Celestron C11-A (XLT) Schmidt-Cassegrain OTA for CG5 91067-XLT

Manufactured by: Celestron
Model: 91067-XLT


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Celestron C11-A (XLT) 11.0"/279mm Aluminum Schmidt-Cassegrain Telescope Optical Tube Assembly (2800mm f/10.0) for the CG-5 Mount with StarBright XLT Coatings.

  • 11" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2800mm focal length (f/10)
  • 40mm 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/Vixen Advanced Series mount

Optical DesignSchmidt-Cassegrain
Aperture (mm)279.4 mm (11 in)
Focal Length2800 mm (110 in)
Focal Ratio10
Focal Length of Eyepiece 1 (mm)40 mm (1.57 in)
Magnification of Eyepiece 170 x
Star Diagonal1.25
Optical TubeAluminum
Highest Useful Magnification660 x
Lowest Useful Magnification40 x
Limiting Stellar Magnitude14.7
Resolution (Rayleigh)0.5 arc seconds
Resolution (Dawes)0.42 arc seconds
Light Gathering Power (Compared to human eye)1593 x
Secondary Mirror Obstruction3.75 in (95 mm)
Secondary Mirror Obstruction by Diameter34%
Secondary Mirror Obstruction by Area12%
Optical CoatingsStarBright / XLT
Optical Tube Length24 in (610 mm)
Optical Tube Weight27.5 lbs (12 kg)
Dovetail CompatibilityCGE Mount

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