{"product_id":"stellalyra-10-f-8-m-lrc-ritchey-chretien-carbon-truss-telescope-ota","title":"StellaLyra 10\" f\/8 M-LRC Ritchey-Chrétien Carbon Truss Telescope OTA","description":"\u003cstyle\u003e\n.dcs-rc10t{max-width:1120px;margin:0 auto;color:#243445;font:inherit;line-height:1.7;text-align:left;overflow-wrap:anywhere}\n.dcs-rc10t *{box-sizing:border-box}.dcs-rc10t h2,.dcs-rc10t h3{color:#091725;line-height:1.25;letter-spacing:normal;text-align:left}\n.dcs-rc10t h2{font-size:clamp(25px,3vw,34px);margin:0 0 18px}.dcs-rc10t h3{font-size:23px;margin:0 0 16px}\n.dcs-rc10t p{margin:0 0 16px}.dcs-rc10t figure{margin:0;background:#fff;border:1px solid #e0e5e9;border-radius:12px;overflow:hidden}\n.dcs-rc10t img{display:block;width:100%;height:auto;max-width:600px;margin:auto;object-fit:contain}\n.dcs-rc10t .rc10t-feature,.dcs-rc10t .rc10t-intro{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:clamp(20px,4vw,40px);align-items:center;margin:0 0 38px}\n.dcs-rc10t .rc10t-intro{padding:24px;background:#091725;border-top:4px solid #c89524;border-radius:12px}\n.dcs-rc10t .rc10t-intro h2,.dcs-rc10t .rc10t-intro p{color:#fff!important}\n.dcs-rc10t .rc10t-label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:700}\n.dcs-rc10t .rc10t-panel{background:#f3f5f7;border-radius:12px;padding:24px;margin:0 0 32px}\n.dcs-rc10t ul{padding-left:22px;margin:0 0 16px}.dcs-rc10t li{margin-bottom:8px}\n.dcs-rc10t table{border-collapse:collapse;width:100%;table-layout:fixed;margin:16px 0 28px;font-size:15px}\n.dcs-rc10t th,.dcs-rc10t td{padding:10px 12px;border-bottom:1px solid #dce2e8;text-align:left;vertical-align:top;white-space:normal}\n.dcs-rc10t th{background:#f3f5f7;color:#091725}.dcs-rc10t th[scope=row]{width:42%}\n.dcs-rc10t details{border-bottom:1px solid #dce2e8;padding:16px 0}.dcs-rc10t summary{cursor:pointer;font-weight:700;color:#091725}.dcs-rc10t details p{margin:12px 0 0}\n.dcs-rc10t .rc10t-note{border-left:3px solid #c89524;padding:14px 18px;background:#fff8e8;margin:28px 0}\n.dcs-rc10t .rc10t-links{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}.dcs-rc10t .rc10t-links a{padding:12px 18px;border-radius:6px;background:#c89524;color:#091725!important;font-weight:700;text-decoration:none!important;min-height:44px}\n.dcs-rc10t .rc10t-links a:last-child{background:#f0f3f6}.dcs-rc10t a:focus-visible,.dcs-rc10t summary:focus-visible{outline:3px solid #2874aa;outline-offset:4px}\n@media(max-width:600px){.dcs-rc10t .rc10t-intro,.dcs-rc10t .rc10t-panel{padding:18px}.dcs-rc10t th,.dcs-rc10t td{padding:9px 7px;font-size:14px}}\n\u003c\/style\u003e\n\u003csection class=\"dcs-rc10t\"\u003e\n\u003cdiv class=\"rc10t-intro\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"rc10t-label\"\u003eStellaLyra · 10-inch f\/8 M-LRC Carbon-Truss RC\u003c\/p\u003e\n\u003ch2\u003eBuild a dedicated rig for closer deep-sky imaging.\u003c\/h2\u003e\n\u003cp\u003eThe StellaLyra 10-inch carbon-truss Ritchey–Chrétien brings a 250mm aperture and 2000mm focal length to an open-frame telescope with a fixed primary mirror. It is a substantial imaging platform for projects that benefit from tighter framing.\u003c\/p\u003e\n\u003cp\u003eChoose it as part of a complete system: a suitable mount, camera, guiding arrangement and carefully assembled imaging train are central to making the most of the optical tube.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cfigure\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/stellalyra-10-f8-mlrc-carbon-truss-rc-ota.jpg?v=1789723247\" alt=\"StellaLyra 10-inch f\/8 M-LRC carbon-truss Ritchey-Chretien optical tube\" width=\"800\" height=\"800\" loading=\"lazy\"\u003e\u003c\/figure\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rc10t-panel\"\u003e\n\u003ch3\u003eMake 2000mm a deliberate choice.\u003c\/h3\u003e\n\u003cp\u003eWith the same camera, a longer focal length covers a smaller area of sky. That can give smaller galaxies or compact nebulae more space in the frame, while larger subjects may need a mosaic.\u003c\/p\u003e\n\u003cp\u003eUse a field-of-view planner with your actual sensor and intended targets before selecting accessories. Consider camera pixel size and local seeing as well as framing. A tighter image scale also makes tracking and focus errors more apparent, so the quality of the complete setup matters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rc10t-feature\"\u003e\n\u003cfigure\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/stellalyra-10-f8-truss-rc-detail-3.jpg?v=1789817032\" alt=\"Side view of StellaLyra 10-inch carbon-truss RC showing open frame and mounting rails\" width=\"800\" height=\"800\" loading=\"lazy\"\u003e\u003c\/figure\u003e\u003cdiv\u003e\n\u003ch3\u003eAn open carbon-truss structure.