{"title":"Baader Off-Axis Guiders \u0026 Guide Scopes","description":"\u003cp\u003eBaader Planetarium guiding accessories support accurate autoguiding for long exposures. Two off-axis guiders are offered: one designed for the RCC coma corrector and one for the Baader FlipMirror II, picking off guide stars inside the main optical path.\u003c\/p\u003e\u003cp\u003eFor guide scopes and other tubes, Baader guidescope rings come in sizes from BP I (60-120mm) and BP II (110-160mm) up to Size III (140-185mm) and Size IV (175-265mm).\u003c\/p\u003e","products":[{"product_id":"baader-off-axis-guider-for-baader-flipmirror-ii","title":"Baader Off Axis Guider for Baader FlipMirror II","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned exclusively for the Baader FlipMirror II (BFM II)\u003c\/li\u003e\n\u003cli\u003eAttaches directly to the 19 mm bottom port\u003c\/li\u003e\n\u003cli\u003eTunable prism allows for precise guide star centering\u003c\/li\u003e\n\u003cli\u003e17.5 mm prism offset maximizes illumination without vignetting\u003c\/li\u003e\n\u003cli\u003eEnables autoguiding regardless of the flip mirror's position\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\u003eBaader Off Axis Guider for Baader FlipMirror II\u003c\/h2\u003e\n\u003cp\u003eThe Baader Off Axis Guider for Baader FlipMirror II (BFM-OAG) integrates directly with the BFM II's 19 mm bottom port, using a tunable prism to pick off guide stars independent of the mirror's position. Removing the included 4mm spacer ring sets the prism at a 17.5mm offset from the optical axis, maximizing the illuminated field for your autoguider without causing vignetting on the main sensor.\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\u003eSeamless Integration via the 19mm BFM II Port\u003c\/h3\u003e\n\u003cp\u003eThis Off-Axis-Guider is engineered specifically for the Baader FlipMirror II, attaching securely to its 19 mm bottom port. The pick-up prism is positioned permanently below the main mirror, ensuring it is always in the light path. This allows for continuous autoguiding whether you are visually observing with an eyepiece in the top port (mirror down) or imaging with a camera on the rear port (mirror 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\u003eTunable Prism and 17.5mm Offset for Maximum Illumination\u003c\/h3\u003e\n\u003cp\u003eThe BFM-OAG features a unique, movable prism that can be adjusted to actively center a guide star on your autoguider's chip—a critical function for precise tracking. With the 4mm spacer ring removed, the prism sits 17.5mm from the optical axis, a distance calculated to provide the largest possible vignetting-free field for the guide camera. If the prism protrudes too far into the light path for your specific setup, the 4mm spacer can be re-inserted, although this will slightly reduce the usable illuminated area of the prism.\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\u003eAchieving Parfocality with 18.5mm DT-4 Extensions\u003c\/h3\u003e\n\u003cp\u003eMaking your guide camera and main camera parfocal is straightforward. For cameras with short backfocus, the resulting image plane is approximately 24mm behind the BFM II's T-2 threads. For systems requiring more distance, such as a DSLR, the Baader DT-4 nosepiece extension (#1905130) adds 18.5mm of length to your 1.25\" autoguider. Using one or two DT-4 extensions provides the flexibility to bring virtually any guide camera into the same focal plane as your primary imaging camera.\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\"\u003eHow does the Baader BFM-OAG attach to the FlipMirror II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader BFM-OAG is designed to connect directly to the \u003cstrong\u003e19 mm nosepiece port\u003c\/strong\u003e located on the bottom of the Baader FlipMirror II diagonal. This provides a secure, dedicated connection point that keeps the guider perfectly aligned with the optical train.\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 4mm spacer ring on the Baader BFM-OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e4mm spacer ring\u003c\/strong\u003e adjusts how far the pick-up prism intrudes into the light path. Removing it sets the prism at the optimal 17.5mm offset for maximum guide field illumination. However, if this causes any obstruction in your specific optical setup, you can re-install the ring to pull the prism back slightly, at the cost of a marginally smaller illuminated area for guiding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader BFM-OAG without a FlipMirror II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this unit is specifically designed to mate with the FlipMirror II's bottom port. To use this OAG with a standard telescope setup, you would need the complete \u003cstrong\u003eBaader Off Axis Guider for RCC (RCC-OAG) #2956950\u003c\/strong\u003e, which includes this prism assembly along with the necessary T-2 adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy guide camera is not parfocal with my main camera using the Baader BFM-OAG. How do I fix this?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need to adjust the distance of the guide camera from the OAG body. The easiest way to do this is with spacing rings or dedicated extenders. Baader recommends using one or two \u003cstrong\u003eDT-4 nosepiece extensions (#1905130)\u003c\/strong\u003e, which thread into the 1.25\" filter threads of your guide camera to push it further out until it reaches the same focal plane as your main imager.