C9 1/4-A XLT (CG5)Optical Tube Assembly

$1,479.00
Article number: 91025-XLT
Availability: Order now!
Delivery time: Ships in 2-3 Days from our Warehouse

General Features

  • 9.25" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2350 mm focal length (f/10)
  • 25 mm eyepiece included (94x)
  • 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

Optical Design Schmidt-Cassegrain
Aperture (mm) 234.95 mm (9.25 in)
Focal Length 2350 mm (93 in)
Focal Ratio 10
Focal Length of Eyepiece 1 (mm) 25 mm (0.98 in)
Magnification of Eyepiece 1 94 x
Finderscope 6x30
Star Diagonal 1.25
Optical Tube Aluminum
Highest Useful Magnification 555 x
Lowest Useful Magnification 34 x
Limiting Stellar Magnitude 14.4
Resolution (Rayleigh) 0.59 arc seconds
Resolution (Dawes) 0.49 arc seconds
Light Gathering Power (Compared to human eye) 1127 x
Secondary Mirror Obstruction 3.35 in (85 mm)
Secondary Mirror Obstruction by Diameter 36%
Secondary Mirror Obstruction by Area 13%
Optical Coatings StarBright / XLT
Optical Tube Length 22 in (559 mm)
Optical Tube Weight 20 lbs (9.07 kg)
Dovetail Compatibility CG-5 Mount
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