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Celestron C8 8" XLT Schmidt-Cassegrain Optical Tube Assembly

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SKU 91020XLT
Dovetail Option

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  • 8" Schmidt-Cassegrain Optical Tube Assembly (OTA)
  • Celestron's premium StarBright XLT coatings
  • Aluminium Optical Tube
  • 2032 mm focal length (f/10)
  • 25 mm eyepiece included (81x)
  • 1.25" visual back for use with 1.25" accessories
  • 6x30 finderscope to help accurately find objects
  • Star diagonal provides more comfortable viewing position when observing objects that are high in the sky
  • CG-5 or CGE dovetail rail options

This 8" aperture optical tube assembly (OTA) is the most popular size of Celestron's Schmidt-Cassegrain range.  It features Celestron's StarBright XLT coatings on the corrector plate for maximum light transmission. The telescope has a 2032mm focal length (f/10) making it a good overall performer on a range of celestial objects. 

The telescope comes with a star diagonal for more comfortable viewing of high altitude objects and a 25mm Plossl eyepiece which gives 81x magnification. A 6x30 finderscope to help locate objects completes the package. 

There are two dovetail bar versions of the C8 available - a CG-5 and a wider CGE style. Both models are identical optically and with what is included in each package.  

Optical Design Schmidt-Cassegrain
Aperture 203.2mm (8")
Focal Length 2032mm (80")
Focal Ratio f/10
Focal Length of Eyepiece 1 25mm (0.98")
Magnification of Eyepiece 1 81x
Finderscope 6x30
Star Diagonal 1.25" Star Diagonal
Optical Tube Aluminum
Highest Useful Magnification 480x
Lowest Useful Magnification 29x
Limiting Stellar Magnitude 14
Resolution (Rayleigh) 0.69 arc seconds
Resolution (Dawes) 0.57 arc seconds
Light Gathering Power (Compared to human eye) 843x
Secondary Mirror Obstruction 64mm (2.5")
Secondary Mirror Obstruction by Diameter 31%
Secondary Mirror Obstruction by Area 9.77%
Optical Coatings StarBright XLT
Optical Tube Length 432mm (17")
Optical Tube Diameter 238mm (9.37")
Optical Tube Weight 12.5 lbs (5.67 kg)
Dovetail CG-5 & CGE available