{"product_id":"celestron-oag-off-axis-guider-93648-copy","title":"Celestron OAG Off-Axis Guider - USED (93648-U)","description":"\u003ch1\u003eCelestron Off-Axis Guider - USED\u003c\/h1\u003e\n\u003cp\u003eThe Off-Axis Guider is an essential astroimaging accessory for long focal length telescopes that require the most accurate guiding possible. The Celestron Off-Axis Guider uses a prism to intercept a small portion of the telescope’s focal plane (outside the field of view of the main imaging camera) to locate a guide star. Any movement seen by the guide star will be the exact same movement seen by the imaging camera. Guiding this way will correct for tracking errors, as well as opto-mechanical errors or flexure. The result: better astroimages with pinpoint round stars.\u003cbr\u003e\u003cbr\u003eOff-Axis Guiders have been around for a long time, but typically pose three main challenges:\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFinding a guide star from the far edges of the telescope’s focal plane can be difficult, considering the small field of view and sometimes less-than-ideal illumination.\u003c\/li\u003e\n\u003cli\u003eGetting both imaging camera and autoguider to reach focus with one another is time consuming and sometimes requires experimentation.\u003c\/li\u003e\n\u003cli\u003eAdditional spacers and adapters are usually required for your particular camera, telescope, and autoguider, which adds to cost and complexity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCelestron's Off-Axis Guider addresses these challenges by:\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProviding a large 12.5 mm prism that can be adjusted to move closer to the center of the telescope’s focal plane, depending on the size of the imaging camera. This results in brighter guide stars, with the help of the large prism to fully illuminate the autoguider sensor.\u003c\/li\u003e\n\u003cli\u003eFeaturing a high-quality, fixed-orientation Helical focuser. This provides extremely smooth and accurate focus of the autoguider without changing (or twisting) the autoguider camera orientation.\u003c\/li\u003e\n\u003cli\u003eIncluding all the needed spacers and adapters are included for most common imaging configurations, including DSLR cameras, Nightscape CCD cameras, and more. The following adapters are included: SCT\/EdgeHD, female M48, female M42 (T-thread), male M48, male M42 (T-thread), 3 T-thread spacers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMost accurate way to guide – improved accuracy compared to using a separate guide scope\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e12.5mm multi-coated prism with optimized performance for maximum reflectivity and illumination to the autoguider\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFixed-orientation helical focuser for easy, smooth and accurate autoguider focus\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e48mm clear aperture supports full frame cameras without vignetting\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIncludes adapters with the correct spacing for DSLR cameras, Nightscape CCD and other popular astroimaging cameras\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIdeal for Schmidt- Cassegrain and EdgeHD telescopes\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"box-sizing: inherit; border-collapse: collapse; border-spacing: 0px; text-align: left; width: 1200px; color: #333e48; font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\" id=\"product-specs-list\" class=\"table-open\"\u003e\n\u003ctbody style=\"box-sizing: inherit;\" id=\"spec-block-1\"\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid #e4e8ea;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eWeight:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e18 oz (510 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 0px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eClear Aperture:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e48mm (1.89\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOff-Axis Guider\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eSCT\/EdgeHD Adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eM48 Female Adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eM48 Male Adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eM42 Female T-Thread Adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eM42 Male T-Thread Adapter\u003c\/li\u003e\n\u003cli\u003e3 T-Thread Spacers\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":49492467515621,"sku":"CEL-93648-U","price":370.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/celestron-oag-off-axis-guider-93648-astronomy-plus.webp?v=1690484668","url":"https:\/\/astronomyplus.com\/products\/celestron-oag-off-axis-guider-93648-copy","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}