Celestron G-9.25 - Technical Specifications

52 • Telescope Maintenance
TECHNICAL SPECIFICATIONS
Below is pertinent technical information on your Celestron G-9
1
/
4
telescope that you
may find useful.
GENERAL:
OPTICAL TUBE: G-9
1
/
4
Optical System: Schmidt-Cassegrain
Aperture: 9.25" (235mm)
Focal Length: 2350mm (92.5")
F/ratio: f/10
Secondary Mirror Diameter
Obstruction 3.35” or 13.1% by Area
Aluminized Surface 2.75”
Highest Useful Power Magnification: 555x
Lowest Useful Power Magnification: 34x
Resolution (arc seconds): 0.58
Photographic Resolution: 182 lines/mm
Exit Pupil with standard eyepiece: 2.6mm
Light Gathering Power: 1127x unaided eye
Limiting Visual Magnitude: 14.4
Near Focus
with eyepiece: ~60ft
with camera: ~60ft
Front Cell O.D. 10.5”
Optical Tube Length: 21
5
/
8
"
Weight of Optical Tube 20 lbs.