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Celestron C9.25 9.25" XLT Schmidt-Cassegrain Optical Tube Assembly

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SKU 91025XLT
Dovetail Option

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  • 9.25" Schmidt-Cassegrain Optical Tube Assembly
  • Celestron's premium StarBright XLT coatings
  • Aluminium Optical Tube
  • 2350 mm focal length (f/10)
  • 25 mm eyepiece included (94x)
  • 1.25" visual back 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
  • CG-5 or CGE dovetail rail options

This 9.25" aperture optical tube assembly (OTA) is one the most popular size of Celestron's Schmidt-Cassegrain range and also one its most well regarded too. The telescope is not too large or too heavy to handle meaning that it can be used on a wide range of popular mid-range mounts such as Celestron's Advanced VX.

The C9.25 features Celestron's StarBright XLT coatings on the corrector plate for maximum light transmission. The telescope has a 2350mm focal length (f/10) making it a good overall performer on a range of celestial objects. 

The telescope comes with a star diagonal for more comfortable viewing of high altitude objects and a 25mm Plossl eyepiece which gives 94x magnification. A 6x30 finderscope to help locate objects completes the package. 

There are two dovetail bar versions of the C9.25 available - a CG-5/Vixen style and a wider CGE style. Both models are identical optically and with what is included in each package.  

Optical Design Schmidt-Cassegrain
Aperture 2345mm (9.25")
Focal Length 2350mm (93")
Focal Ratio f/10
Focal Length of Eyepiece 1 25mm (0.98")
Magnification of Eyepiece 1 94x
Finderscope 6x30
Star Diagonal 1.25" Star Diagonal
Optical Tube Aluminum
Highest Useful Magnification 555x
Lowest Useful Magnification 34x
Limiting Stellar Magnitude 14.4
Resolution (Rayleigh) 0.59 arc seconds
Resolution (Dawes) 0.49 arc seconds
Light Gathering Power (Compared to human eye) 1127x
Secondary Mirror Obstruction 85mm (3.35")
Secondary Mirror Obstruction by Diameter 36%
Secondary Mirror Obstruction by Area 13%
Optical Coatings StarBright XLT
Optical Tube Length 559mm (22")
Optical Tube Diameter 271.78mm (10.7")
Optical Tube Weight 20 lbs (9.07 kg)
Dovetail CG5 or CGE Dovetail Bar available