Schmidt-Cassegrain teleskoop SC 279/2800 EdgeHD 1100 CGX-L GoTo

The Celestron EdgeHD telescope: Corrected image - sharp right up to the edges!

EdgeHD is the name for Celestron”s “aplanatic Schmidt Cassegrain telescope”. After over 50 years of success, Celestron has revolutionised the classic Schmidt Cassegrain telescope.

EdgeHD telescopes ( "Edge High Definition") are true astrographs. This optical system delivers distortion-free, sharp images right to the edge of the visual field. This means that not only the coma outwith the optical axis is corrected, as is the case in currently available “coma-free” lens designs, but also field curvature.

Lots of optical systems are advertised as “astrographs”. As desired, they display stars with pin-sharp clarity, but along a curved image plane. Photographing this using a camera results in a noticeable image field curvature which rises towards the edge of the image field, resulting in increasing star size and aberations with larger sensors. The stars at the edge expand into small rings (“doughnuts”). As well as the coma, the Celestron Edge HD telescopes correct field curvature right up to the edge of the image. This also significantly improves resolution and magnitude limits in comparison to rival optical systems.

The XLT multi-coating helps to give the EdgeHD scopes a significant performance boost compared to similar systems on the market.

The Edge HD telescopes” mechanisms and lens tube have been fully overhauled:

mirror clamps hold the primary mirror securely in any desired position without putting pressure on the optical elements. The image is stable, even during long exposure times.

Air vents behind the primary mirror provide fast air exchange so that the lens cools amazingly quickly. Thanks to an air filter system, dust is prevented from entering the lens tube.

CGX-L mount - the L stands for Large, because the CGX-L is the big sister of the Celestron Mount CGX GoTo.

The load capacity has been increased from 25 kilograms to 34 kilograms as compared to the CGX. This means that the CGX-L can also carry the largest Celestron OTAs plus photographic accessories. A key role is played by the generously dimensioned 144mm worm gears, which allow smoother operation even with heavier telescopes, as well as the 270mm extended dovetail clamp, which holds even the larger telescopes securely.

Despite the higher load capacity, the CGX-L is an easy to transport mount for portable use. It comes with an excellent tripod for this purpose.

However, the CGX-L is also very well suited for smaller observatories and remote operation. You get a really versatile mount with the CGX-L!

Advantages of the CGX-L in a nutshell

Increased payload carrying capacity with a still outstanding weight-load ratio;

Additional AUX sockets and auto-guider connection on the DEC axis for better cable management:

• 144mm worm gears;

• 270mm long dovetail clamp;

• steel tripod with 70mm width legs;

• counterweight rod with 31.5mm diameter for heavy loads;

Please also read the product description of its little sister - the CGX mount. Apart from the above improvements, the CGX-L has the same technical features.

CGX Equatorial Mount and Tripod:

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 our technologies, value, and ease-of-use.

All-new design:

Sturdier and more rigid with quicker dampening time

Improved motors provide more torque, better slewing and tracking under heavy loads

Heavy Duty belt-drive system minimizes 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

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

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

New improved tripod:

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

Tripod legs can be collapsed with accessory tray installed for faster setup and transport

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)

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.

Control software from PlaneWave Instruments for Celestron's CGX and CGX-L mounts:

PWI Telescope Control opens up the full precision of these mounts. A USB connection from the mount to your PC means the Sky Viewer display makes it easy to find targets. Or you can search for your targets in the extensive object database. PWI also has a connection to the SIMBAD astronomical online database for even more astronomical objects.

PWI uses PointXP Mount Modelling - providing numerous reference stars for the highest accuracy possible. PointXP (also used in the StarSense AutoAlign module) offers more accuracy than a classic hand control box. By using numerous reference stars, PWI can accommodate multiple alignment errors, including device deflection - as a result, GoTo accuracy is increased.

Features of PWI software

PointXP Mount Modelling, accepts as many reference stars as you want.

developed by Celestron in partnership with PlaneWave Instruments

future updates will include additional features and enhancements

Sky Viewer Star chart for easy location of astronomical objects

extensive object database, including online database.

The software runs on Windows 7, 8 and 10. You can download it via the Downloads tab. You will also find an English-language manual in PDF format available there.