation cell. This cell distributes the mirror's weight evenly, preventing astigmatism and other distortions as the telescope moves. An integrated cooling fan accelerates thermal equilibrium, reducing tube currents and ensuring the sharpest possible images from the start of your session.\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\u003eImaging with a 300mm f\/5.3 Newtonian\u003c\/h3\u003e\n\u003cp\u003eWith its 300mm aperture, the VX12L gathers a tremendous amount of light, resolving faint details in distant galaxies and nebulae. The 1600mm focal length provides the image scale needed for detailed views of the Moon and planets, while the f\/5.3 focal ratio is fast enough to capture deep-sky objects with reasonably short exposure times. The instrument includes a 2\" focuser with reduction gearing for the fine adjustments necessary to achieve critical focus, especially for astrophotography.\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\u003eChoosing Your Optical Grade: 1\/6 PV vs. 1\/8 PV and 1\/10 PV Ultra\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV optic delivers excellent images, Orion Optics UK offers upgrades for the most demanding observers. Moving to a 1\/8 PV or 1\/10 PV 'Ultra' mirror provides a tangible increase in image fidelity, most noticeable during high-magnification planetary viewing. A more accurate wavefront concentrates more light into the central Airy disk, resulting in higher contrast on subtle details like Jupiter's cloud bands or the Cassini Division in Saturn's rings under steady seeing conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/6 PV (Standard):\u003c\/strong\u003e An excellent all-around choice for visual and imaging, far exceeding the quality of standard commercial telescopes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/8 PV (Professional):\u003c\/strong\u003e A noticeable step up for dedicated lunar and planetary observers, delivering higher contrast and finer detail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/10 PV (Ultra):\u003c\/strong\u003e The ultimate in optical precision, for those seeking to extract every last bit of resolution possible from a 300mm aperture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 is the real-world difference between the 1\/6 PV, 1\/8 PV, and 1\/10 PV optics on the VX12L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe difference is most apparent at high magnification on high-contrast targets. While the \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic provides excellent, sharp views, upgrading to \u003cstrong\u003e1\/8 PV\u003c\/strong\u003e or \u003cstrong\u003e1\/10 PV\u003c\/strong\u003e increases image contrast and stability. You'll notice finer details on planets, tighter star points, and better resolution of close double stars. The 1\/10 PV 'Ultra' grade represents the practical limit of hand-figuring, ensuring the image is limited by atmospheric seeing, not the mirror itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the VX12L perform on a target like the Orion Nebula (M42) at f\/5.3?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Orion Optics UK VX12L is an exceptional instrument for large, bright nebulae like M42. The \u003cstrong\u003e300mm aperture\u003c\/strong\u003e gathers enough light to reveal faint outer loops and intricate detail within the Trapezium region. The \u003cstrong\u003ef\/5.3\u003c\/strong\u003e focal ratio provides a wide field of view with a coma corrector, allowing you to frame the entire nebula while being fast enough for efficient imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the VX12L resolve details like the Cassini Division on Saturn with the standard 1\/6 PV optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The \u003cstrong\u003e300mm aperture\u003c\/strong\u003e has more than enough theoretical resolution to easily show the Cassini Division, and the guaranteed \u003cstrong\u003e1\/6 PV wavefront\u003c\/strong\u003e quality of the standard optics ensures the telescope can deliver that resolution in practice. Seeing conditions will be the limiting factor, but on a steady night, the VX12L will provide sharp, detailed views of Saturn.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the VX12L's 9-point mirror cell protect the optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eCNC-machined 9-point cell\u003c\/strong\u003e provides uniform support for the 300mm primary mirror across its entire surface. This prevents the mirror from sagging under its own weight as the telescope points to different parts of the sky, which would otherwise induce astigmatism and degrade the image. This precise support is critical for maintaining the mirror's hand-figured accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 16kg weight of the VX12L manageable for portable setups?