Celestron CGEM 925, 9.25" Schmidt-Cassegrain Telescope

SKU: CNCGEM925 MFR: 11098
Celestron CGEM 925: Picture 1 thumbnail Celestron CGEM 925: Picture 2 thumbnail

List Price: $4,897.95

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About Celestron CGEM 925

Celestron CGEM-925 features the high-end 9.25" Schmidt Cassegrian OTA with XLT coatings mounted on our brand new CGEM mount.
TheCGEM mounthas a fresh, attractive, bold appearance and is capable of carrying Celestrons higher-end SCT optical tubes (up to 11") securely and vibration free which is ideal for both imaging and visual observing.
Ergonomic Design -CGEM was designed to be ergonomically friendly with large Altitude and Azimuth adjustment knobs for quick and easy polar alignment adjustment. The internal RA and DEC motor wiring provides a clean look and an easy and trouble free set up.
Innovation -The CGEM series has a new innovative Polar alignment procedure called All-Star. All-Star allows users to choose any bright star, while the software calculates and assists with polar alignment. Another great feature of the CGEM, sure to please astroimagers, is the Permanent Periodic Error Correction (PEC) which will allow users to train out the worm gears periodic errors, while the mount retains the PEC recordings.
Performance -For objects near the Meridian (imaginary line passing from North to South), the CGEM will track well past the Meridian for uninterrupted imaging through the most ideal part of the sky. The CGEM mount has a robust database with over 40,000 objects, 100 user defined programmable objects and enhanced information on over 200 objects.Celestron's CGEM mount is the perfect fit between the Advanced Series and CGE Series. Offering the portability of the Advanced Series and the precision of the CGE

For two years, Celestron will cover repairs or replacement of this product in cases of defective components or damage from normal wear and tear.

Celestron CGEM 925 Features

  • 9.25" Schmidt-Cassegrain telescope
  • CGEM Computerized Equatorial Mount
  • Schmidt-Cassegrain mechanism that moves the primary mirror to adjust focus is supported by two pre-loaded ball bearings, minimizing the "mirror flop" typical of bushing focus mechanisms
  • Celestron's premium StarBright XLT coatings
  • 6x30 finderscope to help accurately find objects
  • Ultra Sturdy 2" steel tripod with Accessory Tray
  • Star diagonal provides more comfortable viewing position when observing objects that are high in the sky
  • Computerized Mount Features40,000 object database with over 100 user-definable objects and expanded information on over 200 objects
  • Proven NexStar computer control technology
  • Redesigned electronics deliver constant regulated power to the motors making them capable of driving the telescope even when not perfectly balanced
  • New "All-star" Polar alignment uses any bright star for a quick and accurate Polar alignment
  • Software Features include
  • Flash upgradeable hand control software and motor control units for downloading product updates over the Internet
  • Meridian preference for slewing - allows you to approach an object from the side of the Meridian that maximizes tracking (and imaging) time
  • Solar System alignment method - allows you to align your telescope and view the moon and planets during the day
  • Custom Rate 9 feature allows you set maximum slew rate
  • Tandem mode allows you to star align the mount even when positioned for tandem scope use
  • 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 stars; solar system objects and asterisms
  • Permanent Programmable Periodic Error Correction (PEC) - corrects for periodic tracking errors inherent to all worm drives
  • Drive Motors - Low Cog DC Servo motor with integrated optical encodes offer smooth, quiet operation and long life. The motor armatures are skewed to minimize cogging which is required for low speed tracking
  • Internal Cable wiring for trouble-free setup and transportation
  • Designated six-pin RJ-12 modular jack, ST-4 compatible guide port
  • Autoguide port and Auxiliary ports located on the electronic plate for long exposure astrophotography
  • Double line, 16-character Liquid Crystal Display Hand Control with backlit LED buttons for easy operation of goto features
  • RS-232 communication port on hand control to control the telescope via a personal computer
  • Includes NexRemote telescope control software, for advanced control of your telescope via computer
  • Precision machined 40 mm diameter steel Polar shafts supported by multiple tapered roller bearings and ball bearings.
  • GPS compatible with optional SkySync GPS Accessory
  • Secure power plug ensures that the mount's power source is not accidentally disconnected

Celestron CGEM 925 Specifications

Optical Design
Aperture (mm)
235 mm (9.25 in)
Focal Length
2350 mm (93 in)
Focal Ratio
Focal Length of Eyepiece 1 (mm)
25 mm (0.98 in)
Magnification of Eyepiece 1
94 x
Star Diagonal
Mount Type
Computerized Equatorial
Adjustable, Stainless Steel
Power Requirements
Car battery adapter
Highest Useful Magnification
555 x
Lowest Useful Magnification
34 x
Limiting Stellar Magnitude
Resolution (Rayleigh)
0.59 arc seconds
Resolution (Dawes)
0.49 arc seconds
Light Gathering Power
1127 x
Apparent Field of View
0.53 Degree
Secondary Mirror Obstruction
3.35 in (85 mm)
Secondary Mirror Obstruction by Diameter
Secondary Mirror Obstruction by Area
Optical Coatings
Starbright XLT Coatings
Optical Tube Length
22 in (559 mm)
Total Telescope Kit Weight
113 lbs (51 kg)
Weight of Counterweights
1 x 11 lbs <br />1 x 17 lbs
Slew Speeds
Nine slew speeds
Tracking Rates
Sidereal, Solar and Lunar
Tracking Modes
EQ North and EQ South
Alignment Procedures
2-Star Align, Quick Align, 1-Star Align, Last Alignment, Solar System Align
Computer Hand Control
Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons
40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects
Optional SkySync GPS Accessory
2-year Telescope Warranty
Mfr #

Questions & Answers Powered by TurnTo®

Questions about this item:

Shopper  Can I purchase this with the CGEM DX mount instead of the standard CGEM?
JOHN Z  Sort of... They will sell each component to you separately, but it will cost you. Current sale aside, you would pay a couple hundred dollars more total, in addition to the extra cost of the CGEM DX mount itself, to purchase a 925 DX. I too wanted the 925 on the DX mount, but Celestron does not sell it that way as a package. The 925 OTA is $1300 by itself and the CGEM DX mount is $1700 (reg $1900, but currently has a $200 rebate). So, you would be looking at roughly $3000 if you purchased the 925 w/ a DX mount right now versus the current ~$2500 price of the standard CGEM 925 package, a $500 difference. I will say though... After receiving the CGEM 925, my concerns about the CGEM mount are gone. I am actually glad I did not buy the DX because the standard CGEM is very sturdy and stable. It's also VERY heavy already and I wouldn't want to deal with the significant extra weight of the DX. I plan to use this set up to do some astro-photography and I am confident that the CGEM mount with the 925 OTA will be able to handle the added weight of a camera, etc.
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