Celestron EdgeHD 1100 OTA - 280 mm f/10 Flatfield SCT

Celestron 1100 EHD 11" Optical Tube Assembly

The 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.

The Celestron XLT multi-coating enhances constrast and brightness even further, for astrophotography as well as for observation. We recommend the EdgeHD for astrophotographers and for dedicated observers who want to use a large aperture as mobile unit.

With 12.7 kg tube weight, the EdgeHD 1100 can still be used mobile. It can be held by a Celestron CGEM mount or the CGEM-DX, even for astrophotography. However, the telescope also makes a good impression in compact obervatories.

The Celestron EdgeHD Telescope advantages:

Wide and fully corrected field for astro photography - flat and free of coma.

Unrestricted visual suitability

Primary mirror lock - prevents the mirror from shifting

Primary mirror ventilation for shorter cool-down time

Every HD telescope is Fastar compatible and can be turned into a f/2 Schmidt Camera.

With the StarBright XLT, Celestron disposes of one of the best coatings we know. Thus offering the HD telescopes a very bright and full-contrast picture.

Easy Collimation: guarantees ideal performance every time. Edge HD?s precision-machined mechanics and a spherical secondary mirror make collimation simple and accurate.

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with this telescope model: Link to Astrobin

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with this telescope model: Link to Astrobin

Image sequence by a customer

Our customer Dominique "Dodi" Dierick from Ghent (Belgium) has taken several images of Jupiter and combined them into one image. This shows the rotation nicely, whereby the movement of a bright disturbance in the lower dark band is particularly striking.

More important, however, is the outbreak in the NTrZ, the bright strip above the upper dark belt. This phenomenon occurs on average every five years and is visible as a bright spot. Here also a bright area in the belt is visible below it:

Object: Jupiter

Photographer: Dominique "Dodi" Dierick from Ghent (Belgium)
Telescope: Celestron EdgeHD 1100 (EHD11-OTA)
Focal extender: TeleVue Powermate 2.5x Barlow lens (PMT2513)
Camera: Player One Uranus-C
Mount: 10Micron GM 2000 HPS (current version: BA1452030)

We congratulate Dominique Dierick on these fascinating pictures!

Two images of Jupiter taken by another customer

Our customer Torsten Großmann from Nuthe-Urstromtal (Germany) took several thousand frames of Jupiter two times in January 2026 and stacked them into one image each time - once with the Great Red Spot and once without:

Object: Jupiter with the Great Red Spot

Photographer: Torsten Großmann from Nuthe-Urstromtal (Germany)
Telescope: Celestron EdgeHD 1100 (EHD11-OTA)
Camera: ZWO ASI662MC
Stacking: 6000 frames


Object: Jupiter, side without GRS

Photographer: Torsten Großmann from Nuthe-Urstromtal (Germany)
Telescope: Celestron EdgeHD 1100 (EHD11-OTA)
Camera: ZWO ASI662MC
Stacking: 12000 frames

We congratulate Torsten Großmann on these great pictures!

Safety informations: PDF Download