Celestron CGX Equatorial 8" (800) EdgeHD Telescope

£3,999.00✓ 2 year warranty

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About this product

Model:  cel_cgx_800_edgehd_12055
Part Number:  12055-CGL

Celestron’s 8” EdgeHD telescope features Aplanatic Schmidt optics designed to produce aberration-free images across a wide visual and photographic field of view.

The optical system reduces more than just off-axis star coma, it also provides a high quality flat focal plane all the way to the edge of the field of view.

For eight years, Celestron’s workhorse CGEM mount lineup has been the German Equatorial backbone for telescopes ranging from 6 to 11 inches of aperture. Since that time, many more astro-imagers and planetarium controlled setups have emerged as backyard telescope technology has evolved. Celestron’s engineering team applied their years of experience designing German Equatorial mounts to the all-new CGX EQ, a culmination of all the advancements made to Celestron’s technologies, value, and ease-of-use.

The new CGX was designed to support your telescope for both visual and astro-imaging pursuits.  Key design goals included a lower profile EQ head for a more compact and therefore more stable setup; a better drive system; remote operation-friendly with home and limit optical sensors; easier polar alignment adjustments and better cable management. In addition, there are several mechanical and ergonomic improvements to make the mount sturdier, easier to use and transport. 

CGX Intro Video


 

GENERAL FEATURES

  • 8” HD optics
  • CGX EQ computerised equatorial mount
  • Celestron’s premium StarBright XLT coatings provide maximum light transmission
  • A 9x50 finderscope, 1.25” mirror diagonal for more comfortable viewing, and 1.25” 40 mm Plössl eyepiece are all included
  • Celestron’s premium StarBright XLT coatings provide maximum light transmission
  • Experience our best optical performance with EdgeHD’s flat-field and coma-free optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces
  • Aluminium optical tube with tube vents featuring an integrated 95-micron mesh filter allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging
  • Versatile design accommodates 2 focal ratios: native f/10 or ultra-fast f/2 imaging with a removable secondary mirror and third-party accessories

CGX MOUNT FEATURES

  • All-new design. Sturdier and more rigid with quicker dampening time
  • Increased load capacity to 55 lbs.
  • Improved motors provide more torque, better slewing and tracking under heavy loads
  • Heavy Duty belt-drive system minimises backlash while providing smooth motor operation under heavy loads
  • Spring-loaded brass worm wheel and stainless steel worm gear reduce friction and provide optimum gear mesh
  • Internal cabling for worry-free remote operation. Power input and accessory ports remain stationary while the mount slews to avoid snags
  • Internal hard stops for both axes prevents cable tension and tripod strike
  • Internal optical sensors on both axes for simple and safe remote operation
  • Home sensors allow the mount to always start in the index position regardless of orientation before a power reset
  • Limit sensors automatically shut off slewing or tracking before reaching the hard stop fail safe
  • Brand new control software developed in conjunction with PlaneWave Instruments for professional level control operation and imaging
  • Software includes multi-point mount modeling for extremely precise pointing accuracy and many more additional features for remote astroimaging
  • Wider tripod stance for improved stability
  • Adjustable EQ head position to optimize center of gravity over the tripod and fully utilize the increased 3º-65º latitude range
  • Dual-fit CG-5/Vixen and CGE/Losmandy dovetail saddle

IMPROVED TRIPOD FEATURES

  • 2" steel legs with height index marks for quick leveling
  • "Jack of all trays" can hold three 1.25" eyepieces, two 2" eyepieces, your smartphone, or other accessories
  • +20º of additional tracking past the meridian on either side
  • Tripod legs can be collapsed with accessory tray installed for faster setup and transport

CGX MOUNT ERGONOMICS

  • All-new ergonomically designed dovetail clamping knobs
  • Innovative and improved polar alignment adjustment system
  • All-new ergonomic latitude adjuster for smooth and easy adjustment under full loads
  • Optional add-on polar axis finderscope - coming soon

CGX MOUNT ELECTRONICS

  • All-new NexStar+ hand control with USB port
  • Two AUX accessory ports to support wireless/WiFi alignment and operation with StarSense AutoAlign and SkyPortal WiFi Module accessories (sold separately)
  • USB 2.0 port, used to connect directly to PC with included software
  • Autoguider port
  • PPEC ready
  • Threaded 12VDC power input barrel connector
  • Internal Real Time Clock (keeps time and site information saved)

What's in the box

  • Telescope OTA
  • 9x50 Finderscope
  • 1.25" Star Diagonal
  • 40mm Eyepiece
  • CGX Equatorial Head
  • CGX Tripod
  • Accessory Tray
  • 1x 7.7kg / 17lbs Counterweight
  • NexStar+ Hand Control
  • DC Power Cable (Cigar Plug)

Specifications

Optical DesignEdgeHD
Aperture (mm)203.2 mm (8 in)
Focal Length2032 mm (80 in)
Focal Ratio10
Focal Length of Eyepiece 1 (mm)40 mm (1.57 in)
Magnification of Eyepiece 151x
Finderscope9x50
Star Diagonal1.25
Optical TubeAluminum
Highest Useful Magnification480x
Lowest Useful Magnification29x
Limiting Stellar Magnitude14
Resolution (Rayleigh)0.69 arc seconds
Resolution (Dawes)0.57 arc seconds
Light Gathering Power (Compared to human eye)843x
Secondary Mirror Obstruction2.7 in (69 mm)
Secondary Mirror Obstruction by Diameter34%
Secondary Mirror Obstruction by Diameter11%
Optical CoatingsStarBright XLT
Optical Tube Length17 in (432 mm)
Optical Tube Weight14 lbs (6.3 kg)
Dovetail CompatibilityCGE Mount
MountGerman Equatorial
Instrument load capacity55lbs
Tripod height adjustment range47.25” to 77.5” including EQ head
Tripod leg diameter2"
Latitude adjustment range3º-65º
Tripod Weight19.2 lbs
EQ Head Weight44 lbs
Max Slew Speed5º/second (4º/second is default)
Tracking RatesSidereal, Solar and Lunar
Number of Auxiliary ports (for hand control and accessories)2
Autoguide portYes
USB PortYes
SoftwareNew telescope control PC software

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