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CGEM II 800 Schmidt-Cassegrain Telescope12010

  • - 8" Schmidt-Cassegrain optical tube assembly
  • - Celestron's premium StarBright XLT coatings
  • - 40 lbs payload capacity
  • - Dual-fit Vixen/CG-5 and Losmandy/CGE dovetail saddle
  • - 2" steel legs with height index marks for quick leveling
  • - Internal cabling throughout for worry-free remote operation
  • - Able to track past the meridian allowing seamless imaging
  • - USB hand control to control the telescope via a personal computer

The CGEM II 800 Schmidt-Cassegrain Telescope features Celestron’s premium StarBright XLT coated optics and the newly redesigned CGEM II computerized equatorial mount. It is the most lightweight and portable of the three size models. This telescope is especially at home as a solid platform for long exposure photography with optional CCD cameras or photographic equipment. At 8 inches of aperture with the premium StarBright XLT coatings, the CGEM II 800 gives you over 800 times the light gathering power than the unaided eye.

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
  • -Permanent Programmable Periodic Error Correction (PEC) corrects periodic tracking errors inherent to all worm drives
  • -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


CGEM II 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.


he CGEM II series features Celestron’s 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 II 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.


For objects near the Meridian (imaginary line passing from North to South), the CGEM II will track well past the Meridian for uninterrupted imaging through the most ideal part of the sky. The CGEM II 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 II 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.

Alignment ProceduresAutoAlign, 2-Star Align, Quick Align, 1-Star Align, Last Alignment, Solar System AlignAperture (mm)203.2 mm (8 in)Computerized Hand ControlDouble line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons, USB 2.0 port for PC connectionDatabase40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objectsDovetail CompatibilityCGE MountDovetail MountDirectly connects to both CG-5 & CGE dovetail barsFinderscpoe6x30Focal Length2032 mm (80 in)Focal Length of Eyepiece 1 ...25 mm (0.98 in)Focal Ratio10Highest Useful Magnification480 xLatitude Range15" " 70"Light Gathering Power (Comp...843 xLimiting Stellar Magnitude14Lowest Useful Magnification29 xMagnification of Eyepiece 181 xMotor DriveLow cog DC servo motorsMount Info:N.A.Mount TypeGerman Equatorial MountMount Weight40 lbsOptical CoatingsStarBright XLTOptical DesignSchmidt-CassegrainOptical TubeAluminumOptical Tube Info:N.A.Optical Tube Length17 in (432 mm)Optical Tube Weight12.5 lbs (5.67 kg)Payload Capacity40 lbsPorts1x Hand control port, 1x Auxiliary Port, 1x Auto guider port, 1 USB 2.0 port (on hand control)Power Requirements12 VDC, 3.2 ampsResolution (Dawes)0.57 arc secondsResolution (Rayleigh)0.69 arc secondsSecondary Mirror Obstructio...9.77%Secondary Mirror Obstruction2.5 in (64 mm)Slew Speeds9 slew speedsStar Diagonal1.35Total Weight of Mount Kit77 lbsTracking ModesEQ North and EQ SouthTracking RatesSidereal, Solar and LunarTripod2" Steel tripod with graduated markings on lower sectionTripod Weight20 lbsWeight of Counterweight17 lbs

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