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAt \u003cstrong\u003e16kg\u003c\/strong\u003e, the VX12L optical tube is relatively lightweight for a 12\" Newtonian, thanks to its aluminium construction. While not a grab-and-go instrument, it can be transported and set up by one person. It requires a substantial equatorial mount (EQ6-R Pro class or larger) to carry it effectively for visual use or astrophotography.\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 Orion Optics UK VX12L OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDue to its \u003cstrong\u003e16kg weight\u003c\/strong\u003e and \u003cstrong\u003e1510mm length\u003c\/strong\u003e, the VX12L requires a heavy-duty equatorial mount. For visual observing, a mount with a payload capacity of at least 20kg (44 lbs) is recommended. For astrophotography, a mount with an even higher capacity, such as a Sky-Watcher EQ8-R Pro or similar, is necessary to ensure stability and precise tracking.\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\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1600mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optical Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Upgrade Options\u003c\/td\u003e\n\u003ctd\u003e1\/8 PV and 1\/10 PV Ultra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e63mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9 point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003eIntegrated Fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e16kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e326mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1510mm\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":"Professional (1\/6 PV)","offer_id":52942648017181,"sku":"OOUK-VX12L","price":2993.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942648049949,"sku":"OOUK-VX12L-1-8-PV-OPTICS","price":3179.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942648082717,"sku":"OOUK-VX12L-1-10-PV-OPTICS","price":3376.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/OrionOpticsUK-VX12-Optical-Tube-Assembly-1_82cb4f44-7966-4c8c-be76-70b036828933.jpg?v=1789608578"},{"product_id":"orion-optics-uk-vx14","title":"Orion Optics UK VX14 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e350mm (14\") primary mirror diameter\u003c\/li\u003e\n\u003cli\u003e1600mm nominal focal length\u003c\/li\u003e\n\u003cli\u003eFast f\/4.6 focal ratio\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV wavefront optical accuracy, certified by Zygo report\u003c\/li\u003e\n\u003cli\u003e9-point CNC-machined mirror cell\u003c\/li\u003e\n\u003cli\u003e2\" focuser with reduction gearing\u003c\/li\u003e\n\u003cli\u003eOnboard fan for rapid mirror cooling\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 VX14 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK VX14 Optical Tube Assembly combines a massive 350mm aperture with a fast f\/4.6 focal ratio for breathtaking deep-sky imaging and high-resolution planetary views. Its 1600mm focal length is built around a primary mirror hand-figured to a standard 1\/6 PV wavefront accuracy, with each unit verified by a Zygo interferometer report. The entire assembly weighs a manageable 22kg, housed in a 1540mm aluminium tube equipped with a 9-point CNC mirror cell and an integrated cooling fan for thermal stability.\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 350mm f\/4.6 Primary Mirror: 1\/6 PV Wavefront Accuracy\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the VX14 is a hand-finished 350mm primary mirror, delivering the light-gathering power needed to resolve faint details in distant galaxies and nebulae. The f\/4.6 focal ratio provides a wide field of view and reduces exposure times for astrophotography. Every VX14 is guaranteed to have a minimum optical quality of 1\/6 PV wavefront, ensuring sharp, high-contrast images free from the aberrations common in mass-produced optics.\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\u003e9-Point CNC Cell and Active Cooling in a 22kg Tube\u003c\/h3\u003e\n\u003cp\u003eA mirror of this size requires exceptional support to maintain its figure. The VX14 uses a CNC-machined 9-point flotation cell that distributes the mirror's weight evenly, preventing flexure and preserving optical alignment as the telescope moves. An integrated cooling fan accelerates thermal equilibrium, reducing mirror-induced air currents and stabilizing the image much faster than a passive system. These components are housed in a rigid, 385mm diameter aluminium tube, keeping the total OTA weight to 22kg.\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\u003eImaging-Ready 2\" Focuser with Reduction Gearing\u003c\/h3\u003e\n\u003cp\u003eThe VX14 is equipped with a robust 2\" focuser featuring reduction gearing, allowing for precise, minute adjustments critical for achieving sharp focus, especially with the fast f\/4.6 optical system. This is essential for both high-magnification visual work and astrophotography where critical focus is non-negotiable. The large 2\" barrel accommodates wide-field eyepieces and modern imaging cameras without vignetting.