Celestron CGX 800

Rowe-Ackermann Schmidt Astrograph Telescope

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  • Technical Features

Technical Features for Celestron CGX 800

The Celestron RASA CGX 800 is a 8-inch Rowe-Ackermann Schmidt astrograph telescope that has flat field free of optical aberrations like coma, field curvature and astigmatism. It features fast, wide-field f/2 system with 2 advantages, better apparent tracking and shorter exposures. The 22 mm optimized image circle maintains pinpoint stars to the far corners of even the largest astroimaging sensors, while the usable field extends even further to 32 mm for larger format sensors.

The Celestron RASA CGX 800 has custom engineered linear brass focuser bearing that reduces image shift. With optical limit switches, home sensors, through-mount cabling, and hard stops, this system is fully capable of Remote Imaging. The improved StarBright XLT multi-coating system, which includes anti-reflection coatings on the lenses and highly reflective coatings on the mirrors, increases light transmission throughout the entire optical path.
Factory Information:
Quick Start Guide Quick Start Guide

RASA CGX 800 Features:

  • 8 Inch Aperture (203 mm )
  • Focal Ratio F/2 Optical Design
  • Ultra-Stable Focus System
  • 843x Light Gathering Power
  • StarBright XLT Optical Coating
  • NexStar+ Hand Control
  • CGX Tripod


Optical Design:Rowe-Ackermann Schmidt Astrograph
Aperture:203mm (8")
Focal Length:400mm (15.74")
Focal Ratio:f/2.0
Central Obstruction Diameter:93mm (3.66")
Light Gathering Power (Compared to human eye):843x
Resolution (Rayleigh):0.68 arc seconds
Resolution (Dawes):0.57 arc seconds
Image Circle:22mm (.86") Ø
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") off-axis
Optical Window:46mm (1.81") Ø
Back focus with included camera adapter:25mm (.98")
Back focus from top of threaded collar:29mm (1.14")
Optical Tube:Aluminum
Optical Tube Length:628mm (24.7")
Optical Tube Diameter:235mm (9.3")
Focuser:Ultra-Stable Focusing System
Optical Tube Weight:17 lbs (7.7 kg)
Other Features:Air-cooling System, Integrated Filter Mount
Included items:M42 Camera Adapter, C-thread Camera Adapter, Fan bBattery Pack
Dovetail:CGE Dovetail Bar
Mount Type:Computerized Equatorial
Height Adjustment Range:1200.15mm - 1968.5mm (47.25" - 77.5")
Tripod Leg Diameter:50.8mm (2")
Latitude Adjustment Range:3° - 65°
Mount Head Weight:44 lbs (20 kg)
Tripod Weight:19.2 lbs (8.7 kg)
Slew Speeds:9 slew speeds - max speed 4°/second
Tracking Rates:Sidereal, Solar and Lunar
Tracking Modes:EQ North & EQ South
Dovetail Compatibility:Dual saddle plates (Vixen and CGE saddle)
Number of Auxiliary ports:2 Aux ports
Autoguide port:Yes
USB Port:Yes, input for Mount and Hand Control
Power Requirements:12V DC, 4 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:PWI Telescope Control Software, Celestron's Starry Night Special Edition Software, SkyPortal App
Total Kit Weight:124.2 lbs (56.3 kg)

Celestron RASA CGX 800 Includes:
  • CGX Equatorial Head
  • CGX Tripod
  • Accessory Tray
  • 2 x 11 lbs Counterweights
  • NexStar+ Hand Control
  • 8mm Allen Wrench
  • 12V DC Power Cable
  • Hand Control Holster
The Celestron CGX 800 Rasa Telescope has many exciting features for users of all types. It's one of FactoryOutletStore's best selling . See the Celestron CGX 800 Rasa Telescope product video above for more details. FactoryOutletStore stocks a full line of accessories like Camera Adapter for the Celestron CGX 800 Rasa Telescope. The Celestron CGX 800 Rasa Telescope is sold as a Brand New Unopened Item.