{"product_id":"astronomy-plus-2-dual-speed-rack-bearing-focuser-for-newtonians","title":"Astronomy Plus 2\" Precision Dual-Speed Rack \u0026 Bearing Focuser for Newtonians","description":"\u003ch1\u003eAstronomy Plus 2\" Dual-Speed Rack \u0026amp; Bearing Focuser Newtonians\u003c\/h1\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003ePrecision focusing is the foundation of a great observing experience, and this 2-inch dual-speed focuser was engineered from the ground up to deliver exactly that. Developed after years of dedicated research, it combines a patented bearing-and-rack system that sets it apart from conventional focusers.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eA unique approach to stability\u003c\/strong\u003e Eight evenly distributed bearings share the load in every direction, eliminating play and flex while supporting heavy eyepieces and camera setups with ease. Unlike traditional designs where the focuser tube bears the mechanical load, the rack here handles transmission only — meaning force applied during focusing never introduces drift or shifts your optical axis. The result is exceptional light-path stability, surpassing that of premium focusers in its class.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eSmooth, confident control\u003c\/strong\u003e The dual-speed fine adjustment mechanism delivers a silky, feather-light feel at the fingertips. Whether you're doing a rough focus pass or dialing in critical sharpness for high-magnification planetary work or astrophotography, each movement is precise and predictable. The fine-adjustment gear is also compatible with synchronous belt drives for motorized setups.\u003c\/p\u003e\n\u003cp class=\"product-title\"\u003e\u003cstrong data-end=\"854\" data-start=\"833\"\u003ePayload Capacity:\u003c\/strong\u003e Supports heavy accessories such as cameras, filter wheels, coma correctors, and imaging trains up to approximately \u003cstrong data-end=\"980\" data-start=\"970\"\u003e5.2 kg\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch4 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eSpecifications at a glance\u003c\/h4\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBarrel size: 2 inches\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eClear height: 40 mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAvailable focusing stroke: 35 mm or 60 mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBody weight: approx. 600 g\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBearing preload: fully adjustable for zero-clearance fit\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDual-speed fine adjustment \u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003ePayload: 5.2 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWhether you're a visual observer demanding a rock-solid platform or an imager chasing razor-sharp stars, this focuser offers the build quality and tactile refinement to match your ambitions.\u003c\/p\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eChoosing the right adapter\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe focuser is compatible with all Sky-Watcher Quattro Imaging Newtonian Telescopes.\u003cbr\u003eHowever, the Sky-Watcher Quattro Imaging Newtonian Telescopes come with two different adapters, as shown in the image below:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/69f048df6314b0a790b57de10ed6b6ce.jpg?v=1778705419\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThis is a round adapter with protruding parts. This adapter is compatible with Sky-Watcher Dobsonian Telescope.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/214d3d8944e950d8a36e6dde41ddd508.jpg?v=1778705434\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eThis is a round adapter, and it belongs to a different model. This adapter is compatible with Sky-Watcher Quattro 150P\/200P\/250P\/300P Newtonian Telescope\u003c\/p\u003e\n\u003cp\u003eThe choice depends on the user's telescope configuration.\u003cbr\u003e\u003cstrong\u003ePlease see the image below:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/4453e725a8eb5fc10d73b4c038b79d8d_1024x1024.jpg?v=1778705665\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch2 data-end=\"53\" data-start=\"0\" data-section-id=\"18jmm50\"\u003eChoosing Between the 35mm and 60mm Travel Versions\u003c\/h2\u003e\n\u003cp data-end=\"206\" data-start=\"55\"\u003eThis focuser is available in both a compact 35mm travel version and a longer 60mm travel version to better match different observing and imaging needs.\u003c\/p\u003e\n\u003ch4 data-end=\"231\" data-start=\"208\" data-section-id=\"1u2ocsi\"\u003e\u003cstrong\u003e35mm Travel Version\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp data-end=\"572\" data-start=\"232\"\u003eThe 35mm version is ideal for astrophotography setups where rigidity, compactness, and reduced flexure are important.