Celestron C11-A XLT (CGE) Optical Tube Assembly
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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 CGE mount
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- 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 CGE mount
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PUBLIC SPECS |
- 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: CGE Mount
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