This telescope is checked, measured and adjusted if necessary before delivery. The focuser is set. Upon request, you will receive a meaningful quality certificate from your telescope (test report with star test, Ronchi, adjustment, with individual serial number) included! Please specify with order!

Examples of our test protocols: test recordings
How we adjust: About us

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Celestron CGEM 800 HD - 203 / 2000mm Flatfield GoTo telescope with mount

Celestron CGEM 800 HD - 203mm aperture 2032mm focal length - corrected image field for astrophotography
... complete telescope on powerful GoTo mount CGEM


Celestron EdgeHD are aplanatic Schmidt telescopes produced for a flawless and flattened large field of view for astrophotography. Each Celestron HD Telescope offers a comfree and fully corrected image field for astrophotography and, of course, for observation. The HD Schmidt telescopes are the latest development from Celestron, based on years of experience in building high quality Schmidt Cassegrains.

The Benefits of Celestron EdgeHD Schmidt Telescopes:

- large and completely corrected image field for astrophotography - even and coma free
- Unrestricted visual fitness
- Fixation of the main mirror - prevents the mirror from shifting during the exposure
- Main mirror ventilation for faster cooling
- Each HD Schmidt Telescope is Fastar compatible and can be converted into a Schmidt Camera

Learn more about the EdgeHD:

Celestron HD Fastar Especially bright picture:

Celestron has one of the best rewards we have with the StarBright XLT Compensation. Thus, the HD telescopes offer a particularly bright and high-contrast image.

Fastar compatible:

Convert the HD telescope into a f / 2 CCD Schmidt camera with just a few clicks with the HyperStar Upgrade. The HyperStar Kit is linked in the section "Recommended Accessories".

Powerful 9x50 viewfinder:

Each HD telescope comes with a good multivergüteten 9x50 viewfinder, which makes finding objects easier.
Celestron HD Ventilation Innovative 1.25 "Clamping:

The accessories are fixed by a sturdy 1.25 "clamp, which is clamped evenly over the entire surface.

New elegant design:

Not only technically, but also in design Celestron sets new standards with the HD Schmidt Telescopes.
Information about the Celestron CGEM - parallactic mount with computer control - up to 20kg instrument weight
... massive GoTo mount for devices up to 11 "aperture - well suited for astrophotography.


The CGEM mount from Celestron offers, in addition to an attractive design, also good inner values. The mount closes the gap between the proven Advanced GoTo mount (CAM) and the massive CGE. The CGEM can be loaded with equipment, up to about 20kg dead weight, depending on the application and lever.

Built-in tracking with automatic object positioning ... The CGEM comes with a complete GoTo control with approximately 40,000 stored objects and a clean working tracking.

Especially massive pole height ... Large knurled screws in azimuth and height allow easy adjustment of the mount, even at full load. The pole height is particularly solid and gives the mount a higher stability.

Innovative arrangement for astrophotography ... The CGEM has a particularly effective one-nosing procedure (All Star - patent pending). For a precise arrangement it is sufficient, after the calibration of the computer, simply to approach a bright star. The software then calculates the deviation from the optimal arrangement and then tells how far the mount in the azimuth and in the pole height still needs to be corrected. A Polsucher is no longer necessary.

Permanent electronic correction of the screw error ... Also very important for astrophotography - the permanent correction of the periodic error. The mount remembers the correction. The tracking becomes more accurate. Thus, the mount is particularly well suited for astrophotography.

The mount goes beyond the meridian ... Especially useful when taking long-exposure astro-shots while the object passes the meridian. The exposure can be continued. The mechanics of the mount allows a tracking far beyond the meridian passage, without swinging.

Stable 3 "prism clamp ... The CGEM already has the same massive 3" prism clamp as the Celestron CGE or Losmandy mounts. The 3 "clamp allows the use of sturdy, large prism rails, resulting in less vibration and more rigidity in the overall system.

Solid stainless steel tripod ... The height-adjustable stainless steel tripod is extendable to 140cm height. The stability is fully maintained. The wide adjustment range always brings the mount to the correct working height, depending on the instrument type.

The computer control:

- Database of over 40,000 objects - 400 user-defined objects - over 200 objects with extended information
- proven NexStar technology
- Upgradeable software over the Internet
- New innovative All-star Polar Alignment - perfect placement in minutes
- Five alignment possibilities - from the 1-star calibration to highly accurate calibration with any number of stars
- Permanent programmable error correction of the periodic error of the RA screw
- Worm wheel (90mm diameter) made of brass - screw made of steel
- Servo motors with quiet operating noise
- Internal cables - only one connection to the controller
- Autoguiderport - ST4 compatible / RS 232 port
- Includes NexRemote software - for controlling the mount via the computer
- GPS compatible


Specifications of the 800 HD:

- Opening ... 203mm
- Focal length ... 2032mm
- aperture ratio ... f / 10
- Maximum meaningful magnification ... 480x
- limit size ... 14m0
- Resolution ... 0.57 "
- Shading by the secondary mirror ... 68,5mm (33,8%)
- tube length ... 431mm

Scope of delivery of the 800 HD:

- optical tube
- 9x50 viewfinder
- 2 "zenith mirror
- 40mm 1.25 "eyepiece

The mount and the scope of delivery:

- Parallactic mount with instruments up to 20kg loadable
- Mount weight ... 18.6kg
- Tripod weight ... 7,7kg
- 9 adjustment speeds (5 ° / sec, 2 ° / sec, 1 ° / sec, 64x, 16x, 8x, 4x, 1x, 0.5x)
- Tracking speeds - Siderial, Solar and Lunar
- Changeover north / south
- Power supply - 12V / 1.5 amp - cigarettes lighter cable included
- A counterweight with about 5kg is included in the basic equipment
- Permanent correction of the tracking error (NexRemote software)
- RS232 cable