\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\u003eVX14 Optical Grades Explained: 1\/6 PV vs. 1\/8 PV vs. 1\/10 PV Ultra\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV wavefront optics deliver exceptional views, Orion Optics UK offers two higher grades for the most demanding observers. The choice depends entirely on your primary targets and observing goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/6 PV Wavefront (Professional):\u003c\/strong\u003e This grade provides excellent, sharp images across all astronomical targets. It is a significant step up from typical commercial telescopes and is ideal for deep-sky imaging and general observing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/8 PV Wavefront (Research):\u003c\/strong\u003e The upgrade to 1\/8 PV offers a noticeable increase in contrast and fine detail, particularly on the Moon and planets. Faint planetary details like Jupiter's cloud festoons and the Cassini Division in Saturn's rings become more distinct.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/10 PV Wavefront (Ultra):\u003c\/strong\u003e Representing the pinnacle of Newtonian optics, the 1\/10 PV Ultra grade delivers the highest possible contrast and resolution. This level of correction allows the telescope to perform at its theoretical limit, revealing the most subtle planetary and lunar features the atmosphere will allow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 class of mount is required for the VX14 OTA's 22kg weight?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a tube weight of \u003cstrong\u003e22kg (approx. 48.5 lbs)\u003c\/strong\u003e, plus the weight of a finder, camera, and other accessories, you should use a mount with a payload capacity of at least 60-70 lbs for imaging. Mounts in the EQ8, Losmandy G11, or Paramount class are recommended to handle the VX14's weight and 1540mm length.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the VX14's f\/4.6 focal ratio good for imaging galaxies like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003ef\/4.6 focal ratio\u003c\/strong\u003e is excellent for imaging large deep-sky objects like the Andromeda Galaxy (M31). It allows you to collect a significant amount of light in a shorter time compared to slower f\/8 or f\/10 systems. For edge-to-edge sharp stars across a large sensor, pairing the VX14 with a high-quality coma corrector is essential.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the real difference I'll see between the standard 1\/6 PV and 1\/10 PV Ultra optics on Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the standard \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic will show you Jupiter's main cloud belts and moons clearly, the \u003cstrong\u003e1\/10 PV Ultra\u003c\/strong\u003e upgrade provides a higher level of contrast and sharpness. This translates to seeing more subtle detail within the belts, smaller storms and ovals, and a more defined edge on the planet's limb, assuming seeing conditions are good.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the 75mm secondary mirror on the VX14 cause a large obstruction?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e75mm secondary mirror\u003c\/strong\u003e results in a 21.4% central obstruction by diameter. This is a very reasonable figure for a fast f\/4.6 Newtonian designed for both visual and photographic use, balancing the need for a fully illuminated field for imaging with the desire for high contrast for visual observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the fan cooling on the VX14 improve my views?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe integrated \u003cstrong\u003ecooling fan\u003c\/strong\u003e helps the 350mm primary mirror reach the ambient nighttime temperature more quickly. This minimizes \"tube currents\"—warm air rising from the mirror—which can distort the image and make it look wavy, like viewing over hot pavement. The result is a steadier, sharper image sooner in your observing session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 1.25\" eyepieces with the VX14's 2\" focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003e2\" focuser with reduction gearing\u003c\/strong\u003e typically includes a 1.25\" adapter, allowing you to use both 2\" and 1.25\" format eyepieces and accessories. This gives you the flexibility to use a wide range of eyepieces for both wide-field and high-power views.\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\u003eNewtonian Reflector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1600mm (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Optics Upgrades\u003c\/td\u003e\n\u003ctd\u003e1\/8 PV and 1\/10 PV Ultra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" focuser with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003eCNC 9-point suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003eIntegrated Fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Type\u003c\/td\u003e\n\u003ctd\u003eSolid Tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e385mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1540mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e22kg (nominal)\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\"\u003eVX14 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":"Professional (1\/6 PV)","offer_id":52942649032989,"sku":"OOUK-VX14","price":5539.