\u003c\/h3\u003e\n\u003cp\u003eCarbon-fibre truss members connect the optical assemblies, with Losmandy-style rails on the top and underside. The open frame provides airflow around the telescope.\u003c\/p\u003e\n\u003cp\u003ePlan storage and transport for exposed optical and mechanical parts, keeping the supplied covers in place when appropriate. Consider nearby lights and your observing environment when deciding whether additional light control is needed. Tube construction does not remove the need to check focus and alignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rc10t-feature\"\u003e\n\u003cfigure\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/stellalyra-10-f8-truss-rc-detail-1.jpg?v=1789817007\" alt=\"StellaLyra 10-inch f\/8 carbon-truss RC showing rear focuser and cooling fans\" width=\"800\" height=\"800\" loading=\"lazy\"\u003e\u003c\/figure\u003e\u003cdiv\u003e\n\u003ch3\u003eCooling before the imaging run.\u003c\/h3\u003e\n\u003cp\u003eThree built-in fans assist thermal equalisation. Allow the telescope time to approach outdoor conditions before judging the final star images.\u003c\/p\u003e\n\u003cp\u003eMake cooling part of the setup routine, alongside balancing and cable checks. Begin with short test exposures, refine focus, and inspect the field before committing to a long sequence. Recheck when conditions change rather than relying on the first focus position all night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eSupport the whole working rig.\u003c\/h3\u003e\n\u003cp\u003ePublished tube weight is 16kg. Add the camera, corrector or reducer, filters, guiding equipment and cables before assessing mount suitability. Check counterweight requirements and saddle compatibility as part of the same decision.\u003c\/p\u003e\n\u003cp\u003eThe rear imaging train extends beyond the telescope itself and shifts its balance. Assemble the actual equipment before balancing, then check clearance near the mount, tripod or pier. Plan how to support and secure the tube during fitting and removal, especially if it will be transported regularly.\u003c\/p\u003e\n\u003cdiv class=\"rc10t-feature\"\u003e\n\u003cfigure\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/stellalyra-10-f8-truss-rc-detail-2.jpg?v=1789817020\" alt=\"Rear assembly and dual-speed focuser of StellaLyra 10-inch carbon-truss RC\" width=\"800\" height=\"800\" loading=\"lazy\"\u003e\u003c\/figure\u003e\u003cdiv\u003e\n\u003ch3\u003eRear focusing with the primary held fixed.\u003c\/h3\u003e\n\u003cp\u003eThe rotatable 3.25-inch dual-speed linear-bearing Crayford focuser provides coarse and fine manual control. Focusing moves the camera position while the primary remains fixed.\u003c\/p\u003e\n\u003cp\u003eFit the camera with its weight supported and check that every connection is secure through the intended pointing range. The focuser diameter alone does not establish a safe payload or full-frame optical coverage. If you intend to automate focus, confirm the motor, bracket and coupling requirements before buying.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rc10t-panel\"\u003e\n\u003ch3\u003eKeep mechanical extension and optical spacing separate.\u003c\/h3\u003e\n\u003cp\u003eTwo 25mm and one 50mm extension rings are supplied. Use the combination needed to bring your camera arrangement within the focusing range; installing every ring is not a universal starting point.\u003c\/p\u003e\n\u003cp\u003eAn added reducer or flattener has its own specified distance to the sensor. Include the camera’s sensor recess, adapters and filter equipment in that measurement. Then check that the complete system reaches focus, with useful adjustment remaining. Record the finished arrangement for repeatable reassembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eChoose correction optics for an RC.\u003c\/h3\u003e\n\u003cp\u003eThe Ritchey–Chrétien design corrects coma, but that does not guarantee a flat, sharp field across every sensor. Assess any reducer or flattener for this optical design, your camera and the required connections.\u003c\/p\u003e\n\u003cp\u003eA Newtonian coma corrector should not be transferred to an RC simply because it fits mechanically. Send us the exact camera and accessory models if you would like the proposed combination checked before ordering adapters.