{"product_id":"starfield-newtonian-focuser-r-p-2","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-start=\"215\" data-end=\"237\"\u003e2\" rack-and-pinion\u003c\/strong\u003e upgrade is built to add \u003cstrong data-start=\"262\" data-end=\"307\"\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-start=\"560\" data-end=\"609\"\u003eGeared focusing designed for heavier payloads\u003c\/strong\u003e\u003cbr data-start=\"609\" data-end=\"612\"\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-start=\"919\" data-end=\"963\"\u003eDual-speed focusing (coarse + 10:1 fine)\u003c\/strong\u003e\u003cbr data-start=\"963\" data-end=\"966\"\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-start=\"1181\" data-end=\"1217\"\u003e50 mm of travel + drawtube scale\u003c\/strong\u003e\u003cbr data-start=\"1217\" data-end=\"1220\"\u003eYou get about \u003cstrong data-start=\"1234\" data-end=\"1249\"\u003e50 mm (~2\")\u003c\/strong\u003e of drawtube travel and a \u003cstrong data-start=\"1275\" data-end=\"1297\"\u003elaser-marked scale\u003c\/strong\u003e to help you return to known focus positions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-start=\"1382\" data-end=\"1423\"\u003eZWO EAF mounting made straightforward\u003c\/strong\u003e\u003cbr data-start=\"1423\" data-end=\"1426\"\u003eThis version is listed as \u003cstrong data-start=\"1452\" data-end=\"1485\"\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-section-id=\"1r2oexi\" data-start=\"2347\" data-end=\"2370\"\u003eIncluded \/ features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2\" focuser body with \u003cstrong data-start=\"2403\" data-end=\"2423\"\u003edual-speed knobs\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"font-size: 0.875rem;\" data-start=\"2466\" data-end=\"2489\"\u003e2\" compression ring\u003c\/strong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e eyepiece holder + \u003c\/span\u003e\u003cstrong style=\"font-size: 0.875rem;\" data-start=\"2508\" data-end=\"2531\"\u003e2\" to 1.25\" adapter\u003c\/strong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e (with filter threads on the adapter)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e\u003cstrong data-start=\"2611\" data-end=\"2630\"\u003e1.25\" dust plug\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eShips in a foam-fitted padded box; \u003cstrong data-start=\"2708\" data-end=\"2721\"\u003eno manual\u003c\/strong\u003e, and \u003cstrong data-start=\"2727\" data-end=\"2782\"\u003emounting screws for the base plate are not included\u003c\/strong\u003e\u003cstrong data-start=\"2727\" data-end=\"2782\"\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"3070\" data-start=\"3037\" data-section-id=\"8vyv96\"\u003eQuick specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMin height (no 1.25\" adapter): 79.0 mm (drawtube may extend ~32 mm below the curved plate at minimum height)\u003c\/li\u003e\n\u003cli\u003eMax height (no 1.25\" adapter): 129.0 mm\u003c\/li\u003e\n\u003cli\u003eTravel: 50 mm\u003c\/li\u003e\n\u003cli\u003eDrawtube OD: 59 mm (tube cutout must exceed this)\u003c\/li\u003e\n\u003cli\u003eWeight (with 1.25\" adapter): 860 g\u003c\/li\u003e\n\u003cli\u003eMax body OD: 82 mm\u003c\/li\u003e\n\u003cli\u003eBase plate curve diameter: 230mm (shims required if greater thank 230mm)\u003c\/li\u003e\n\u003cli\u003eBase plate dimensions: 90mm x 90mm\u003c\/li\u003e\n\u003cli\u003eHole Spacing optical axis: 70mm \u003c\/li\u003e\n\u003cli\u003eHole Spacing perpendicular to telescope tube: 73mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInside diameter of central hole: 78mm\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMounting hole specification: Unthreaded inside diameter of 4.9mm\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Starfield","offers":[{"title":"Default Title","offer_id":44554053812335,"sku":"SF-NWFOC2","price":394.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/IMG_4019.jpg?v=1771711799","url":"https:\/\/ontariotelescope.com\/products\/starfield-newtonian-focuser-r-p-2","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}