{"product_id":"william-optics-zenithstar-66mm-sd-apo-refractor-with-0-8x-field-flattener-reducer-pre-owned","title":"William Optics ZenithStar 66mm SD APO Refractor with 0.8x Field Flattener\/Reducer – Pre-Owned","description":"\u003ch1 data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003eWilliam Optics ZenithStar 66mm SD APO Refractor with 0.8x Field Flattener\/Reducer – Pre-Owned\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eWilliam Optics ZenithStar 66mm SD\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a compact, high-quality apochromatic refractor designed for wide-field astrophotography and visual observing. Featuring a 66mm fully multi-coated SD doublet objective and a fast f\/5.9 focal ratio, this telescope delivers sharp, high-contrast views in a lightweight and portable package.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis pre-owned telescope includes a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eWilliam Optics 0.8x Field Flattener\/Reducer\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, making it an excellent choice for wide-field deep-sky astrophotography. The reducer brings the effective focal length down from 388mm to approximately 310mm (f\/4.7), allowing for wider fields of view and shorter exposures. The field-flattening optics help improve star shapes toward the edges of the imaging field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe ZenithStar 66 SD features a smooth \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003edual-speed 1:10 Crayford focuser\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e with a 360-degree rotatable design for precise focusing and convenient camera positioning. Its retractable dew shield and compact optical tube make it an excellent portable imaging telescope or travel refractor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAperture:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 66mm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFocal Length:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 388mm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFocal Ratio:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e f\/5.9\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOptical Design:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Air-spaced SD doublet APO refractor\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOptical Coatings:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Fully multi-coated\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFocuser:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1.6\" dual-speed Crayford with 1:10 fine adjustment\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFocuser Rotation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 360°\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDew Shield:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Retractable\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOptical Tube Weight:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 3.5 lbs\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWith 0.8x Reducer:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 310mm focal length, f\/4.7\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIncluded Accessories\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eWilliam Optics ZenithStar 66mm SD optical tube\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWilliam Optics 0.8x Field Flattener\/Reducer\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCondition\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePre-owned telescope, excellent condition. Please refer to product photos for cosmetic condition and included accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAn excellent compact refractor for imaging large nebulae, star fields, and other wide-field deep-sky targets. The included reducer makes this a versatile and affordable astrophotography setup.\u003c\/span\u003e\u003c\/p\u003e","brand":"oc telescope","offers":[{"title":"Default Title","offer_id":67836724936958,"sku":null,"price":349.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2129\/9429\/files\/IMG_4378.jpg?v=1792795916","url":"https:\/\/octelescope.com\/products\/william-optics-zenithstar-66mm-sd-apo-refractor-with-0-8x-field-flattener-reducer-pre-owned","provider":"oc telescope","version":"1.0","type":"link"}