The CGEM II 800 Schmidt-Cassegrain Telescope boasts Celestron's top-tier StarBright XLT coated optics, paired with the newly revamped CGEM II computerized equatorial mount. Among the three available size models, it stands out as the most lightweight and portable. This telescope excels as a stable platform for long exposure photography, accommodating optional CCD cameras or photographic equipment. With its 8-inch aperture and premium StarBright XLT coatings, the CGEM II 800 offers more than 800 times the light gathering power of the unaided eye.

The CGEM II mount has received a contemporary update, showcasing a fresh, eye-catching design. It is fully capable of securely supporting Celestron's higher-end SCT optical tubes, accommodating sizes of up to 11 inches, and ensuring minimal vibrations—a feature highly desirable for both imaging and visual observation. With a remarkable payload capacity of 40 lbs. and a swift slew rate of 5° per second, you can effortlessly point to any celestial object found in the extensive database.

Ergonomic Design

The CGEM II was carefully crafted with user comfort in mind, incorporating generously sized Altitude and Azimuth adjustment knobs for rapid and straightforward polar alignment adjustments. The internal RA and DEC motor wiring contribute to a tidy appearance while facilitating a hassle-free setup.

Innovation

The CGEM II series introduces Celestron's groundbreaking Polar alignment procedure, aptly named All-Star™. This innovative feature allows users to select any bright star, with the software then calculating and assisting with polar alignment. Astroimagers will particularly appreciate the Permanent Periodic Error Correction (PEC), enabling users to mitigate periodic errors in the worm gears while retaining the PEC recordings.

Performance

When it comes to objects near the Meridian—an imaginary line extending from North to South—the CGEM II excels by providing robust tracking capabilities well beyond the Meridian. This ensures uninterrupted imaging during the most favorable part of the night sky. With an extensive database housing over 40,000 objects, support for 100 user-defined programmable objects, and enhanced information on more than 200 objects, Celestron's CGEM II mount strikes a perfect balance between the portability of the Advanced Series and the precision of the CGE Series. This makes it an ideal choice for both amateur astronomers and astrophotographers alike.

Specifications

MOUNT INFO:
Optical Design:	Schmidt-Cassegrain
Aperture:	203.2mm (8")
Focal Length:	2032mm (80")
Focal Ratio:	f/10
Focal Length of Eyepiece 1:	25mm (.98")
Magnification of Eyepiece 1:	81x
Finderscope:	6x30
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:	12.5 lbs (5.67 kg)
Dovetail:	CGE Dovetail Bar
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:	90.5 lbs (41 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
Solar Warning	Never look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result. Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it. Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.
California Residents	WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Software and Documentation

MANUALS:
CGEM II EQ Mount Manual
NexStar Plus Hand Control Manual
Schmidt-Cassegrain Optics Manual
SOFTWARE & FIRMWARE:
CPWI Software
Celestron Firmware Manager (CFM) Software
NexRemote Telescope Control Software
Periodic Error Correction Tool (PECTool)
OTHER PRODUCT FILES:
SCT & EdgeHD Collimation Guide
How to Align a Red Dot Finder to Your Telescope Video
Solar Safety Warning
What are the Sizes of Collimation Screws
Celestron NexStar+ Hand Control Troubleshooting Guide

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Celestron CGEM II 800 SCT

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