Celestron CGEM II 800

Rasa Telescope

Availability: In Stock

Brand New Includes Limited Lifetime Warranty
Returnable Item: 30 Day Guarantee i
30-Day Return Guarantee
If for any reason you are not satisfied with this product, your purchase is covered by our 30-day return policy. All contents and original packaging must be included with all returns. See all terms/conditions & restocking fee.
Ships free

  • Technical Features

Technical Features for Celestron CGEM II 800

The Celestron CGEM II 800 is a 8-inch RASA (Rowe-Ackermann Schmidt Astrograph) telescope with premium StarBright XLT coatings that make sures of the maximum light transmission with high-performance stainless steel worm gears and motors for accurate slewing & tracking. It has Ultra-Stable Focus System which minimizes unwanted lateral movement of the primary mirror when focusing or slewing the astrograph. This telescope can take advantage of Built-in Polar Alignment and a dedicated autoguider port for making corrections when astroimaging.

The Celestron CGEM II 800 RASA features NexStar+ hand control that offers multiple language programming. The improved motor offer high torque and can handle slight load imbalances with ease. It's lightweight materials and compact design of this telescope ensure stability and durability.
Factory Information:
Quick Start Guide Quick Start Guide

CGEM II 800 RASA Features:

  • 8 Inch Aperture (203mm)
  • Computerized With 40,000 Accessible Objects
  • Ultra-Stable Focus System
  • Computerized Hand Control
  • Focal Length: 2700mm, f/2.0 Focal Ratio
  • StarBright XLT Coating
  • 1 AUX Communication Ports
  • Built-in Polar Alignment
    - Allows To Align On Any Star in Sky
    - Making Fast & Easy Alignment Process
  • 2" Steel Tripod
  • CGEM II Computerized Equatorial Mount


Optical Design:Rowe-Ackermann Schmidt Astrograph
Aperture (mm):203mm (8 in)
Focal Length:400mm (15.74 in)
Focal Ratio:2.0
Central Obstruction Diameter:93mm (3.66 in) (46% of aperture diameter)
Light Gathering Power (Compared to human eye):843 x
Resolution (Rayleigh):0.68 arc seconds
Resolution (Dawes):0.57 arc seconds
Image Circle:22mm (0.86 in) Ø, 3.15°
Useable field:32mm (1.26") Ø, 4.6°
Wavelength range:390 - 800 nm
Spot size:< 4.6 µm RMS across image circle
Optical Coatings:StarBright XLT
Off-axis Illumination:93% at 11mm (.43 in) off-axis
Optical Window:46mm (1.81") Ø
Back focus with included camera adapter:25mm (.98 in)
Back focus from top of threaded collar:29mm (1.14 in)
Optical Tube:Aluminium
Optical Tube Length:24.7 in (628 mm)
Optical Tube Weight:17 lbs (7.7 kg)
Focuser:Ultra-Stable Focusing System
Dovetail Compatibility:CGE Mount
Mount Type:Computerized Equatorial
Tripod:2” Steel Tripod With Graduated Markings on Lower Section
Dovetail Mount:Directly Connects to both CG-5 & CGE Dovetail Bars
Payload Capacity:40 lbs
Latitude Range:15º – 70º
Power Requirements:12 VDC, 3.2 amps
Ports:1x Hand control port, 1x Auxiliary Port, 1x Auto guider port, 1 USB 2.0 port (on hand control)
Motor Drive:Low Cog DC Servo Motors
Slew Speeds:9 Slew Speeds
Tracking Rates:Sidereal, Solar and Lunar
Tracking Modes:EQ North and EQ South
Alignment Procedures:AutoAlign, 2-Star Align, Quick Align, 1-Star Align, Last Alignment, Solar System Align
Computerized Hand Control:Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons, USB 2.0 port for PC connection
Database:40,000+ objects, 100 User Defined Programmable Objects. Enhanced Information on Over 200 Objects
Mount Weight:40 lbs
Tripod Weight:20 lbs
Weight of Counterweight:1 x 17 lbs
Total Weight of Mount Kit:77 lbs

  • CGEM II Equatorial Head
  • Tripod
  • Accessory Tray
  • 1 x 17 lbs counterweight
  • NexStar+ Hand Control
  • DC Power Cable
  • Hand Control Holster
The Celestron CGEM II 800 Rasa Telescope has many exciting features for users of all types. It's one of FactoryOutletStore's best selling . The Celestron CGEM II 800 Rasa Telescope is sold as a Brand New Unopened Item.