\u003cbr data-end=\"352\" data-start=\"349\"\u003eIts shorter travel helps keep the imaging train more stable while reducing overall weight and profile. This version is generally recommended for users with a well-optimized imaging setup and known backfocus requirements.\u003c\/p\u003e\n\u003cp data-end=\"590\" data-start=\"574\"\u003eRecommended for:\u003c\/p\u003e\n\u003cul data-end=\"699\" data-start=\"591\"\u003e\n\u003cli data-end=\"609\" data-start=\"591\" data-section-id=\"r0qu6i\"\u003eAstrophotography\u003c\/li\u003e\n\u003cli data-end=\"634\" data-start=\"610\" data-section-id=\"147sgih\"\u003eCompact imaging setups\u003c\/li\u003e\n\u003cli data-end=\"667\" data-start=\"635\" data-section-id=\"xbc8nv\"\u003eUsers wanting maximum rigidity\u003c\/li\u003e\n\u003cli data-end=\"699\" data-start=\"668\" data-section-id=\"1qavo06\"\u003ePermanent or optimized setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-end=\"724\" data-start=\"701\" data-section-id=\"16xdggy\"\u003e\u003cstrong\u003e60mm Travel Version\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp data-end=\"970\" data-start=\"725\"\u003eThe 60mm version offers additional focus travel, making it more versatile for visual observing and mixed-use setups.\u003cbr data-end=\"844\" data-start=\"841\"\u003eIt is especially useful when using multiple accessories, diagonals, reducers, or eyepieces requiring larger focus adjustments.\u003c\/p\u003e\n\u003cp data-end=\"988\" data-start=\"972\"\u003eRecommended for:\u003c\/p\u003e\n\u003cul data-end=\"1121\" data-start=\"989\"\u003e\n\u003cli data-end=\"1007\" data-start=\"989\" data-section-id=\"1nwlspv\"\u003eVisual observing\u003c\/li\u003e\n\u003cli data-end=\"1038\" data-start=\"1008\" data-section-id=\"12tu4qz\"\u003eMixed visual and imaging use\u003c\/li\u003e\n\u003cli data-end=\"1072\" data-start=\"1039\" data-section-id=\"9zwvni\"\u003eUsers with multiple accessories\u003c\/li\u003e\n\u003cli data-end=\"1121\" data-start=\"1073\" data-section-id=\"1p9a2wm\"\u003eSituations requiring greater focus flexibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"1314\" data-start=\"1123\"\u003eIf you are unsure which version to choose, the 60mm version is typically the safest and most versatile option, while experienced astrophotographers often prefer the more compact 35mm version.\u003c\/p\u003e\n\u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eCompatibility\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp data-end=\"243\" data-start=\"18\"\u003eThis 2\" dual-speed R\u0026amp;P focuser is designed primarily for Sky-Watcher Newtonian telescopes using the standard Synta-style round focuser base. It is especially well suited for imaging Newtonians requiring a low-profile focuser.\u003c\/p\u003e\n\u003ch3 data-end=\"277\" data-start=\"245\" data-section-id=\"9ot4q4\"\u003eCommon Compatible Telescopes\u003c\/h3\u003e\n\u003ch4 data-end=\"310\" data-start=\"279\"\u003eSky-Watcher Quattro Series\u003c\/h4\u003e\n\u003cul data-end=\"370\" data-start=\"311\"\u003e\n\u003cli data-end=\"325\" data-start=\"311\" data-section-id=\"2cddis\"\u003eQuattro 150P\u003c\/li\u003e\n\u003cli data-end=\"340\" data-start=\"326\" data-section-id=\"2cfiz6\"\u003eQuattro 200P\u003c\/li\u003e\n\u003cli data-end=\"355\" data-start=\"341\" data-section-id=\"2cfot3\"\u003eQuattro 250P\u003c\/li\u003e\n\u003cli data-end=\"370\" data-start=\"356\" data-section-id=\"2cesxf\"\u003eQuattro 300P\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMost Sky-Watcher Dobsonian telescopes\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4 data-end=\"521\" data-start=\"484\"\u003eOther Possible Compatible Models\u003c\/h4\u003e\n\u003cul data-end=\"674\" data-start=\"522\"\u003e\n\u003cli data-end=\"585\" data-start=\"562\" data-section-id=\"1m9wz2t\"\u003eSome Orion Newtonians\u003c\/li\u003e\n\u003cli data-end=\"674\" data-start=\"586\" data-section-id=\"12gesya\"\u003eSome GSO \/ Kepler \/ rebranded Newtonians (may require modifications or adapter plates)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-end=\"709\" data-start=\"676\" data-section-id=\"1p1rqlp\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eImportant Compatibility Notes\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp data-end=\"736\" data-start=\"711\"\u003eCompatibility depends on:\u003c\/p\u003e\n\u003cul data-end=\"848\" data-start=\"737\"\u003e\n\u003cli data-end=\"753\" data-start=\"737\" data-section-id=\"1mnuiln\"\u003eTube curvature\u003c\/li\u003e\n\u003cli data-end=\"777\" data-start=\"754\" data-section-id=\"4c0jvl\"\u003eFocuser base diameter\u003c\/li\u003e\n\u003cli data-end=\"810\" data-start=\"778\" data-section-id=\"bd6jww\"\u003eExisting mounting hole pattern\u003c\/li\u003e\n\u003cli data-end=\"848\" data-start=\"811\" data-section-id=\"svrfrh\"\u003eRequired focuser height \/ backfocus\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"941\" data-start=\"850\"\u003eSome older Sky-Watcher models may require modifications or adapter plates for installation.