C11-A XLT CG-5 Optical Tube Assembly

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C11-A XLT CG-5 Optical Tube Assembly

91067-XLT
  • $4,672.00

11" Schmidt-Cassegrain Optical Tube Assembly Aluminum Optical Tube with Celestron's premium StarBright XLT coatings

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Description

General Features

  • 11" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2800 mm focal length (f/10)
  • 40 mm eyepiece included (70x)
  • Visual back allows for use with 1.25" accessories
  • 9x50 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

  • 11" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2800 mm focal length (f/10)
  • 40 mm eyepiece included (70x)
  • Visual back allows for use with 1.25" accessories
  • 9x50 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): 279.4 mm (11 in)
  • Focal Length: 2800 mm (110 in)
  • Focal Ratio: 10
  • Focal Length of Eyepiece 1 (mm): 40 mm (1.57 in)
  • Magnification of Eyepiece 1: 70 x
  • Finderscope: 9x50
  • Star Diagonal: 1.25
  • Optical Tube: Aluminum
  • Highest Useful Magnification: 660 x
  • Lowest Useful Magnification: 40 x
  • Limiting Stellar Magnitude: 14.7
  • Resolution (Rayleigh): 0.5 arc seconds
  • Resolution (Dawes): 0.42 arc seconds
  • Light Gathering Power (Compared to human eye): 1593 x
  • Secondary Mirror Obstruction: 3.75 in (95 mm)
  • Secondary Mirror Obstruction by Diameter: 34%
  • Secondary Mirror Obstruction by Area: 12%
  • Optical Coatings: StarBright / XLT
  • Optical Tube Length: 24 in (610 mm)
  • Optical Tube Weight: 27.5 lbs (12 kg)
  • Dovetail Compatibility: CG-5 Mount

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