Celestron SKU: 12055 | Helix SKU: CT12055
COMPUTERIZED MOUNT FEATURES
IMPROVED TRIPOD INCLUDES:
CGX 800 HD combines Celestron's all-new state of the art CGX computerized equatorial mount with its acclaimed EdgeHD optical system. With 8 inches of aperture and our premium StarBright XLT coatings, the CGX 800 HD gives you over 800 times the light gathering power than the unaided eye and is the lightest and most portable telescope in its class.
SEE THE UNIVERSE IN HD
EdgeHD is an aplanatic, flat field Schmidt-Cassegrain telescope that produces aberration-free images across a wide visual and photographic field of view. The optical system was designed to reduce more than just off-axis star coma; it also provides an astrograph-quality flat focal plane all the way to the edge of the field of view.
TRUE ASTROGRAPH QUALITY
Many optical designs that advertise themselves as "astrographs" actually only produce pinpoint stars across a curved focal plane. While this may be acceptable for some visual observing, stars will appear out of focus at the edge when used with the flat chip sensor of a digital camera. EdgeHD optics produce a focal plane more than three-times flatter than a standard Schmidt-Cassegrain telescope and dramatically flatter than competing coma-free designs. This guarantees you visibly sharp stars across some of the largest CCD chips available today.
Superior edge performance not only creates rounder, more pleasing stars, but actually improves the resolution and limiting magnitude when compared to telescopes of equal aperture. With Celestron’s StarBright XLT optical coatings on every surface, EdgeHD optics gives you maximum light throughput across the widest visual and photographic spectrum.
In addition to EdgeHD’s optimized optical design, the telescope tube has been redesigned to make sure you get the most from your optics each and every night.
Every EdgeHD that ships has been tested not only for the surface quality of each optical component, but also with a camera and artificial star to ensure the imaging system meets our rigid quality assurance. This “final acceptance test” confirms the EdgeHD will perform in the field and deliver high-quality astroimages.
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 our technologies, value, and ease-of-use.
The new CGX was designed to better support your telescope for both visual and astro-imaging pursuits. Key design goals included a lower profile EQ head, which provides 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 to that, we’ve made mechanical and ergonomic improvements throughout to make the mount sturdier, easier to use, and transport. The CGX is our new Equatorial backbone to support a wide range of telescopes.
|Optical Tube Info:|
|Aperture (mm)||203.2 mm (8 in)|
|Focal Length||2032 mm (80 in)|
|Focal Length of Eyepiece 1 (mm)||40 mm (1.57 in)|
|Magnification of Eyepiece 1||51x|
|Highest Useful Magnification||480x|
|Lowest Useful Magnification||29x|
|Limiting Stellar Magnitude||14|
|Resolution (Rayleigh)||0.69 arc seconds|
|Resolution (Dawes)||0.57 arc seconds|
|Light Gathering Power (Compared to human eye)||843x|
|Secondary Mirror Obstruction||2.7 in (69 mm)|
|Secondary Mirror Obstruction by Diameter||34%|
|Secondary Mirror Obstruction by Diameter||11%|
|Optical Coatings||StarBright XLT|
|Optical Tube Length||17 in (432 mm)|
|Optical Tube Weight||14 lbs (6.3 kg)|
|Dovetail Compatibility||CGE Mount|
|Mount||German Equatorial Mount|
|Instrument load capacity||55lbs|
|Tripod height adjustment range||47.25” to 77.5” including EQ headA|
|Tripod leg diameter||2"|
|Latitude adjustment range||3º-65º|
|Tripod Weight||19.2 lbs|
|EQ Head Weight||44 lbs|
|Max Slew Speed||5º/second (4º/second is default)|
|Tracking Rates||Sidereal, Solar and Lunar|
|Number of Auxiliary ports (for hand control and accessories)||2|
|Software||New telescope control PC software|
|CGX Equatorial Head|
|2 x 11 lbs counterweight|
|NexStar+ Hand Control|
|DC Power Cable (plugs into cigarette lighter socket)|