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Celestron C8-A XLT (CG-5) Optical Tube Assembly



DESCRIPTION General Features 8" Schmidt-Cassegrain Optical Tube Assembly Aluminum Optical Tube Celestron's premium StarBright XLT coatings 2032 mm focal length (f/10) 25 mm eyepiece included (81x) Visual back allows 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 Includes dovetail rail compatible with CG-5 Advanced Series mount FEATURES 8" Schmidt-Cassegrain Optical Tube Assembly Aluminum Optical Tube Celestron's premium StarBright XLT coatings 2032 mm focal length (f/10) 25 mm eyepiece included (81x) Visual back allows 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 Includes dovetail rail compatible with CG-5 Advanced Series mount SPECIFICATIONS PUBLIC SPECS Optical Design: Schmidt-Cassegrain Aperture (mm): 203.2 mm (8 in) Focal Length: 2032 mm (80 in) Focal Ratio: 10 Focal Length of Eyepiece 1 (mm): 25 mm (0.98 in) Magnification of Eyepiece 1: 81 x Finderscope: 6x30 Star Diagonal: 1.25 Optical Tube: Aluminum Highest Useful Magnification: 480 x Lowest Useful Magnification: 29 x Limiting Stellar Magnitude: 14 Resolution (Rayleigh): 0.69 arc seconds Resolution (Dawes): 0.57 arc seconds Light Gathering Power (Compared to human eye): 843 x Secondary Mirror Obstruction: 2.5 in (64 mm) Secondary Mirror Obstruction by Diameter: 31% Secondary Mirror Obstruction by Area: 9.77% Optical Coatings: StarBright XLT Optical Tube Length: 17 in (432 mm) Optical Tube Weight: 12.5 lbs (5.67 kg) Dovetail Compatibility: CG-5 Mount

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