Celestron CGEM II 800 EdgeHD 8" Schmidt-Cassegrain Telescope
CGEM II 800 HD combines Celestron's newly redesigned CGEM II computerized equatorial mount with its acclaimed EdgeHD optical system. With 8 inches of aperture and our premium StarBright XLT coatings, the CGEM II 800 HD gives you over 800 times the light gathering power than the unaided eye and is the lightest and most portable telescope in its class.
OPTICAL TUBE INFO:
See the Universe in HD
EdgeHD is an aplanatic, flat field Schmidt-Cassegrain telescope that produces aberration-free images across a wide visual and photographic field of view. The optical system was designed to reduce more than just off-axis star coma; it also provides an astrograph-quality flat focal plane all the way to the edge of the field of view.
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.
MOUNT INFO:
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.
ERGONOMIC DESIGN
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.
INNOVATION
The 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.
PERFORMANCE
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.

OPTICAL TUBE INFO:    
Optical Design:    EdgeHD
Aperture:    203.2mm (8")
Focal Length:    2032mm (80")
Focal Ratio:    f/10
Focal Length of Eyepiece 1:    40mm (1.57")
Magnification of Eyepiece 1:    51x
Finderscope:    9x50
Star Diagonal:    1.25" Star Diagonal
Optical Tube:    Aluminum
Highest Useful Magnification:    480x
Lowest Useful Magnification:    29x
Limiting Stellar Magnitude:    14
Resolution (Rayleigh):    0.69 arc seconds
Resolution (Dawes):    0.57 arc seconds
Light Gathering Power (Compared to human eye):    843x
Secondary Mirror Obstruction:    64mm (2.5")
Secondary Mirror Obstruction by Diameter:    31%
Secondary Mirror Obstruction by Area:    9.77%
Optical Coatings:    StarBright XLT
Optical Tube Length:    432mm (17")
Optical Tube Diameter:    238mm (9.37")
Optical Tube Weight:    14 lbs (6.35 kg)
Dovetail:    CGE Dovetail Bar
MOUNT INFO:    
Mount Type:    Computerized Equatorial
Instrument load capacity:    40 lbs (18 kg)
Height adjustment range (includes mount and tripod):    1346mm - 1651mm (53" – 65")
Tripod Leg Diameter:    50.8mm (2") Steel tripod with graduated markings on lower section
Latitude adjustment range:    15° - 70°
Mount Head Weight:    40 lbs (18.14 kg)
Accessory Tray:    Yes
Tripod Weight:    20 lbs (9 kg)
Weight of Counterweights:    1 x 17 lbs
Slew Speeds:    9 slew speeds - max speed 4.5°/second
Tracking Rates:    Sidereal, Solar and Lunar
Tracking Modes:    EQ North and EQ South
GPS:    N/A
Dovetail Compatibility:    Dual saddle plates (CG-5 and CGE saddle)
Number of Auxiliary Ports:    2 AUX Ports (1x Hand control Port and 1x AUX Port for optional accessories)
Autoguide Port:    Yes
USB Port:    Yes, input on Hand Control
Power Requirements:    12V DC, 3.2 amps
Motor Drive:    DC servo motors
Alignment Procedures:    2-Star Align, 1-Star Align, Solar System Align, Last Alignment, Quick Align
Periodic Error Correction:    Yes
Computerized Hand Control:    2 line x 18 character backlit Liquid Crystal Display, 19 LED backlit buttons, USB 2.0 Port for PC connection
NexStar+ Database:    40,000+ objects, 100 user defined programmable objects Enhanced information on over 200 objects
Software:    Celestron Starry Night Special Edition Software and SkyPortal App
Total Kit Weight:    92 lbs (41.7 kg)
Included Items:    CGEM II Equatorial Head 
Tripod 
Accessory Tray 
1 x 17 lbs counterweight 
NexStar+ Hand Control 
DC Power Cable (item#18769) 
Hand Control Holster