Celestron EdgeHD 11" Optical Tube Assembly (CGE Dovetail)

Celestron EdgeHD 11" Optical Tube Assembly (CGE Dovetail)

View the Universe in High Definition

EdgeHD is an advanced aplanatic, flat-field Schmidt-Cassegrain telescope engineered to deliver distortion-free images across an expansive visual and photographic field of view. This optical system was specifically designed to eliminate more than just off-axis coma; it also ensures an astrograph-quality flat focal plane that remains sharp right to the edge of the frame.

Genuine Astrograph Precision

Many telescope designs promoted as “astrographs” only deliver sharp stars across a curved focal surface. While this might be acceptable for some types of visual observing, it causes stars at the edges to blur when paired with the flat sensor of a digital camera. EdgeHD optics create a focal plane over three times flatter than a standard Schmidt-Cassegrain, and far flatter than competing coma-free models. The result: tack-sharp stars across even the largest CCD sensors in use today.

Enhanced Optical Performance

Edge-to-edge clarity not only produces rounder, more visually pleasing stars, but also boosts both resolution and limiting magnitude compared with telescopes of similar aperture. Thanks to Celestron’s StarBright XLT coatings applied to every optical surface, the EdgeHD system delivers maximum light transmission across the full visual and photographic spectrum.

Advanced Mechanical Innovations

Beyond its optimized optics, the EdgeHD optical tube has been re-engineered to ensure peak performance during every observing session.

   ➜  Mirror clutches – Adjustable tension clutches stabilize the mirror to reduce image drift during long exposures. Once locked, the flexible rods hold the mirror without stressing the assembly, ensuring the image stays centered on the eyepiece or sensor.

   ➜  Tube vents – Rear-cell cooling vents let warm air escape from behind the primary mirror. Each vent includes a built-in 50-mesh filter that allows airflow but blocks dust particles.

   ➜  Fastar compatibility – EdgeHD provides unmatched imaging flexibility. At its standard f/10, it’s capable of capturing fine detail in small deep-sky objects. By adding a size-specific reducer lens, you can expand your field of view without sacrificing sharpness. A Barlow lens increases magnification for planetary, lunar, or solar imaging. Every EdgeHD is also Fastar-ready, enabling the secondary mirror to be replaced with a third-party lens for ultra-fast f/2 wide-field imaging.

Individually Verified Quality

Every EdgeHD telescope undergoes rigorous testing-both for the precision of each optical component and as a complete imaging system using an artificial star and camera. This final acceptance test ensures that every unit meets strict performance standards and is ready to deliver outstanding astrophotography results right out in the field.