The C9 1/4-SGT telescope combines the unequaled optical excellence of a Celestron 9 1/4 inch Schmidt-Cassegrain telescope with our computerized CG-5 German Equatorial mount for the ultimate economical astrophotography system.
The 9 1/4 inch was specifically designed for visual infinity focus when using 2 inch eyepieces and has an optimized baffle system to benefit astrophotography by minimizing vignetting at the edge of the field of view. Its longer primary focal length and lower magnification secondary mirror contribute to a flatter field of view at the focal plane and helps to further reduce optical aberrations.
This C9 1/4 optical system comes with our premium StarBright XLT coatings. The optimized baffling system benefits astrophotography and gives high contrast views of the planets. With 33 percent more light gathering than the 8 inch model, the C9 1/4-S is compatible with the complete line of Celestron photographic and visual accessories.
Mounted on the Advanced GT Series computerized mount, this telescope has some high performance software and hardware features. Operated by our proven NexStar computer control technology the telescope has a 40,000+ object database with 100 user-definable objects and expanded information on over 200 objects. Custom database lists of all the most famous deep-sky objects by name and catalog number; the most beautiful double, triple and quadruple stars; variable star; solar systems; objects and asterisms.
Using the RS-232 communication port on the hand control, you can control the telescope via a personal computer and our new flash upgradeable hand controls allow you to update your telescope's operating software via the internet. An autoguider port is also included for astrophotography.
C9 1/4-SGT (XLT) - General Features
- 9.25 Schmidt-Cassegrain telescope
- Starbright XLT high transmission coatings
- 6x30 finderscope to help accurately find objects
- Heavy Duty (CG-5GT) computerized German Equatorial mount
- Ultra sturdy 2 inch diameter steel tripod with accessory tray
- Star diagonal provides more comfortable viewing position when observing objects that are high in the sky
- Includes CD-ROM 'The Sky' Astronomy Software which provides education about the sky and printable sky maps
C9 1/4-SGT (XLT) - Computerized Mount Features
- Proven NexStar computer control technology
- 40,000 object database with over 100 user-definable objects and expanded information on over 200 objects
- Custom database lists of all the most famous deep-sky objects by name and catalog number; the most beautiful double, triple and quadruple stars; variable star; solar systems; objects and asterisms
- DC Servo motors with encoders on both axes
- Flash upgradeable hand control software and motor control units for downloading product updates over the Internet
- Autoguider port for long exposure astrophotography
- Double line, 16-character Liquid Crystal Display Hand Control with backlit LED buttons for easy operation of goto features
- Compatible with optional NexRemote telescope control software, for advanced control of your telescope via computer
- RS-232 communication port on hand control to control the telescope via a personal computer
- GPS-compatible with optional CN16 GPS Accessory (93966)
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 degrees
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 percent
Secondary Mirror Obstruction by Diameter: 36.2 percent
Optical Tube Length: 22 in (558.8 mm)
Telescope Weight: 73 lb (33.11 kg)
Counterweights: 2-11lb
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 degrees/sec
Tracking Rates: Sidereal, Solar and Lunar
Tracking Modes: EQ North and EQ South
Alignment Procedures: AutoAlign, 2-Star Alignment, Quick Align
Software Precision: 24bit, 0.08 arcsec calculation
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