\u003c\/p\u003e\n\u003ch3\u003eEstablish alignment before chasing exposure time.\u003c\/h3\u003e\n\u003cp\u003eCheck collimation with a method appropriate to an RC and confirm the result on a star field. Inspect both the centre and corners before starting a long imaging sequence.\u003c\/p\u003e\n\u003cp\u003eIf the stars are uneven, separate focus, tracking, tilt, spacing and alignment checks. Change one factor at a time and keep notes. Avoid disturbing an already well-aligned system without evidence of a problem.\u003c\/p\u003e\n\u003ch3\u003eIncluded and purchased separately\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSupplied\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eChoose separately\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon-truss RC optical assembly and focuser\u003c\/td\u003e\n\u003ctd\u003eTracking mount and tripod or pier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop and bottom Losmandy-style rails\u003c\/td\u003e\n\u003ctd\u003eCamera, filters and camera adapters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThree cooling fans\u003c\/td\u003e\n\u003ctd\u003eSuitable power and control equipment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTwo 25mm and one 50mm extension rings\u003c\/td\u003e\n\u003ctd\u003eAny RC-compatible reducer or flattener\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2-inch holder and 1.25-inch adapter\u003c\/td\u003e\n\u003ctd\u003eEyepieces and diagonal for visual use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinder base and primary\/secondary dust covers\u003c\/td\u003e\n\u003ctd\u003eFinder and guiding equipment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDesign \/ aperture\u003c\/th\u003e\n\u003ctd\u003eRitchey–Chrétien \/ 250mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eFocal length \/ ratio\u003c\/th\u003e\n\u003ctd\u003e2000mm \/ f\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eStructure\u003c\/th\u003e\n\u003ctd\u003eOpen carbon-fibre truss\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eFocuser\u003c\/th\u003e\n\u003ctd\u003e3.25-inch dual-speed rotatable linear-bearing Crayford\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePublished length \/ outside diameter\u003c\/th\u003e\n\u003ctd\u003e617mm \/ 375mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePublished tube weight\u003c\/th\u003e\n\u003ctd\u003e16kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eBefore ordering\u003c\/h3\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this a complete imaging package?\u003c\/summary\u003e\u003cp\u003eNo. It is an optical tube assembly. The mount, camera, guiding and any correction optics need to be chosen separately. Budget for the complete setup rather than the telescope alone.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the truss design make it maintenance-free?\u003c\/summary\u003e\u003cp\u003eNo. Cooling, focus, collimation and secure camera connections still need attention. Establish a repeatable setup routine, especially after transporting the telescope.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eShould I choose this or the 8-inch RC?\u003c\/summary\u003e\u003cp\u003eCompare framing with your camera, total mounting load, handling and the complete-system budget. A larger tube is a useful step when the rest of the equipment and your intended projects support it.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"rc10t-note\"\u003e\n\u003cstrong\u003eSupplier-stock availability\u003c\/strong\u003e\u003cp\u003eAvailability reflects supplier stock and can change. Contact Dark Clear Skies to confirm dispatch timing if you need the telescope for a particular date.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rc10t-links\"\u003e\n\u003ca href=\"\/pages\/stellalyra\"\u003eCompare the StellaLyra range\u003c\/a\u003e\u003ca href=\"mailto:contact@darkclearskies.co.uk?subject=StellaLyra%2010-inch%20truss%20RC\"\u003eDiscuss your imaging system\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"StellaLyra","offers":[{"title":"Default Title","offer_id":55665192698232,"sku":null,"price":2995.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/stellalyra-10-f8-mlrc-carbon-truss-rc-ota.jpg?v=1789723247","url":"https:\/\/www.darkclearskies.co.uk\/products\/stellalyra-10-f-8-m-lrc-ritchey-chretien-carbon-truss-telescope-ota","provider":"Dark Clear Skies ","version":"1.0","type":"link"}