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942649065757,"sku":"OOUK-VX14-1-8-PV-OPTICS","price":5705.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942649098525,"sku":"OOUK-VX14-1-10-PV-OPTICS","price":5953.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_f4f245fb-4910-45ed-91bf-b5a981d83f3d.jpg?v=1789608587"},{"product_id":"orion-optics-uk-vx16","title":"Orion Optics UK VX16 Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e400mm (16\") primary mirror diameter\u003c\/li\u003e\n\u003cli\u003e1600mm focal length at a fast f\/4 focal ratio\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV wavefront optics, Zygo-certified\u003c\/li\u003e\n\u003cli\u003e9-point CNC-machined mirror cell for optimal support\u003c\/li\u003e\n\u003cli\u003e29kg nominal tube weight in a rigid aluminium tube\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 VX16 Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK VX16 Optical Tube Assembly combines a massive 400mm aperture with a fast f\/4 focal ratio, creating a powerful instrument for serious deep-sky imaging. Every VX16 is built around a hand-figured primary mirror with a certified standard accuracy of 1\/6 PV wavefront, delivering incredibly sharp, high-contrast views. The rigid aluminium tube weighs a manageable 29kg and houses the primary in a 9-point CNC-machined mirror cell, ensuring optical stability and rapid thermal equilibrium with its integrated cooling fan.\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\u003e400mm f\/4 Primary: Certified 1\/6 PV Wavefront Accuracy\u003c\/h3\u003e\n\u003cp\u003eThe heart of the VX16 is its 400mm, 1600mm focal length primary mirror. The fast f\/4 optical system gathers immense amounts of light, drastically reducing exposure times on faint nebulae and galaxies. Unlike mass-produced optics, each VX mirror is hand-finished and certified on a Zygo laser interferometer to a minimum standard of 1\/6 PV wavefront accuracy—a significant step up from the common 1\/4 PV \"diffraction-limited\" benchmark. This higher precision translates directly to sharper stars, finer detail, and higher contrast, with a certificate to prove it.\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\u003e29kg Aluminium Tube: 9-Point Cell and Active Cooling\u003c\/h3\u003e\n\u003cp\u003eOrion Optics UK engineered the VX16 for mechanical stability without excessive weight. The 29kg aluminium optical tube is rigid enough to handle large cameras and accessories while remaining manageable for heavy-duty equatorial mounts. To protect the primary mirror's performance, a CNC-machined 9-point flotation cell provides uniform support, preventing gravity-induced flexure that can harm image quality. An integrated cooling fan accelerates mirror acclimation, minimizing tube currents and ensuring your images are as sharp as the optics allow from the start of your session.\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\u003eChoosing Your Optics: 1\/6 PV Standard vs. the 1\/10 PV Ultra Upgrade\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV wavefront optics deliver exceptional views, the VX16 offers upgrades for the most demanding applications. Moving to 1\/8 PV or the pinnacle 1\/10 PV Ultra grade refines the optical surface to near-perfection. This obsessive level of accuracy yields the highest possible image contrast, critical for resolving subtle cloud bands on Jupiter, separating tight double stars, and capturing the faintest wisps of nebulosity. For planetary imagers or visual observers seeking the ultimate in sharpness, the 1\/10 PV Ultra upgrade transforms the VX16 into a truly world-class instrument.\u003c\/p\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 VX16 Optical Tube Assembly ideal for deep-sky imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe VX16's combination of a huge \u003cstrong\u003e400mm (16\") aperture\u003c\/strong\u003e and a fast \u003cstrong\u003ef\/4 focal ratio\u003c\/strong\u003e allows it to collect a massive amount of light in a short time. This significantly reduces exposure times needed for faint targets like galaxies and nebulae, maximizing the data you can capture in a single night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the real-world difference between the 1\/6 PV and 1\/10 PV optics on the VX16?