Celestron Schmidt-Cassegrain C11 XLT CGE optical tube
Celestron Schmidt-Cassegrain C11" XLT CGE optical tube (OTA) features 280 mm mirror, F/10 focal ratio. 40 mm Plössl eyepiece and 9x50 finder view included.
Celestron Schmidt-Cassegrain C11" XLT CGE optical tube (OTA) features 280 mm mirror, F/10 focal ratio. 40 mm Plössl eyepiece and 9x50 finder view included.
OVERVIEW
- 11" Schmidt-Cassegrain Optical Tube Assembly
- Aluminum Optical Tube
- Celestron's premium StarBright XLT coatings
- 2800 mm focal length (f/10)
- 40 mm 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 CGE mount
DESCRIPTION
GENERAL FEATURES
11" Schmidt-Cassegrain Optical Tube Assembly
Aluminum Optical Tube
Celestron's premium StarBright XLT coatings
2800 mm focal length (f/10)
40 mm 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 CGE mount
SPECIFICATIONS
|
Optical Design |
Schmidt-Cassegrain |
|
Aperture (mm) |
279.4 mm (11 in) |
|
Focal Length |
2800 mm (110 in) |
|
Focal Ratio |
10 |
|
Focal Length of Eyepiece 1 (mm) |
40 mm (1.57 in) |
|
Magnification of Eyepiece 1 |
70 x |
|
Finderscope |
9x50 |
|
Star Diagonal |
1.25 |
|
Optical Tube |
Aluminum |
|
Highest Useful Magnification |
660 x |
|
Lowest Useful Magnification |
40 x |
|
Limiting Stellar Magnitude |
14.7 |
|
Resolution (Rayleigh) |
0.5 arc seconds |
|
Resolution (Dawes) |
0.42 arc seconds |
|
Light Gathering Power (Compared to human eye) |
1593 x |
|
Secondary Mirror Obstruction |
3.75 in (95 mm) |
|
Secondary Mirror Obstruction by Diameter |
34% |
|
Secondary Mirror Obstruction by Area |
12% |
|
Optical Coatings |
StarBright / XLT |
|
Optical Tube Length |
24 in (610 mm) |
|
Optical Tube Weight |
27.5 lbs (12 kg) |
|
Dovetail Compatibility |
CGE Mount |
| Product Status | New |
|---|---|
| Package width | 63 cm |
| Package height | 38 cm |
| Package depth | 38 cm |