CGEM II 9.25 EdgeHD

SKU: 12018

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  • Regular price $4,599.00

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  • 9.25” EdgeHD optics
  • CGEM II computerized equatorial mount
  • Celestron’s premium StarBright XLT coatings provide maximum light transmission
  • A 9x50 finderscope, 2” mirror diagonal for more comfortable viewing, and wide-angle 23 mm Luminos 2" eyepiece are all included


True Astrograph Quality
Many optical designs that advertise themselves as "astrographs" actually only produce pinpoint stars across a curved focal plane. While this may be acceptable for some visual observing, stars will appear out of focus at the edge when used with the flat chip sensor of a digital camera. EdgeHD optics produce a focal plane more than three-times flatter than a standard Schmidt-Cassegrain telescope and dramatically flatter than competing coma-free designs. This guarantees you visibly sharp stars across some of the largest CCD chips available today.

    Individually Tested
    Every EdgeHD that ships has been tested not only for the surface quality of each optical component, but also with a camera and artificial star to ensure the imaging system meets our rigid quality assurance. This “final acceptance test” confirms the EdgeHD will perform in the field and deliver high-quality astroimages.


    A fresh update to the venerable CGEM mount, the CGEM II has a fresh, attractive, bold appearance and is capable of carrying Celestron’s higher-end SCT optical tubes (up to 11") securely and vibration free, which is ideal for both imaging and visual observing. Capable of holding 40 lbs. of payload and slewing at 5° per second, you will be able to instantly point to any of the celestial objects in the database.  


      • 40 lbs payload capacity
      • Dual-fit Vixen/CG-5 and Losmandy/CGE dovetail saddle
      • 2" steel legs with height index marks for quick leveling
      • USB 2.0 port on hand control for direct links to a PC via ASCOM supported software
      • 40,000 object database with over 100 user-definable objects and expanded information on over 200 objects
      • Internal cabling throughout for worry-free remote operation
      • Low cog DC Servo motor with integrated optical encoders offer smooth, quiet operation
      • Able to track past the meridian allowing seamless imaging
      • Permanent periodic error corrections allow users to train out the worm gears periodic errors once, while the mount retains the PEC recordings.
      • Software Features include: Mount Calibration, Database Filter Limits, Hibernate, five Alignment Procedures, and user-defined slew limits
      • Built-in polar alignment program to polar align on any star in the sky
      • Longer clutch levers to make tightening and loosening of clutches easier
      • Custom database lists of all the most famous deep-sky objects by name and catalog number
      • Solar System alignment method allows to view the moon and planets during the day
      • Custom Rate 9 feature allows to set maximum slew rate
      • Tandem mode allows to star align the mount even when positioned for tandem scope use
      • USB hand control to control the telescope via a personal computer
      • Includes NexRemote telescope control software, for advanced control of 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
      Alignment Procedures AutoAlign, 2-Star Align, Quick Align, 1-Star Align, Last Alignment, Solar System Align
      Aperture (mm) 234.95 mm (9.25 in)
      Computerized Hand Control Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons, USB 2.0 port for PC connection
      Database 40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects
      Dovetail Compatibility CGE Mount
      Dovetail Mount Directly connects to both CG-5 & CGE dovetail bars
      Finderscpoe 9x50
      Focal Length 2350 mm (93 in)
      Focal Length of Eyepiece 1 ... 23 mm (0.91 in)
      Focal Ratio 10
      Highest Useful Magnification 555 x
      Latitude Range 15" " 70"
      Light Gathering Power (Comp... 1127 x
      Limiting Stellar Magnitude 14.4
      Lowest Useful Magnification 34 x
      Magnification of Eyepiece 1 102 x
      Motor Drive Low cog DC servo motors
      Mount Info: N.A.
      Mount Type German Equatorial Mount
      Mount Weight 40 lbs
      Optical Coatings StarBright XLT
      Optical Design EdgeHD
      Optical Tube Aluminum
      Optical Tube Info: N.A.
      Optical Tube Length 22 in (559 mm)
      Optical Tube Weight 21 lbs. (9.53 kg)
      Payload Capacity 40 lbs
      Ports 1x Hand control port, 1x Auxiliary Port, 1x Auto guider port, 1 USB 2.0 port (on hand control)
      Power Requirements 12 VDC, 3.2 amps
      Resolution (Dawes) 0.49 arc seconds
      Resolution (Rayleigh) 0.59 arc seconds
      Secondary Mirror Obstructio... 13%
      Secondary Mirror Obstruction 3.35 in (85 mm)
      Slew Speeds 9 slew speeds
      Star Diagonal 2" w/ 1.25" adapter
      Total Weight of Mount Kit 77 lbs
      Tracking Modes EQ North and EQ South
      Tracking Rates Sidereal, Solar and Lunar
      Tripod 2" Steel tripod with graduated markings on lower section
      Tripod Weight 20 lbs
      Weight of Counterweight 1 x 17 lbs, 1 x 11 lbs counterweights
      Barcode: 050234120180