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm imaging Jupiter with a planetary camera on my FlipMirror II's top port. Can I still guide with the Baader BFM-OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The BFM-OAG prism is located in the body of the FlipMirror II, below the mirror itself. This means it picks off guide stars from the incoming light path \u003cstrong\u003ebefore\u003c\/strong\u003e the light hits the flip mirror. As a result, the OAG functions perfectly whether the mirror is down (sending light to the top port) or up (sending light to the rear port).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen using the Baader BFM-OAG with my SCT and a DSLR, where should the prism be positioned?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor the best results with a rectangular sensor like that in a DSLR, the FlipMirror II body should be oriented so the OAG prism sits \u003cstrong\u003eunder the long side of the camera sensor\u003c\/strong\u003e. This placement allows the prism to find guide stars in the largest available off-axis field of view without risk of intruding into the corners of your main image 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\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eBaader FlipMirror II (BFM II)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection to BFM II\u003c\/td\u003e\n\u003ctd\u003e19 mm Nosepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrism Offset from Optical Axis\u003c\/td\u003e\n\u003ctd\u003e17.5 mm (with 4mm spacer removed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemovable Spacer Ring\u003c\/td\u003e\n\u003ctd\u003e4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.07\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eGuider\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003e43mm + 3.5mm Extension tube (requires 24mm Back focus on BFM II)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrisms Width\u003c\/td\u003e\n\u003ctd\u003e9.5 mm\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\"\u003eOff Axis Guider for Baader FlipMirror II\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\"\u003e4mm Spacer Ring\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\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967300727069,"sku":"BAA-2956951","price":178.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-Off-Axis-Guider-for-Baader-FlipMirror-II-1__74182.1597110541.1280.1280.jpg?v=1684340034"},{"product_id":"baader-guide-scope-rings-bp-i-60-120mm","title":"Baader Guide Scope Rings BP I - 60-120mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAccommodates Tube Diameters: 60mm to 120mm\u003c\/li\u003e\n\u003cli\u003eRing Width: 28mm\u003c\/li\u003e\n\u003cli\u003eAdjustment Screws: Three M10 with Non-Rotating Ball-Bearing Tips\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid Turned Aluminum\u003c\/li\u003e\n\u003cli\u003eAccessory Ports: Four ¼\" Threaded Mounting Points\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\u003eBaader Guide Scope Rings BP I - 60-120mm\u003c\/h2\u003e\n\u003cp\u003eThe Baader Guide Scope Rings BP I provide a rigid, non-slip mounting solution for guide scopes with tube diameters from 60mm to 120mm. Each 28mm wide ring is machined from solid aluminum and features three oversized M10 adjustment screws with 10mm diameter, non-rotating, ball-bearing tips for precise, scratch-free alignment. Mounting is handled by a central ¼\" photo thread and two 5mm through-holes, while four additional ¼\" threaded surfaces allow for secure attachment of 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\u003eRock-Solid Support for Guide Scopes from 60mm to 120mm\u003c\/h3\u003e\n\u003cp\u003eMachined from solid, turned aluminum, these 28mm wide rings provide a massive, stable platform that eliminates flexure in your guiding setup. The wide contact surface and robust build are designed to securely hold guide scopes ranging from compact 60mm models to larger 120mm refractors, ensuring your autoguiding remains precise throughout a long imaging 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\u003eM10 Adjustment Screws: Precision Pointing Without Tube Damage\u003c\/h3\u003e\n\u003cp\u003eThe core of the BP I design is its advanced adjustment system. Three large M10 screws on each ring allow for fine, deliberate alignment of the guide scope. Crucially, each 10mm diameter screw tip features an internal ball-bearing surface made of V2A steel, which prevents the hard rubber contact pad from rotating as you tighten it. This eliminates the torsional stress and paint marring common with simpler nylon-tipped screws, keeping your guide scope held firmly without risk of scratches or slippage.\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\u003eIntegrated Accessory Mounting: 4 Additional 1\/4\" Threaded Ports\u003c\/h3\u003e\n\u003cp\u003eBeyond their primary function, the BP I rings serve as a versatile mounting hub. Each ring features four milled planar surfaces on its outer diameter, each equipped with a standard ¼\" photo-threaded hole. This allows you to piggyback additional accessories directly onto the rings, such as a finderscope, a WiFi adapter, or cable management hardware, creating a clean and integrated imaging train.\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\u003eBaader BP I vs. Standard Rings: The Advantage of Non-Rotating Tips\u003c\/h3\u003e\n\u003cp\u003eWhile many guide rings use a simple bolt with a fixed nylon tip, the Baader BP I rings incorporate a superior mechanical design. The difference is most apparent during final adjustments.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Rings:\u003c\/strong\u003e As you tighten a standard screw, the tip twists against the telescope tube. This can cause the guide scope to \"walk\" out of position, mar the paint finish over time, and apply uneven, slipping pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaader BP I Rings:\u003c\/strong\u003e The ball-bearing mechanism isolates the rotational force. Only pure linear pressure is applied to the guide scope, resulting in an absolutely solid, non-slip grip that holds alignment perfectly and protects your equipment's finish.