Celestron CGEM II 800 Edge HD 8 "Telescope

The Celestron CGEMII Edge HD 8 " Telescope is a computerized telescope with the new CGEM II mount and 8" Edge HD optical tube with fully aplanatic optics. This telescope is shaping up to be the ideal tool for the astrophotographer .
The 8 "aperture, 203mm , is considered as a first option to start observing the maximum detail of the deep sky and also of planets. The power of light collection is 800 times higher than that of the human eye, in a high equipment range and the lightest on the market.Their focal length is 2032mm and the focal ratio is 1/10 , and a reduction of f / 7 can be obtained with a focal reducer .
Celestron's aplanatic Edge HD optics ensure a flat field of view without aberration. Star Bright XLT coatings provide you with maximum sharpness, contrast and image definition for absolutely clear viewing and a photographic plane without aberrations . This sharpness and focus of the image is preserved to the edge of the optics or plane, all of them comma-free , and allows observation and photography without losing any detail, even in the weakest stars close to the meridian.
The optical tube , entirely made of high quality aluminum, has a weight of 6.35kg , incorporates a 40mm focal length 51X eyepiece and a 9x50mm finder. In its rear part it has grooves that work as a vent and refrigerator, for the release of air behind the primary mirror, without letting dust enter the optical tube. The mirrors have a very stable support, which reduces any movement or displacement of the image during obtaining and processing.
Flexible clutches hold the mirror in place and reduce image movement when taking long-exposure photos. Once in focus, the flexible rods allow the mirror to stay in place without adding force or pressure to the mirror assembly, keeping the image centered on the eyepiece (or sensor).
The frame coupling structure is the dovetail CGE.
The Celestron CGEM II mount is the evolution of the original CGEM, an equipment designed to support optical tubes up to 11 ", guaranteeing efficient and vibration-free tracking.
Its load capacity is up to 18kg (40lb) and includes a steel tripod with graduation to facilitate quick leveling. The thickness of the legs, 2 "guarantee maximum stability to the equipment, once assembled and ready for observation.
The innovation and evolution of this frame rests first of all on the great improvement of its design , more ergonomic, with buttons for adjusting the altitude and alzimuth, large and very manageable, capable of achieving rapid and precise alignment and orientation. Internal wiring provides a much cleaner and more practical appearance. It includes mechanical improvements also in the clutch levers, longer to facilitate tightening and loosening, as well as improvements in gears and ball bearings. All this to guarantee a finer and more precise follow-up .
The next stage of evolution of this mount is the ALL-STAR alignment procedure, with it you can align the team with any star in the sky. The permanent correction of the periodic error , is one of the most appreciated characteristics by astrophotographers , it is the key for the monitoring to guarantee the best possible captures. Another great advantage for astrophotographers is that tracking beyond the meridian ensures uninterrupted imaging at those points just near the meridian .
The mount's database has more than 40,000 objects , of which 100 can be programmed by the user and 200 present updated and improved information.
Characteristics:
Optical tube:

• Optical Design: EdgeHD
  
• Opening (mm): 203.2 mm (8 inches)
  
• Focal length: 2032 mm (80 inches)
  
• Focal ratio: 1/10
  
• Eyepiece focal length (mm): 40 mm (1.57 in)
  
• Eyepiece magnification: 51 x
  
• Seeker: 9x50
  
• Diagonal: 1.25
  
• Aluminum Optical Tube
  
• Highest Useful Magnification: 480 x
  
• Lowest useful magnification: 29 x
  
• Limit of stellar magnitude: 14
  
• Resolution (Rayleigh): 0.69 arc seconds
  
• Resolution (Dawes): 0.57 arcseconds
  
• Light gathering power: (compared to human eye) 843 x
  
• Secondary mirror obstruction: 69mm
  
• Secondary mirror obstruction by diameter: 34%
  
• Secondary mirror obstruction by area: 11%
  
• StarBright XLT Optical Coatings
  
• Optical tube length: 432mm
  
• Optical tube weight: 6.35 kg
  
• CGE Mount Dovetail Compatibility
  

Mount

• Mount Type: German equatorial
  
• Tripod: Steel tripod with 2 "legs with graduated markings on bottom section for quick leveling
  
• Double dovetail socket - connects directly to Vixen / CG-5 and Losmandy / CGE dovetails
  
• Payload capacity: 40kg
  
• Latitude range: 15º - 70º
  
• Power requirements: 12 VDC, 3.2 amps
  
• Ports: 1x control knob port, 1x auxiliary port, 1x automatic guidance port, 1 USB 2.0 port (on the control stick) for direct link to a PC via ASCOM software.
  
• Drive motor: small diameter DC servo motors
  
• Spin Speeds: 9 Speeds
  
• Tracking Speeds: Sidereal, Solar and Lunar
  
• Tracking modes: EQ North and EQ South
  
• Alignment Procedures: AutoAlign, 2-Star Alignment, Quick Alignment, 1-Star Alignment, Last Alignment, Alignment with the Solar System
  
• Dual Line Computer Control Knob, 16 Character Liquid Crystal Display; 19 LED buttons with fiber optic backlight, USB 2.0 port for PC connection
  
• Nexremote Software
  
• Database: 40,000+ objects, 100 user-defined objects. Improved information on more than 200 objects
  
• Frame weight: 18 kg
  
• Tripod weight: 9kg
  
• Counterweight weight: 8kg
  
• Total frame weight: 37 kg