{"product_id":"starfield-optics-2-newtonian-focuser-r-p","title":"Starfield Optics 2\" Newtonian focuser R\u0026P","description":"\u003cp\u003eWhen your Newtonian’s stock focuser starts to feel like the weak link—especially with a heavier camera train—this Starfield Optics \u003cstrong data-end=\"237\" data-start=\"215\"\u003e2\" rack-and-pinion\u003c\/strong\u003e upgrade is built to add \u003cstrong data-end=\"307\" data-start=\"262\"\u003erigidity, repeatability, and fine control\u003c\/strong\u003e. The R\u0026amp;P drive gives a more positive, “geared” feel than many friction-based designs, and the dual-speed controls make it easy to land on tight focus without hunting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"609\" data-start=\"560\"\u003eGeared focusing designed for heavier payloads\u003c\/strong\u003e\u003cbr data-end=\"612\" data-start=\"609\"\u003eRack-and-pinion focusers are often chosen when you’re hanging more weight off the back of a Newtonian and want a focusing system that stays consistent through the night. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"963\" data-start=\"919\"\u003eDual-speed focusing (coarse + 10:1 fine)\u003c\/strong\u003e\u003cbr data-end=\"966\" data-start=\"963\"\u003eDial in focus quickly with the main knob, then “creep” into perfect focus using the microfocus control. A drawtube lock is included for holding position once you’ve set focus.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"1217\" data-start=\"1181\"\u003e50 mm of travel + drawtube scale\u003c\/strong\u003e\u003cbr data-end=\"1220\" data-start=\"1217\"\u003eYou get about \u003cstrong data-end=\"1249\" data-start=\"1234\"\u003e50 mm (~2\")\u003c\/strong\u003e of drawtube travel and a \u003cstrong data-end=\"1297\" data-start=\"1275\"\u003elaser-marked scale\u003c\/strong\u003e to help you return to known focus positions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-end=\"1423\" data-start=\"1382\"\u003eZWO EAF mounting made straightforward\u003c\/strong\u003e\u003cbr data-end=\"1426\" data-start=\"1423\"\u003eThis version is listed as \u003cstrong data-end=\"1485\" data-start=\"1452\"\u003eEAF compatible out of the box\u003c\/strong\u003e, using the standard EAF bracket, and includes a coupler (noting it’s 5 mm and may need adjustment depending on EAF generation).\u003c\/p\u003e\n\u003ch3 data-end=\"2370\" data-start=\"2347\" data-section-id=\"1r2oexi\"\u003eIncluded \/ features\u003c\/h3\u003e\n\u003cul data-end=\"2824\" data-start=\"2372\"\u003e\n\u003cli data-end=\"2463\" data-start=\"2372\" data-section-id=\"wix6nb\"\u003e\n\u003cp data-end=\"2463\" data-start=\"2374\"\u003e2\" focuser body with \u003cstrong data-end=\"2423\" data-start=\"2403\"\u003edual-speed knobs\u003c\/strong\u003e \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2608\" data-start=\"2464\" data-section-id=\"3brc1q\"\u003e\n\u003cp data-end=\"2608\" data-start=\"2466\"\u003e\u003cstrong data-end=\"2489\" data-start=\"2466\"\u003e2\" compression ring\u003c\/strong\u003e eyepiece holder + \u003cstrong data-end=\"2531\" data-start=\"2508\"\u003e2\" to 1.25\" adapter\u003c\/strong\u003e (with filter threads on the adapter) \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2670\" data-start=\"2609\" data-section-id=\"1k8y49j\"\u003e\n\u003cp data-end=\"2670\" data-start=\"2611\"\u003e\u003cstrong data-end=\"2630\" data-start=\"2611\"\u003e1.25\" dust plug\u003c\/strong\u003e \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2824\" data-start=\"2671\" data-section-id=\"1eg4gmg\"\u003e\n\u003cp data-end=\"2824\" data-start=\"2673\"\u003eShips in a foam-fitted padded box; \u003cstrong data-end=\"2721\" data-start=\"2708\"\u003eno manual\u003c\/strong\u003e, and \u003cstrong