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe standard \u003cstrong\u003e1\/6 PV wavefront\u003c\/strong\u003e optics are excellent and provide very sharp images. Upgrading to \u003cstrong\u003e1\/10 PV Ultra\u003c\/strong\u003e provides a measurably more perfect optical surface. This translates to the highest possible image contrast, allowing you to resolve finer details on planets, split closer double stars, and discern more subtle structures in bright deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the VX16's f\/4 system perform when imaging the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe VX16 is exceptionally well-suited for a target like the Orion Nebula (M42). Its \u003cstrong\u003e1600mm focal length\u003c\/strong\u003e provides a good image scale for the nebula's core, while the \u003cstrong\u003ef\/4 speed\u003c\/strong\u003e allows you to capture the faint outer loops of gas with relatively short sub-exposures, preserving detail in the bright Trapezium region without overexposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the cooling fan important for the VX16's 400mm mirror?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA large 400mm mirror has significant thermal mass and can take a long time to cool to the ambient night air temperature. The included \u003cstrong\u003ecooling fan\u003c\/strong\u003e actively draws air over the back of the mirror, speeding up this process. This minimizes internal tube currents—a major source of image distortion—and ensures you get sharp, stable views much faster.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the VX16 suitable for high-resolution planetary imaging of Jupiter with the 1\/10 PV upgrade?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. With the \u003cstrong\u003e1\/10 PV Ultra optics upgrade\u003c\/strong\u003e, the VX16 becomes a formidable planetary instrument. The near-perfect surface ensures maximum contrast, which is essential for resolving fine details like small ovals, festoons, and subtle color variations in Jupiter's cloud belts. Paired with a high-speed planetary camera and a Barlow lens, it can produce professional-level results.\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 29kg VX16 OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe VX16's \u003cstrong\u003e29kg tube weight\u003c\/strong\u003e, combined with the additional weight of a camera, finder, and guide scope, requires a very substantial equatorial mount. You should look for a mount with a payload capacity of at least 45-50kg (100 lbs) for imaging to ensure stability and precise tracking. Mounts in the Losmandy Titan, Celestron CGX-L, or Software Bisque Paramount class are appropriate.\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\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1600mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics Upgrades\u003c\/td\u003e\n\u003ctd\u003eOptional 1\/8 PV and 1\/10 PV Ultra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e82mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003e9-point CNC machined\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e29kg (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e434mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1580mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003eIntegrated fan\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\"\u003eVX16 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":"Professional (1\/6 PV)","offer_id":52942650179869,"sku":"OOUK-VX16","price":7182.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942650212637,"sku":"OOUK-VX16-1-8-PV-OPTICS","price":7503.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942650245405,"sku":"OOUK-VX16-1-10-PV-OPTICS","price":8124.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_0777e978-a4bd-4d76-bb00-eac8cc46fd0f.jpg?v=1789608596"},{"product_id":"orion-optics-uk-vx20","title":"Orion Optics UK VX20 DOB Optical Tube Assembly","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e500mm (20\") primary mirror for exceptional light-gathering\u003c\/li\u003e\n\u003cli\u003eFast f\/4 focal ratio, ideal for deep-sky imaging\u003c\/li\u003e\n\u003cli\u003eStandard 1\/6 PV wavefront optics, hand-figured in the UK\u003c\/li\u003e\n\u003cli\u003e9-point CNC-machined mirror cell with cooling fan\u003c\/li\u003e\n\u003cli\u003e2\" focuser with reduction gearing for precise focus control\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\u003eDownloads\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 VX20 DOB Optical Tube Assembly\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK VX20 DOB Optical Tube Assembly centers on a massive 500mm primary mirror with a fast f\/4 focal ratio, delivering immense light-gathering power for observing and imaging the faintest deep-sky objects. With a nominal focal length of 2000mm, this OTA features hand-figured optics certified to a minimum 1\/6 PV wavefront accuracy, ensuring high-contrast planetary and lunar views. The primary mirror is supported by a 9-point CNC-machined cell with an integrated cooling fan to maintain thermal stability and peak optical performance.\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\u003eA 500mm f\/4 Mirror with Certified 1\/6 PV Wavefront Accuracy\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the VX20 is the 500mm parabolic primary mirror, hand-finished in the UK to a guaranteed surface accuracy of 1\/6 Peak-to-Valley wavefront error or better. This level of precision, verified by a Zygo laser interferometer report supplied with every scope, goes far beyond the \"diffraction-limited\" standard. The result is visibly higher contrast, sharper stars, and the ability to resolve finer detail on planetary surfaces, limited only by atmospheric seeing.