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Celestron CGEM 800 EdgeHD Computerized Telescope

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in stock
$60.00 (Fixed shipping cost)
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1 unit(s)
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Product Description

Celestron CGEM 800 EdgeHD Computerized Telescope


The Celestron CGEM 800 HD XLT Computerized Schmidt-Cassegrain Telescope is a high end 8” Optical Tube Assembly mounted on a CGEM™ mount. Its optics are XLT coated giving you the brightest and sharpest images possible. The CGEM mount is designed for ease of control and quick, smooth adjustments. HD Optics and Imaging The brand new EdgeHD optical design is guaranteed to please the user. With the improved and advanced high definition optical system, astrophotographers are sure to love the quality that you receive even in wide field images. With the EdgeHD, you will experience little or no distortion to your images when coupling it with your favourite CCD or DSLR camera. Fastar Configuration Equipped with a removable secondary mirror on the optical tube, this additional feature allows for exposure times that are up to 25 times faster than normal, all the while still yielding a field of view that is five times wider than normal. To use this function, a third party lens assembly is required to take over and replace the secondary mirror. But this handy attribute lets the user capture wide field images in a small amount of time! Precise Alignments and Steady Mount All-Star polar alignment process allows the system to assist with alignment. The mount can also track objects well pass the Meridian for uninterrupted imaging through the most ideal part of the sky.


CGEM EdgeHD Optics Computerized Mount Features

Industry and Consumer proven NexStar computer control technology

Computer database of over 40,000 objects - Quick and accurate Polar alignment

Meridian preference for slewing

Solar System alignment method

Permanent Programmable Periodic Error Correction (PEC - Drive Motors

Low Cog DC Servo motor with integrated optical encoders offer smooth, quiet operation and long life. The motor armatures are skewed to minimize cogging which is required for low speed tracking

Internal Cable wiring for trouble-free setup and transportation

Autoguide port and Auxiliary ports located on the electronic plate for long exposure astrophotography

NexRemote telescope control software included

GPS compatible with optional SkySync GPS Accessory Celestron CGEM 800 HD XLT Computerized Schmidt

Cassegrain Telescope Features

8" EdgeHD Optics - CGEM Computerized Equatorial Mount

Celestron's premium StarBright XLT coatings

9x50 finderscope to help accurately find objects

Ultra sturdy 2" steel tripod with Accessory Tray

Star diagonal provides more comfortable viewing position when observing objects that are high in the sky


Celestron CGEM 800 EdgeHD Computerized Telescope








Optical Design


Aperture (mm)

203.2 mm (8 in)

Focal Length (mm)

2032 mm (80 in)

Focal Ratio


Eyepiece 1 (mm)

25 mm (0.98 in)

Magnification 1

81 x



Star Diagonal



Computerized Equatorial

Optical Tube



Adjustable, Stainless Steel

Power Supply

Car battery adapter

Highest Useful Magnification

480 x

Lowest Useful Magnification

29 x

Limiting Stellar Magnitude


Resolution (Rayleigh)

0.69 arc seconds

Resolution (Dawes)

0.57 arc seconds

Light Gathering Power

843 x

Angular Field of View (deg)

0.62 °

Secondary Mirror Obstruction

2.7 in (69 mm)

Secondary Mirror Obstruction by Diameter

34 %

Secondary Mirror Obstruction by Area

11 %

Optical Coatings

Starbright XLT Coating

Optical Tube Length

17 in (432 mm)

Telescope Weight

88 lbs (40 kg)


1 x 17 lbs

Motor Drive

Low cog DC Servo motors with encoders, both axes

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

24 bit, 0.08 calculation


Steel worm gear and 90 mm pitch diameter brass worm wheel

Computer Hand Control

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


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

Power Requirements

12 VDC 3.2 Amps


Optional SkySync GPS Accessory

Eyepiece 1 Field of View (deg)

.62 °


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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