CELESTRON • C8-A XLT (CG-5) 8" Optical Tube Assembly (OTA) - 91020XLT
As the larger cousin to the C6-A XLT, the Celestron C8-A XLT has 843x the light gathering power of the human eye which dwarfs smaller telescopes of this scale. As a Schmidt-Cassegrain optical tube assembly, the corrector plate and primary mirrors render a focal ratio of f/10 which makes these type of catadioptric designs excellent for both visual and imaging as well as being compatible with many optical accessories to adjust its field of view and focal length. With the addition of Celestron's own StarBright XLT coatings, this helps improve light transmission as well, making the C8-A XLT great for planetary and terrestrial observing to wide field observing of deep sky objects. One accessory suggested is the Focal Reducer by Celestron (NOT INCLUDED, SOLD SEPARATELY!) will reduce the focal ratio of this optical tube to an f/6.3 which is much faster for observing and imaging deep sky objects, especially when using large pixels on larger end CCD chips. For the visual astronomer, this optical tube comes packaged with visual accessories including a 25mm eyepiece (for a magnification of 81x), star diagonal, 1.25" visual back, and 6x30 finderscope. The mounting connection is a dovetail rail that connects to the CG-5 mount.
FACTS AND FEATURES:
- 8 inch aperture
- f/10 focal ratio
- Schmidt-Cassegrain optical tube
- StarBright XLT Coatings
- 6x30 finderscope
- 1.25" visual back
- 25mm eyepiece
- Star Diagonal
Celestron’s excellent Schmidt-Cassegrain telescopes are compact and portable and represent the best all-purpose design for a wide variety of uses from terrestrial and deep sky viewing to astrophotography.
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