\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 Baader BP I rings better than cheaper guide scope rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage of the Baader BP I rings is the \u003cstrong\u003enon-rotating, ball-bearing tips\u003c\/strong\u003e on the M10 adjustment screws. This design prevents the guide scope from shifting or being scratched during tightening, a common issue with simpler rings that use basic nylon-tipped screws. The solid aluminum construction and 28mm width also provide superior rigidity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I mount the Baader BP I rings on any dovetail bar?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The base of each ring has a central \u003cstrong\u003e¼\" photo-threaded hole\u003c\/strong\u003e and two additional \u003cstrong\u003e5mm through-holes\u003c\/strong\u003e. This combination allows you to securely bolt them to virtually any dovetail plate or mounting bar that accepts standard ¼\"-20 or M5 hardware.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the adjustment screws on the Baader BP I rings scratch my guide scope's finish?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The screw tips are covered with a hard rubber sheath and, more importantly, they do not rotate when tightened. This \u003cstrong\u003enon-rotating design\u003c\/strong\u003e ensures that the tip presses straight onto the tube without any twisting or scraping motion, protecting your telescope's paint and finish.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the maximum diameter scope I can use with the Baader BP I rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader BP I rings are designed for tube diameters ranging from \u003cstrong\u003e60mm up to 120mm\u003c\/strong\u003e. The long M10 adjustment screws provide ample travel to accommodate any telescope within this range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow can I use the four extra threaded holes on the Baader BP I rings for a finder scope like the SkySurfer III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe four milled surfaces with ¼\" threads are ideal for piggybacking accessories. To mount a Baader SkySurfer III or similar finder, you would attach the finder's mounting shoe or stalk to one of the threaded holes using a standard ¼\"-20 bolt. This creates a solid, integrated pointing system directly on your guide scope assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the Baader BP I rings suitable for holding a small, wide-field refractor like a 70mm f\/5 for piggyback imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While designed for guiding, the massive, 28mm wide construction of the Baader BP I rings makes them exceptionally rigid and perfectly capable of holding a small imaging refractor. A 70mm scope fits comfortably within the 60-120mm range, and the rings' stability will prevent flexure during imaging.\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\u003eSupported Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e60mm - 120mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Width\u003c\/td\u003e\n\u003ctd\u003e28mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Material\u003c\/td\u003e\n\u003ctd\u003eSolid Turned Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustment Screws\u003c\/td\u003e\n\u003ctd\u003e3x M10 per ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Design\u003c\/td\u003e\n\u003ctd\u003eBall-bearing with hard rubber sheath (non-rotating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Diameter\u003c\/td\u003e\n\u003ctd\u003e10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Material\u003c\/td\u003e\n\u003ctd\u003eV2A Steel (ball bearing surface)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase Mounting\u003c\/td\u003e\n\u003ctd\u003e1x ¼\" photo thread, 2x 5mm through-holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Mounting\u003c\/td\u003e\n\u003ctd\u003e4x ¼\" photo threads on milled surfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e2 rings per set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.76\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecial Features\u003c\/td\u003e\n\u003ctd\u003eball bearing tips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Type\u003c\/td\u003e\n\u003ctd\u003e6x large handknobs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Brands\u003c\/td\u003e\n\u003ctd\u003eAll Telescopes in given Tube sizes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameters\u003c\/td\u003e\n\u003ctd\u003e60 – 120 mm\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\"\u003eBaader Guide Scope Rings BP I (Set of 2)\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\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967373177117,"sku":"BAA-1500201","price":209.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Guide-Scope-Rings-BP-I-60-120mm-1__80408.1597111060.1280.1280.jpg?v=1684341585"},{"product_id":"baader-guide-scope-rings-bp-ii-110-160mm","title":"Baader Guide Scope Rings BP II - 110-160mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAccommodates Tube Diameters from 110mm to 160mm\u003c\/li\u003e\n\u003cli\u003eMassive 28mm Ring Width for High Rigidity\u003c\/li\u003e\n\u003cli\u003eThree M10 Adjustment Screws Per Ring\u003c\/li\u003e\n\u003cli\u003e10mm Non-Rotating, Ball-Bearing Steel Tips\u003c\/li\u003e\n\u003cli\u003eBase Mounting via ¼\" Thread or 5mm Holes\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\u003eBaader Guide Scope Rings BP II - 110-160mm\u003c\/h2\u003e\n\u003cp\u003eThis pair of Baader Guide Scope Rings BP II securely holds optical tubes from 110mm to 160mm in diameter, utilizing a massive 28mm wide turned aluminum construction for absolute rigidity against flexure. Each ring features three M10 adjustment screws with large knobs, terminating in 10mm diameter, non-rotating, ball-bearing tips made from V2A steel to prevent slipping or scratching your guide scope. Mounting is handled by a central ¼\" photo thread and two 5mm through-holes, while four additional photo-threaded holes on the outer diameter allow for flexible accessory attachment.