\u003c\/p\u003e\n\u003cp\u003eThe fast f\/4 focal ratio makes the VX20 an exceptional instrument for deep-sky imaging, capturing faint nebulae and distant galaxies with shorter exposure times. This optical speed, combined with the sheer aperture, provides incredibly bright, wide-field views that can frame entire star clusters and large emission nebulae in a single field with the right eyepiece.\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\u003eMechanical Design: 9-Point Cell and Truss Tube for Thermal Stability\u003c\/h3\u003e\n\u003cp\u003eA mirror of this size requires uncompromising support. The VX20 utilizes a CNC-machined, 9-point flotation mirror cell that distributes the mirror's weight evenly, preventing flexure and preserving the optical figure at any viewing angle. An integrated cooling fan accelerates thermal equilibrium, reducing tube currents and ensuring your telescope is ready for high-magnification use as quickly as possible.\u003c\/p\u003e\n\u003cp\u003eThe aluminium truss tube design provides a rigid and lightweight structure, critical for maintaining collimation as the telescope moves. With a total weight of 40kg and a length of 1945mm, the truss structure is essential for breaking the OTA down into more manageable components for transport and setup.\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\u003eImaging Interface: 2\" Reduction-Geared Focuser for Precise Control\u003c\/h3\u003e\n\u003cp\u003eAchieving critical focus at f\/4 is demanding, and the VX20 is equipped with a 2\" focuser featuring reduction gearing. This dual-speed mechanism allows for coarse adjustments to find the general focus point, followed by fine, precise movements to snap the image into perfect sharpness. This level of control is essential for both high-resolution planetary imaging and ensuring pinpoint stars in astrophotography.\u003c\/p\u003e\n\u003cp\u003eThe focuser accepts standard 2\" eyepieces and accessories, providing access to the widest possible true fields of view. For added flexibility, it is also fitted with a 1.25\" adapter, allowing you to use a full range of standard eyepieces and filters for planetary observation.\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\u003eChoosing Your Optical Grade: 1\/6 PV vs. the 1\/8 PV and 1\/10 PV Upgrades\u003c\/h3\u003e\n\u003cp\u003eWhile the standard 1\/6 PV optic delivers superb images, Orion Optics UK offers two upgrade paths for the most demanding observers. Each step represents a significant increase in the time and skill invested during the hand-figuring process, resulting in a mirror surface that more closely approaches perfection.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/6 PV (Professional Grade):\u003c\/strong\u003e The standard offering. Excellent for all-around observing, providing sharp, high-contrast images that outperform mass-produced optics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/8 PV (Research Grade):\u003c\/strong\u003e A meaningful step up for dedicated planetary and lunar observers. This higher precision minimizes light scatter, improving the visibility of low-contrast details like subtle banding on Saturn or intricate lunar rilles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/10 PV (Ultra Grade):\u003c\/strong\u003e The highest level of correction available. This grade is for those seeking the ultimate in optical performance, capable of delivering the sharpest, highest-fidelity images the 500mm aperture can theoretically produce under perfect seeing conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparing the Optical Grades\u003c\/h3\u003e\n\u003cp\u003eThe images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.\u003c\/p\u003e\n\u003cdiv class=\"DAV-comparison-grid\"\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_6-PV.jpg\" alt=\"Saturn viewed through 1\/6 PV Professional grade optics\"\u003e\n\u003cp\u003e1\/6 PV (Professional)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_8-PV.jpg\" alt=\"Saturn viewed through 1\/8 PV Research grade optics\"\u003e\n\u003cp\u003e1\/8 PV (Research)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-comparison-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Saturn-1_10-PV.jpg\" alt=\"Saturn viewed through 1\/10 PV Ultra grade optics\"\u003e\n\u003cp\u003e1\/10 PV (Ultra)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\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 is the real-world difference between the 1\/6 PV and 1\/10 PV optics on the VX20?