Celestron C9.25-XLT CG5 Schmidt-Cassegrain optical tube
Celestron C9.25-XLT CG5 Schmidt-Cassegrain optical tube features 235 mm aperture, F/10 focal ratio. 25 mm Plössl eyepiece, diagonal and 6x30 finder view included.
Celestron C9.25-XLT CG5 Schmidt-Cassegrain optical tube features 235 mm aperture, F/10 focal ratio. 25 mm Plössl eyepiece, diagonal and 6x30 finder view included.
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 |
| Product Status | New |
|---|