\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\u003eSecure Mounting for Tubes from 110mm to 160mm\u003c\/h3\u003e\n\u003cp\u003eEngineered from solid, turned aluminum, these Baader rings provide a mechanically stable platform for guide scopes and secondary instruments with tube diameters between 110mm and 160mm. The substantial 28mm width of each ring creates a broad contact area, distributing the load and minimizing mechanical flexure—a critical factor for maintaining precise guiding accuracy over 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\u003eNon-Rotating 10mm Ball-Bearing Tips: Precision Without Scratches\u003c\/h3\u003e\n\u003cp\u003eThe standout feature of the BP II rings is the design of the three M10 adjustment screws. Each screw is tipped with a 10mm V2A steel surface that makes contact with the guide scope. Thanks to an internal ball-bearing mechanism, this tip does not rotate as you tighten the screw, eliminating the risk of twisting the guide scope out of alignment or marring its finish. A hard rubber sheath provides a non-slip grip that holds your instrument securely without causing damage.\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\u003eVersatile Mounting: ¼\" Threads and 5mm Through-Holes\u003c\/h3\u003e\n\u003cp\u003eBaader ensures broad compatibility by incorporating multiple mounting options. The base of each ring has a central ¼\" photo-threaded hole for direct attachment to dovetail bars and saddles, flanked by two 5mm through-holes for custom bolt-on solutions. Additionally, four milled planar surfaces on the outer diameter of each ring feature their own photo-threaded holes, allowing you to piggyback accessories like a finder scope or control box directly onto the ring 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\u003eBaader BP II Rings vs. Standard Guide Rings: A Mechanical Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile standard guide rings with simple nylon-tipped screws may be sufficient for smaller guide scopes, they introduce potential sources of error. The Baader BP II rings are an engineering solution to common guiding problems.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotational Shift:\u003c\/strong\u003e Standard screws can twist the guide scope as they are tightened, slightly altering alignment. The BP II's non-rotating, ball-bearing tips prevent this entirely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Flexure:\u003c\/strong\u003e The massive 28mm width and solid aluminum build of the BP II rings provide superior rigidity compared to narrower, less substantial rings, which can flex under the weight of a heavier instrument.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Grip:\u003c\/strong\u003e The V2A steel and rubber tips offer a more positive, non-slip grip than simple nylon screws, ensuring your guide scope does not shift during a long imaging 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\"\u003eHow do the Baader BP II Guide Scope Rings prevent scratching my telescope tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader BP II rings use a unique adjustment screw design. The \u003cstrong\u003e10mm V2A steel tips\u003c\/strong\u003e are covered with a hard rubber sheath, providing a firm but non-marring contact surface. Critically, the tips are mounted on a \u003cstrong\u003eball-bearing system\u003c\/strong\u003e, so they do not rotate as you tighten them, preventing any grinding or twisting motion against the telescope's finish.\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 non-rotating tips on the Baader BP II adjustment screws?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is precision. When a standard screw tip rotates against a tube, it can cause the tube to shift or twist slightly, throwing off your guide star alignment. The non-rotating design of the Baader BP II rings ensures that the only motion is linear, pressing the scope securely into place without altering its pointing direction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the mounting options on the base of the Baader Guide Scope Rings BP II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eEach ring offers two primary mounting methods on its base: a central \u003cstrong\u003e¼\" standard photo thread\u003c\/strong\u003e for easy attachment to most astronomical dovetail bars, and \u003cstrong\u003etwo 5mm diameter through-holes\u003c\/strong\u003e for a more permanent, custom-bolted connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I mount other accessories onto the Baader BP II rings themselves?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Each ring has \u003cstrong\u003efour milled planar surfaces\u003c\/strong\u003e on its outer circumference, and each surface is equipped with a standard photo-threaded hole. This allows you to attach additional accessories like finder scopes, laser pointers, or small control units directly to the rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI plan to use a 6\" f\/4 Newtonian (approx. 150mm tube diameter) as a wide-field astrograph piggybacked on my main telescope. Are the Baader BP II rings rigid enough for this?