Celestron Off-Axis Guider

Celestron Off-Axis Guider. The Celestron Off-Axis Lens Guider is an essential astroimaging accessory for long focal length telescopes that require the most accurate guiding possible. It 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. Providing a large 12.5mm 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. Featuring 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. Including 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 with the Celestron Telescope Accessory: SCT/EdgeHD female M48 female M42 (T-thread) male M48 male M42 (T-thread) 3 T-thread spacers. Specifications for Celestron Off-Axis Guider: Weight: 18 oz (510 g) Clear Aperture: 48mm (1.89 in) Package Contents: Celestron Off-Axis Guider Celestron 93648: Off-Axis Guider