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Celestron CGEM 1100 Computerized Schmidt Cassegrain Telescope

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Product Description

Celestron CGEM 1100 Computerized Schmidt Cassegrain Telescope


TheCelestron CGEM 1100 Computerized Telescope features a high-end 11" Schmidt Cassegrain OTA with the famous XLT coatings mounted on our brand new CGEM™ mount. Ergonomic CGEM MountDesign The CGEM™ mount is not just a pretty face with its new and bold appearance. It is fully capable of carrying Celestron’s higher-end SCT optical tubes securely and vibration free. This makes it perfect for both imaging and visual observing purposes. 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. Ingenius Innovation The CGEM series aim to make things easier with the All-Star Polar Alignment procedure which allows you to choose any bright star in the sky, while the software calculates and assists with polar alignment. Another reason why the CGEM is great for astrophotography is the Permanent Periodic Error Correction (PPEC).This feature is meant to train out the worm gears periodic errors, while allowing for the mount to maintain the PPEC recordings. Great Performance For objects near the Meridian (which is 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. 

Celestron CGEM 1100 Computerized Telescope Features: 

11" Schmidt-Cassegrain telescope

CGEM Computerized Equatorial Mount

Ultra sturdy 2" steel tripod with Accessory Tray

40,000 object database with 400 user-definable objects and expanded information on over 200 objects

NexStar computer control technology

Flash upgradeable hand control software and motor control units for downloading product updates over the Internet

New "All-star" Polar alignment uses any bright star for a quick and accurate Polar alignment

Software Features include: Mount Calibration, Database Filter Limits, Hibernate, five Alignment Procedures, and user-defined slew limits

Permanent programmable periodic error correction (PPEC)

Steel worm gear and 90mm pitch diameter brass worm wheel

Drive Motors - Low Cog DC Servo motor with motor armatures thatare skewed to minimize cogging which is required fro low speed tracking.

Designated six-pin RJ-12 modular jack, ST-4 compatible guide port

Double line, 16-character Liquid Crystal Display Hand Control with backlit LED buttons for easy operation of goto features

Autoguide port and auxiliary ports located on the electronic pier for long exposure astrophotography

RS-232 communication port on hand control

Includes NexRemote telescope control software

GPS-compatible with optional CN16 GPS Accessory


Celestron CGEM 1100 Computerized Schmidt Cassegrain Telescope



Optical Design

11" Schmidt-Cassegrain


280 mm (11 in)

Focal Length

2800 mm (110 in)

Focal Ratio





Computerized Equatorial

Optical Tube


Optical Coatings

Starbright XLT Coating

Eyepiece 1

40 mm (1.57 in)

Magnification 1

70 x

Star Diagonal



Adjustable, Stainless Steel


NexRemote control software with RS232 cable

Power Supply

Car battery adapter

Highest Useful Magnification

661 x

Lowest Useful Magnification

40 x

Limiting Stellar Magnitude


Eyepiece 1 Field of View

0.71 °

Light Gathering Power

1600 x

Angular Field of View

0.71 °

Secondary Mirror Obstruction

3.75 in (95 mm)

Secondary Mirror Obstruction by Area

34 %

Secondary Mirror Obstruction by Diameter

33.8 %

Resolution (Rayleigh)

0.5 arcsec

Resolution (Dawes)

0.41 arcsec


Steel worm gear and 90mm pitch diameter brass worm wheel

Motor Drive

Low cog DC Servo motors with encoders, both axes

Computer Hand Control

Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons

Slew Speeds

Nine slew speeds: 5 �/sec, 2 �/sec, 1 �/sec, 64x, 16x, 8x, 4x, 1x, .5x

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

Software Precision

24bit, 0.08 calculation


40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects

Power Requirements

12 VDC 1.5 Amp


Optional CN16 Accessory


1 x 17 lb

Optical Tube Length

24 in (610 mm)

Telescope Weight

120 lb (54 kg)

User Level

For Advanced

Telescope Type


Aperture Size


Focal Length


Focal Ratio


Highest Practical Magnification






Mount Type

Computerized Mount




2 Years Limited Warranty


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