data-end=\"2782\" data-start=\"2727\"\u003emounting screws for the base plate are not included\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"8vyv96\" data-start=\"3037\" data-end=\"3070\"\u003eQuick specs\u003c\/h2\u003e\n\u003cul data-start=\"3072\" data-end=\"3626\"\u003e\n\u003cli data-section-id=\"1sbf0th\" data-start=\"3072\" data-end=\"3228\"\u003e\n\u003cp data-start=\"3074\" data-end=\"3228\"\u003e\u003cstrong data-start=\"3074\" data-end=\"3108\"\u003eMin height (no 1.25\" adapter):\u003c\/strong\u003e 79.0 mm (drawtube may extend ~32 mm below the curved plate at minimum height) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"stxril\" data-start=\"3229\" data-end=\"3316\"\u003e\n\u003cp data-start=\"3231\" data-end=\"3316\"\u003e\u003cstrong data-start=\"3231\" data-end=\"3265\"\u003eMax height (no 1.25\" adapter):\u003c\/strong\u003e 129.0 mm \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"x75f5e\" data-start=\"3317\" data-end=\"3378\"\u003e\n\u003cp data-start=\"3319\" data-end=\"3378\"\u003e\u003cstrong data-start=\"3319\" data-end=\"3330\"\u003eTravel:\u003c\/strong\u003e 50 mm \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ufxwme\" data-start=\"3379\" data-end=\"3476\"\u003e\n\u003cp data-start=\"3381\" data-end=\"3476\"\u003e\u003cstrong data-start=\"3381\" data-end=\"3397\"\u003eDrawtube OD:\u003c\/strong\u003e 59 mm (tube cutout must exceed this) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1effmns\" data-start=\"3477\" data-end=\"3559\"\u003e\n\u003cp data-start=\"3479\" data-end=\"3559\"\u003e\u003cstrong data-start=\"3479\" data-end=\"3511\"\u003eWeight (with 1.25\" adapter):\u003c\/strong\u003e 860 g \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"g73ulm\" data-start=\"3560\" data-end=\"3626\"\u003e\n\u003cp data-start=\"3562\" data-end=\"3626\"\u003e\u003cstrong data-start=\"3562\" data-end=\"3578\"\u003eMax body OD:\u003c\/strong\u003e 82 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cspan data-canva-clipboard=\"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\"\u003e\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e2” Newtonian focuser is a direct bolt-on replacement for stock rack-and-pinion focusers on 8\" and 10\" GSO Dobsonian telescopes sold under various brand names. Direct bolt-on compatibility also applies to\u003c\/span\u003e\u003cspan\u003e Celestron Star Hopper\u003c\/span\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cspan\u003eMeade Light Bridge\u003c\/span\u003e\u003cspan\u003e telescopes. EAF motor focuser compatible.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eBase Plate Dimensions and Mounting Data\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCurve diameter: 9.06\" (230mm) Base plate dimensions: 3.54\" x 3.54\" (90mm x 90mm)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHole spacing parallel to telescope tube \/ optical axis, center-to-center: 70mm (2.76\")\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHole spacing perpendicular to telescope tube, center-to-center, straight-line measurement: 73mm (2.87\")\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHole spacing perpendicular to telescope tube, center-to-center, measured along base plate curve: 74mm (2.91\")\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCentral opening inside diameter: 3.07\" (77.9mm)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":42536758313031,"sku":"SF-F-NT2","price":399.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0648\/1631\/6487\/files\/SF-F-NT2_a59cca47-138a-4bfe-91fe-62b557941f4e.jpg?v=1772747778","url":"https:\/\/starfieldoptics.com\/products\/starfield-optics-2-newtonian-focuser-r-p","provider":"Starfield Optics","version":"1.0","type":"link"}