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The 110-160mm range of the Baader BP II rings is perfect for a 150mm tube. Their massive \u003cstrong\u003e28mm width\u003c\/strong\u003e and solid aluminum construction are specifically designed to prevent flexure, making them an ideal choice for securely mounting a relatively heavy instrument like a 6\" Newtonian for imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the Baader BP II Guide Scope Rings to a standard Vixen or Losmandy dovetail bar?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe easiest method is to use the central ¼\" threaded hole on the bottom of each ring. You will need two ¼\"-20 screws of appropriate length to thread up from the bottom of your dovetail bar into the base of the rings. This provides a secure and standard connection.\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\u003eCompatible Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e110mm - 160mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Width\u003c\/td\u003e\n\u003ctd\u003e28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Material\u003c\/td\u003e\n\u003ctd\u003eTurned Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustment Screws\u003c\/td\u003e\n\u003ctd\u003e3x M10 per ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Diameter\u003c\/td\u003e\n\u003ctd\u003e10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Design\u003c\/td\u003e\n\u003ctd\u003eBall-bearing, non-rotating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Material\u003c\/td\u003e\n\u003ctd\u003eV2A Steel with rubber sheath\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase Mounting\u003c\/td\u003e\n\u003ctd\u003e1x ¼\" photo thread, 2x 5mm through-holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Mounting\u003c\/td\u003e\n\u003ctd\u003e4x ¼\" photo threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e2 rings per set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e1.03\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecial Features\u003c\/td\u003e\n\u003ctd\u003eball bearing tips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Type\u003c\/td\u003e\n\u003ctd\u003e6x large handknobs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Brands\u003c\/td\u003e\n\u003ctd\u003eAll Telescopes in given Tube sizes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameters\u003c\/td\u003e\n\u003ctd\u003e110 – 160 mm\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\"\u003eBaader Guide Scope Rings BP II (110-160mm)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\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\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967373209885,"sku":"BAA-1500202","price":271.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Guide-Scope-Rings-BP-II-110-160mm-1__75978.1597111062.1280.1280.jpg?v=1684341595"},{"product_id":"baader-off-axis-guider-for-rcc-coma-corrector","title":"Baader Off-Axis Guider for RCC Coma Corrector","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTunable pick-off prism for guide star centering\u003c\/li\u003e\n\u003cli\u003eDesigned for the Baader RCC Newtonian Coma Corrector\u003c\/li\u003e\n\u003cli\u003eAccepts standard 1 1\/4\" guide cameras and eyepieces\u003c\/li\u003e\n\u003cli\u003eEliminates differential flexure from separate guidescopes\u003c\/li\u003e\n\u003cli\u003eMaintains a rigid, co-axial optical train\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\u003eBaader Off-Axis Guider for RCC Coma Corrector\u003c\/h2\u003e\n\u003cp\u003eThe Baader Off-Axis Guider for the RCC Coma Corrector is the only OAG designed for this system with a fully tunable pick-off prism, allowing you to precisely center a guide star on your sensor using a standard 1 1\/4\" eyepiece holder without ever rotating your camera.\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 Guiding: The Tunable Pick-Off Prism\u003c\/h3\u003e\n\u003cp\u003eThe core challenge of any off-axis guider is finding a suitable guide star in the corrected field. This Baader OAG solves the problem with an adjustable pick-off prism. Instead of being forced to rotate your entire imaging assembly to hunt for a star, you can tune the prism's position independently, actively centering a guide star on your autoguider's chip. This capability dramatically speeds up your setup time and ensures you can guide on the best possible star in the field.\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 Exclusively for the Baader RCC Coma Corrector\u003c\/h3\u003e\n\u003cp\u003eThis off-axis guider is not a universal-fit accessory; it is engineered specifically to integrate with the Baader Rowe Coma Corrector (RCC). This ensures correct spacing, a rigid connection, and optimal placement of the pick-off prism within the RCC's corrected light cone. The result is a solid, flexure-free guiding solution that becomes a seamless part of your Newtonian imaging train, preserving the optical corrections of the RCC for both your main camera and your guider.\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\u003eBaader RCC OAG vs. Fixed-Prism Designs: The Advantage of Adjustment\u003c\/h3\u003e\n\u003cp\u003eMany off-axis guiders use a fixed-stalk or helical-only focusing mechanism, which limits your guide star selection to a narrow annulus at the edge of the field. The Baader RCC OAG provides a distinct advantage.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed-Prism OAGs:\u003c\/strong\u003e These often force a compromise. If no bright star falls exactly where the prism sits, you must rotate the entire camera and OAG, ruining your framing. You are often left with a faint, suboptimal guide star.