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe difference is most apparent during high-magnification viewing of bright objects under steady skies. While the \u003cstrong\u003e1\/6 PV\u003c\/strong\u003e optic provides excellent, sharp views, the \u003cstrong\u003e1\/10 PV Ultra\u003c\/strong\u003e optic will show a higher level of contrast and resolve finer, lower-contrast details. On Jupiter, this could mean seeing more subtle swirls and festoons within the cloud belts; on the Moon, it translates to sharper crater wall terraces and rilles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Orion Optics UK VX20 perform on Jupiter with its f\/4 optics?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe VX20's 500mm aperture will resolve an incredible amount of detail on Jupiter. The fast f\/4 focal ratio is primarily for wide-field, deep-sky work, but when paired with a quality Barlow lens to increase the effective focal length, it becomes a formidable planetary instrument. The certified optical quality ensures that you can push the magnification to the limit of the atmosphere, revealing intricate details in the Great Red Spot and the main equatorial belts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 40kg weight of the VX20 OTA manageable for setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e40kg\u003c\/strong\u003e weight is for the fully assembled optical tube. The truss design allows the VX20 to be broken down into smaller, lighter components: the mirror box, the upper tube assembly, and the truss poles. While still a very large instrument, this disassembly makes it significantly more manageable to transport and set up than a solid-tube telescope of a similar size. It is typically a two-person job for safe and efficient assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow critical is the cooling fan for the VX20's 500mm mirror?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a \u003cstrong\u003e500mm\u003c\/strong\u003e mirror, active cooling is essential. The fan dramatically reduces the time it takes for the large mirror to reach ambient temperature. Without it, the mirror would continue to radiate heat for hours, creating disruptive air currents inside the optical tube (tube currents) that blur the image and prevent sharp, high-magnification views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of views can I expect of the Dumbbell Nebula (M27) with the VX20?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its 500mm aperture, the VX20 will provide stunning views of M27. The immense light-gathering ability will show the nebula's classic apple-core shape with remarkable brightness and clarity. With a UHC or O-III filter, you can expect to see intricate internal structures, faint outer extensions, and a clear distinction between the brighter central regions and the fainter lobes, all set against a dark sky background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the VX20's f\/4 focal ratio require special eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, fast f\/4 systems are demanding on eyepieces. To get sharp stars across the entire field of view, it is highly recommended to use premium eyepieces well-corrected for coma, a common aberration in fast Newtonians. Additionally, a coma corrector accessory is strongly advised, especially for imaging, to ensure pinpoint stars from edge to edge. The fast focal ratio also makes precise collimation absolutely critical for optimal performance.\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\u003eNewtonian Reflector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Diameter\u003c\/td\u003e\n\u003ctd\u003e500mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2000mm (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Optics Grade\u003c\/td\u003e\n\u003ctd\u003e1\/6 PV wavefront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Upgrades\u003c\/td\u003e\n\u003ctd\u003e1\/8 PV and 1\/10 PV Ultra available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd\u003e100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" focuser with reduction gearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cell\u003c\/td\u003e\n\u003ctd\u003e9-point CNC machined\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Cooling\u003c\/td\u003e\n\u003ctd\u003eIntegrated Fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Type\u003c\/td\u003e\n\u003ctd\u003eTruss\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e1945mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e40kg (nominal)\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\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":"Professional (1\/6 PV)","offer_id":52942651588893,"sku":"OOUK-VX20","price":11165.0,"currency_code":"CAD","in_stock":true},{"title":"Research (1\/8 PV)","offer_id":52942651621661,"sku":"OOUK-VX20-1-8-PV-OPTICS","price":11600.0,"currency_code":"CAD","in_stock":true},{"title":"Ultra (1\/10 PV)","offer_id":52942651654429,"sku":"OOUK-VX20-1-10PV-OPTICS","price":12336.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_6d378984-e56f-4039-bd8a-80fd764cfc1a.jpg?v=1789608606"}],"url":"https:\/\/davidastro.com\/collections\/orion-optics-uk-telescopes.oembed?page=2","provider":"David Astro","version":"1.0","type":"link"}