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Celestron C9 1/4-SGT

Celestron C9 1/4-SGT

Optical Design : Schmidt-Cassegrain Aperture : 235 mm (9.25 in) Read more

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Specifications

Feature
Value
Comment
Optical Design :
Schmidt-Cassegrain
Aperture :
235 mm (9.25 in)
Focal Length :
2350 mm (92.52 in)
Focal Ratio :
10
Finderscope :
6x30
Mount :
CG-5 Equatorial
Eyepiece 1 :
25 mm (0.98 in)
Magnification 1 :
94 x
Star Diagonal :
1.25
Accessory Tray :
Yes
Tripod :
2 inch Stainless Steel
CD ROM :
"The Sky ® " Level 1
Power Supply :
Car Battery Adapter
Highest Useful Magnification :
555 x
Lowest Useful Magnification :
34 x
Limiting Stellar Magnitude :
14.4
Resolution (Rayleigh) :
0.59 arcsec
Resolution (Dawes) :
0.49 arcsec
Photographic Resolution :
200 line/mm
Light Gathering Power :
1127 x
Angular Field of View :
0.55 °
Linear Field of View (@1000 yds) :
29 ft (8.84 m)
Optical Coatings :
Starbright Coating/XLT
Secondary Mirror Obstruction :
3.35 in (85.09 mm)
Secondary Mirror Obstruction by Area :
13.1 %
Secondary Mirror Obstruction by Diameter :
36.2 %
Optical Tube Length :
22 in (558.8 mm)
Motor Drive :
DC Servo motors with encoders, both axes
Computer Hand Control :
Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons
Slew Speeds :
3°/sec
Tracking Rates :
Sidereal, Solar and Lunar
Tracking Modes :
EQ North and EQ South
Alignment Procedures :
AutoAlign, 2-Star Alignment, Quick Align
Communication Ports :
RS-232 communication port on hand control
Motor Ports :
Aux Port, Autoguide Ports
Database :
40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects
Telescope Weight :
73 lbs (33.11 kg)
Counterweights :
2-11 lbs
Software Precision :
24 bit, 0.08 arcsec calculation
Release Date
First seen
22 July 2008