C8-A XLT CG-5 Optical Tube Assembly

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C8-A XLT CG-5 Optical Tube Assembly

91020-XLT
  • $1,999.00

8" Schmidt-Cassegrain Optical Tube Assembly, Aluminum Optical Tube , Celestron's premium StarBright XLT coatings

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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

Specfications

  • 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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