\u003c\/p\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"1081\" data-start=\"943\"\u003e\u003cem\u003e\u003cstrong\u003eIf you are unsure about compatibility, feel free to contact us with your telescope model ,photos of your current focuser and dimensions for assistance.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eTechnical Specifications \u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px; table-layout: fixed;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eBarrel diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003e2 inches (50.8 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: var(--color-background-secondary);\"\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eClear height\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003e40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eFocusing stroke\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003e35 mm or 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: var(--color-background-secondary);\"\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eBody weight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003e≈ 600 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eDrive system\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eRack \u0026amp; Pignon \/ bearing (pattented)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: var(--color-background-secondary);\"\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eNumber of bearings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003e8 (evenly distributed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eBearing preload\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eFully adjustable \/ zero clearance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: var(--color-background-secondary);\"\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eSpeed adjustment\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eDual-speed (coarse + fine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eMotorisation compatibility\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eYes, ZWO and EAF synchronous belt drive ready\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: var(--color-background-secondary);\"\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eRack type\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary); border-bottom: 0.5px solid var(--color-border-tertiary);\"\u003eToothed \/ transmission only (load-independent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary);\"\u003eIntended use\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary);\"\u003eVisual observation \u0026amp; astrophotography\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px 14px; color: var(--color-text-secondary);\"\u003eCompatibility (with adapter)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: 500; color: var(--color-text-primary);\"\u003eStand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e \u003c\/p\u003e\n\u003ch4 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eDiagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/O1CN01Q1GtvX1M2huhPGNVc__49501377_cfd95847-3fe4-4f93-9bb6-bac3f2da7ae9_1024x1024.webp?v=1778703229\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e \u003c\/p\u003e\n\u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e2\" Dual-Speed Rack \u0026amp; Bearing Focuser, selected travel length : 35mm or 60 mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eNewtonian Adapter \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/pages\/astronomy-plus-products-warranty\" rel=\"noopener\" target=\"_blank\"\u003eAstronomy Plus limited Warranty\u003c\/a\u003e\u003c\/p\u003e","brand":"Astronomy Plus","offers":[{"title":"35mm \/ Round only adapter","offer_id":49020954312933,"sku":"AP-F2-35T-RD+F2-NR-1","price":418.0,"currency_code":"CAD","in_stock":true},{"title":"35mm \/ Round adapter with protruding parts.","offer_id":49020954345701,"sku":"AP-F2-35T-RD+F2-NR-2","price":418.0,"currency_code":"CAD","in_stock":true},{"title":"60mm \/ Round only adapter","offer_id":49020954378469,"sku":"AP-F2-60T-RD+F2-NR-1","price":432.0,"currency_code":"CAD","in_stock":true},{"title":"60mm \/ Round adapter with protruding parts.","offer_id":49020954411237,"sku":"AP-F2-60T-RD+F2-NR-2","price":432.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/20260513_154528_1.jpg?v=1778706565","url":"https:\/\/astronomyplus.com\/products\/astronomy-plus-2-dual-speed-rack-bearing-focuser-for-newtonians","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}