{"product_id":"lunt-solar-1-25-dual-speed-focuser","title":"Lunt Solar 1.25\" Rack \u0026 Pinion Focuser with 10:1 Fine Focus","description":"\u003ch2\u003eLunt Solar 1.25\" Rack \u0026amp; Pinion Focuser with 10:1 Fine Focus\u003c\/h2\u003e\n\u003ch4\u003eIntroducing the New 1.25 Rack \u0026amp; Pinion Focuser with 10:1 Fine Focus from Lunt Solar\u003c\/h4\u003e\n\u003cp\u003ePrecision focusing at high magnifications demands more than standard rack and pinion\u003cbr\u003emechanisms can deliver. While our standard focuser addresses the fundamental limitations of helical systems, the 10:1 dual-speed variant takes focus control to an entirely new level of refinement.\u003cbr\u003eThe integrated 10:1 reduction gearing provides the micro-adjustment capability essential for critical focus applications like solar imaging, planetary observation, and high-power visual work where the difference between good focus and perfect focus determines image quality.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eDual-Speed Mechanism\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe focuser incorporates a precision planetary gear reduction system alongside the primary rack and pinion drive. The coarse focus knob provides rapid positioning across the full travel range, while the 10:1 fine focus knob enables micro-adjustments measured in thousandths of an inch.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eKey Specifications:\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv dir=\"ltr\" align=\"left\"\u003e\n\u003ctable\u003e\n\u003ccolgroup\u003e\n\u003ccol width=\"175\"\u003e\n\u003ccol width=\"267\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eParameter\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eValue\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFocuser Size\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e1.25\"\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDraw Tube Drive\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eRack and Pinion\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFine Focus Ratio\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e10:1 reduction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDraw Tube Travel\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e0.5\"\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eCoarse Focus Resolution\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eStandard rack engagement\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFine Focus Resolution\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e±0.0002\" per knob rotation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eRotatable\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eCompression Ring\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003ePositioning Accuracy\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e±0.001 inches (±0.025mm)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eLoad Capacity\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e6-8 pounds (2.7-3.6 kg)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eBacklash\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e\u0026lt;0.0005 inches when properly adjusted\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eMaterials\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eCNC machined Aluminum and Brass\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"summary__title\"\u003e\n\u003ch2 class=\"h4 accordion__title inline-richtext\"\u003eMechanical Construction\u003cslot pseudo=\"details-content\" id=\"details-content\"\u003e\u003cdiv class=\"accordion__content rte\" id=\"ProductAccordion-collapsible_tab_YRhcNM-template--18655438274673__main\"\u003e\u003cp\u003eThe Lunt Solar 1.25\" 10:1 focuser employs CNC-machined aluminum and brass components,\u003cbr\u003eproviding optimal thermal expansion characteristics and corrosion resistance for even the most\u003cbr\u003e\u003cbr\u003erigorous astronomical applications. The dual-speed mechanism utilizes hardened steel gearing within the reduction assembly to ensure consistent performance across thousands of focus cycles.\u003c\/p\u003e\u003c\/div\u003e\u003c\/slot\u003e\n\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"summary__title\"\u003e\n\u003cp class=\"h4 accordion__title inline-richtext\"\u003e\u003cspan\u003eThe Lunt Solar 1.25\" 10:1 focuser employs CNC-machined aluminum and brass components,\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eproviding optimal thermal expansion characteristics and corrosion resistance for even the most\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003erigorous astronomical applications. The dual-speed mechanism utilizes hardened steel gearing within the reduction assembly to ensure consistent performance across thousands of focus cycles.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eFocuser\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eLunt 5-Year Warranty\u003c\/p\u003e","brand":"Lunt","offers":[{"title":"Default Title","offer_id":48784557342949,"sku":"LS-001-148","price":377.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Lunt-dual-speed-focuser-astronomy-plus-1.png?v=1777045263","url":"https:\/\/astronomyplus.com\/products\/lunt-solar-1-25-dual-speed-focuser","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}