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaader's Tunable Prism:\u003c\/strong\u003e This design lets you decouple framing from guide star selection. Once your main camera is framed on the target, you can move the prism to find and center the brightest, most stable guide star available. This leads to tighter guiding, sharper main images, and less time wasted in the 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 makes the Baader RCC Off-Axis Guider's prism unique?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts key feature is the \u003cstrong\u003etunable pick-off prism\u003c\/strong\u003e. Unlike fixed-prism OAGs, this design allows you to adjust the prism's position to actively find and center a suitable guide star on your autoguider's sensor without rotating your primary camera, which saves significant setup time and improves guiding accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat size guide camera does the Baader RCC OAG accept?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader RCC Off-Axis Guider is equipped with a standard \u003cstrong\u003e1 1\/4\" eyepiece holder\u003c\/strong\u003e. This allows it to accept any autoguider or guiding eyepiece with a 1.25\" nosepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Baader RCC OAG compatible with other coma correctors?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this Off-Axis Guider is specifically designed for a seamless mechanical and optical fit with the \u003cstrong\u003eBaader Planetarium RCC (Rowe Coma Corrector)\u003c\/strong\u003e for Newtonian telescopes. Its spacing and threading are optimized for that specific corrector and it is not intended for universal use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy use the Baader RCC OAG instead of a separate guidescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn off-axis guider uses the same light path as your main imaging camera, which completely eliminates the problem of \u003cstrong\u003edifferential flexure\u003c\/strong\u003e. This is where the main telescope and a separate guidescope physically shift slightly relative to each other, causing guiding errors and elongated stars. The RCC OAG ensures your guiding is based on the exact same motion your main sensor sees.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Baader RCC OAG a good choice for an 8\" f\/4 Newtonian astrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice. An 8\" f\/4 astrograph is precisely the type of instrument the Baader RCC Coma Corrector is designed for. Pairing it with this dedicated OAG creates a rigid, high-performance imaging train that corrects for coma while providing the most accurate guiding possible by eliminating guidescope flexure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Baader RCC OAG help when imaging a target like the galaxy cluster Abell 2151 where guide stars are sparse?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn star-poor regions like the field around the Hercules Cluster (Abell 2151), a fixed-prism OAG might not find any usable guide star at all. The \u003cstrong\u003etunable prism\u003c\/strong\u003e of the Baader RCC OAG allows you to scan a much wider area for a potential guide star after you've framed your target. This significantly increases your chances of finding a star bright enough for reliable guiding, a task that would be nearly impossible with a fixed-prism design.\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\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.17\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size (in)\u003c\/td\u003e\n\u003ctd\u003e1¼\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eGuider\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003e36.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePivoting Range\u003c\/td\u003e\n\u003ctd\u003e140°\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\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967374192925,"sku":"BAA-2956950","price":244.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Off-Axis-Guider-for-RCC-Coma-Corrector-1__73343.1597111085.1280.1280.jpg?v=1684341652"},{"product_id":"baader-planetarium-guidescope-rings-1-pair-size-iii-140-185mm","title":"Baader Planetarium Guidescope Rings (1 pair) – Size III, 140-185mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for Tube Diameters from 140-185mm\u003c\/li\u003e\n\u003cli\u003eSolid, Turned Aluminum Construction\u003c\/li\u003e\n\u003cli\u003eNon-Rotating, Non-Marring V2A Steel Tips\u003c\/li\u003e\n\u003cli\u003eBall-Bearing Adjustment Mechanism\u003c\/li\u003e\n\u003cli\u003eMultiple Accessory Mounting Points\u003c\/li\u003e\n\u003cli\u003eLarge, Easy-to-Grip Adjustment Knobs\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\u003eGuidescope Rings (1 pair) – Size III, 140-185mm\u003c\/h2\u003e\n\u003cp\u003eEngineered for absolute stability, the Baader Planetarium Size III Guidescope Rings provide a robust, non-damaging mounting platform for guide telescopes with tube diameters from 140mm to 185mm. Machined from solid, turned aluminum with a 28mm width, these rings feature large adjustment knobs and unique ball-bearing tips that prevent slipping and protect your telescope's finish. The design ensures your guiding setup remains rigid and perfectly aligned throughout your imaging 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\u003eBall-Bearing Tips: Secure Guiding Without Scratches\u003c\/h3\u003e\n\u003cp\u003eThe critical point of contact in any guidescope ring is the adjustment screw tip. These Baader rings utilize three M10 adjustment screws per ring, each equipped with a 10mm diameter, non-rotating tip. This tip features a V2A stainless steel ball-bearing surface covered by a hard rubber sheath, ensuring the pressure surface does not twist against your telescope's tube during adjustment.