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 6×30 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/Losmandy style. Both models are identical optically and with what is included in each package.
|OPTICAL TUBE INFO:|
|Focal Length||2350mm (93″)|
|Focal Length of Eyepiece 1||25mm (0.98″)|
|Magnification of Eyepiece 1||94x|
|Star Diagonal||1.25″ Star Diagonal|
|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/Vixen or CGE/Losmandy Dovetail Bar available|