\u003c\/p\u003e\n\u003cp\u003eThis innovative design provides two key benefits. First, it creates a solid, non-slip grip that prevents any shift in the guidescope's alignment. Second, it completely eliminates the risk of scratching, denting, or marring the finish of your optical tube, preserving the condition of your equipment.\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\u003eSolid Aluminum Body with Integrated ¼\" Accessory Mounts\u003c\/h3\u003e\n\u003cp\u003eThe main body of each ring is machined from a single piece of solid aluminum for maximum rigidity and vibration suppression. The base includes a central ¼\" photo-threaded connection and two additional 5mm through-holes, offering versatile and secure options for bolting the rings to any dovetail bar.\u003c\/p\u003e\n\u003cp\u003eFor added functionality, four milled planar surfaces are integrated into the outer diameter of each ring. Each of these surfaces is tapped with a standard ¼\" photo thread, allowing you to piggyback additional accessories like a finderscope, laser pointer, or a small wide-field camera directly onto your guide scope 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\"\u003eHow do the Baader Size III Guidescope Rings prevent scratching my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe rings feature three M10 adjustment screws with \u003cstrong\u003enon-rotating tips\u003c\/strong\u003e. Each tip has a ball-bearing surface made of V2A steel and is covered by a hard rubber sheath. Because the tip doesn't spin as you tighten it, it provides a firm grip without marring or scratching your telescope's tube.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the mounting points on the outside of the Baader Size III rings for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe exterior of each ring has four milled flat surfaces with standard \u003cstrong\u003e¼\" photo-threaded holes\u003c\/strong\u003e. These allow you to \"piggyback\" additional accessories, such as a finderscope, a small camera, or other aiming devices, directly onto the guidescope assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre these Baader guidescope rings stable enough for long-exposure guiding?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. They are machined from \u003cstrong\u003esolid, turned aluminum\u003c\/strong\u003e to be massive and rigid. This construction, combined with the 28mm wide profile and secure, non-slip adjustment screws, minimizes flexure and ensures your guide scope remains perfectly aligned throughout a long imaging session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I mount these Baader rings on a standard Vixen or Losmandy dovetail bar?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the base of each ring is designed for versatile mounting. It includes a central standard \u003cstrong\u003e¼\" photo-threaded connection\u003c\/strong\u003e and two additional 5mm through-holes, providing multiple options for securely bolting the rings to most common dovetail plates and bars.\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 large knobs on the Baader Size III rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe large, knurled adjustment knobs are designed for easy use, even when \u003cstrong\u003ewearing gloves in cold weather\u003c\/strong\u003e. They provide excellent leverage, allowing you to make fine, controlled adjustments to the guidescope's alignment without requiring tools.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I'm using a heavy guidescope like a small refractor, will the Baader Size III rings hold it securely without flexure?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The rings are engineered from solid aluminum for maximum rigidity. Their \"massive\" design is specifically intended to support heavier guide telescopes without introducing sag or flexure, which is critical for maintaining precise tracking during 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\u003eTube Diameter Range\u003c\/td\u003e\n\u003ctd\u003e140mm - 185mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Width\u003c\/td\u003e\n\u003ctd\u003e28mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction Material\u003c\/td\u003e\n\u003ctd\u003eSolid, turned aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustment Screws\u003c\/td\u003e\n\u003ctd\u003e3x M10 per ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Diameter\u003c\/td\u003e\n\u003ctd\u003e10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Material\u003c\/td\u003e\n\u003ctd\u003eV2A steel ball-bearing with hard rubber sheath\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase Mounting\u003c\/td\u003e\n\u003ctd\u003e1x ¼\" photo thread, 2x 5mm through-holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Mounting\u003c\/td\u003e\n\u003ctd\u003e4x ¼\" photo threads per ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e1.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecial Features\u003c\/td\u003e\n\u003ctd\u003eball bearing tips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Type\u003c\/td\u003e\n\u003ctd\u003e6x large handknobs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Brands\u003c\/td\u003e\n\u003ctd\u003eAll Telescopes in given Tube sizes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameters\u003c\/td\u003e\n\u003ctd\u003e140 – 185 mm\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\"\u003eSize III Guidescope Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\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\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":52913211408669,"sku":"BAA-1500203","price":392.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-Guidescope-Rings-1-pair-Size-III-140-185mm-1_edaedc7d-768a-42d8-9bcd-d9a577686686.jpg?v=1789088232"},{"product_id":"baader-planetarium-guidescope-rings-1-pair-size-iv-140-185mm","title":"Baader Planetarium Guidescope Rings (1 pair) – Size IV, 175-265mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eSize IV Guidescope Rings (Pair)\u003c\/li\u003e\n\u003cli\u003eNon-Rotating, Non-Marring Adjustment Screws\u003c\/li\u003e\n\u003cli\u003eBall-Bearing V2A Steel Screw Tips\u003c\/li\u003e\n\u003cli\u003eIntegrated Accessory Mounting Points\u003c\/li\u003e\n\u003cli\u003eStandard Photo-Threaded Base Connection\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\u003eGuidescope Rings (1 pair) – Size IV, 175-265mm\u003c\/h2\u003e\n\u003cp\u003eSecure your guidescope without compromise using the Guidescope Rings (1 pair) – Size IV. The unique adjustment screws feature non-rotating tips, creating a solid, non-slip grip that prevents any scratches on your telescope tube. With multiple mounting points for accessories, these rings establish a rigid, flex-free foundation for precise autoguiding.\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\u003eNon-Rotating, Non-Marring Adjustment Screws\u003c\/h3\u003e\n\u003cp\u003eThe critical feature of these guidescope rings is the intelligent design of the adjustment screws. Each of the large, easy-to-grip knobs operates a screw with a ball-bearing tip made from V2A steel. This tip, covered by a hard rubber sheath, does not rotate as you apply pressure, ensuring your guidescope is held securely without any risk of slipping or scratching the tube's finish.\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\u003eVersatile Mounting for Scopes and Accessories\u003c\/h3\u003e\n\u003cp\u003eThese rings are designed for flexible integration into your imaging setup. The base includes a standard photo-threaded connection and additional through-holes for a secure attachment to your dovetail plate. Furthermore, the rings feature several milled planar surfaces on their outer diameter, each with a photo-threaded hole, allowing you to attach finders, control boxes, or other accessories directly to the ring 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 makes the adjustment screws on these Size IV rings special?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe screws feature non-rotating, ball-bearing tips made of \u003cstrong\u003eV2A steel\u003c\/strong\u003e and covered with a hard rubber sheath. This design prevents the screw tip from twisting as it's tightened, which provides a very firm grip without scratching or marring the finish on your guidescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I mount accessories to the Size IV Guidescope Rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe rings have several milled flat surfaces on their outer circumference. These surfaces are equipped with \u003cstrong\u003estandard photo-threaded holes\u003c\/strong\u003e, making it easy to attach additional equipment like a small finder, a dew controller, or other accessories directly to the rings.\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 non-rotating screw tips for guiding?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eStable guiding requires the guidescope to be held absolutely rigid. Because the screw tips don't rotate, they eliminate the small shifts and slips that can occur as you tighten traditional screws. This results in a more solid connection and helps prevent flexure in your guiding system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre these rings suitable for holding a small refractor like a William Optics RedCat for wide-field imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, while designed for guidescopes, the solid, non-marring grip of these rings makes them an excellent choice for securely mounting a premium, small-aperture imaging scope. The non-rotating screws will protect the telescope's finish while providing the rigidity needed for long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use these rings to mount a guidescope on a Celestron C8 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the base of the rings features a standard photo-threaded connection and through-holes, allowing them to be mounted to a dovetail bar, which can then be attached to the top of a Celestron C8 or similar SCT. The robust design ensures a stable platform for autoguiding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat material are the screw tips made of?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ball-bearing contact surface of the adjustment screws is made from \u003cstrong\u003eV2A steel\u003c\/strong\u003e for durability and smooth operation, and it's covered with a hard rubber sheath to provide a secure, non-slip grip on the telescope tube.\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\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e3.21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecial Features\u003c\/td\u003e\n\u003ctd\u003eball bearing tips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube diameter (min)\u003c\/td\u003e\n\u003ctd\u003e175 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube diameter (max)\u003c\/td\u003e\n\u003ctd\u003e265 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Type\u003c\/td\u003e\n\u003ctd\u003e6x large handknobs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameters\u003c\/td\u003e\n\u003ctd\u003e175 - 265 mm\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\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":52913212064029,"sku":"BAA-1500204","price":947.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-Guidescope-Rings-1-pair-Size-IV-140-185mm-1_22d6272b-b4d2-4af9-8db5-bdc1d5083d56.jpg?v=1789088243"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/baader-off-axis-guiders-and-guide-scopes.oembed","provider":"David Astro","version":"1.0","type":"link"}