Celestron Schmidt-Cassegrain telescope EdgeHD-SC 280/2800 AVX GoTo (44838)

The 1100HD system combines Celestron’s Advanced VX computerized equatorial mount with EdgeHD optics, offering a powerful solution for both visual observation and astrophotography. With its large 280 mm aperture and StarBright XLT coatings, this telescope gathers over 1600 times more light than the naked eye, delivering bright and sharp images. The EdgeHD optical system ensures distortion-free, pin-sharp stars across the entire field of view, making it perfect for astrophotography, even with large camera sensors.

EdgeHD telescopes are true astrographs, correcting not only coma but also field curvature, providing sharp stars right to the edge of the image. This eliminates the “doughnut” effect often seen in other systems when using large sensors. The XLT multi-coating enhances light transmission, improving performance compared to similar systems on the market.

The EdgeHD design also includes advanced mechanical features:

• Mirror clamps securely hold the primary mirror in place without stressing optical elements, ensuring image stability during long exposures.

• Air vents behind the primary mirror allow rapid cooling of the optics while preventing dust from entering the tube.

The Advanced VX mount is an excellent choice for mobile astrophotography with small to medium-sized telescopes. It features periodic error correction (PEC) for precise tracking during long exposures and allows uninterrupted tracking of objects across the meridian. With high-torque servomotors and a load capacity of 14 kg, this mount is ideal for advanced users seeking portability and precision.

Specifications

Optics

• Type: Reflector

• Type of build: EdgeHD-Cassegrain

• Aperture (mm): 280

• Focal length (mm): 2800

• Aperture ratio (f/): 10

• Resolving capacity (arcseconds): 0.41

• Limit magnitude: 14

• Light gathering capacity: 1600x compared to the human eye

• Max. useful magnification: 560x

• Tube weight (kg): 12.7

• Tube material: Aluminum

• Tube length (mm): 610

• Coating: StarBright XLT

Reflector Details

• Secondary mirror obstruction (%): 34%

• Ventilation for central mirror: Yes

Focuser

• Type of build: SC thread

• Connection to eyepiece: 2" (1.25" adapter included)

Mount Specifications

• Mounting type: Equatorial (AVX)

• GoTo control: Yes

• Motors: Servomotors with encoders

• Load capacity (kg): 14 kg

• Polar elevation setting (°): 7 - 77°

GoTo Control Features

• Database entries: 40,000 objects

• Alignment methods: Quick Align, Solar System Align, 2-Star Align, etc.

Tracking Features and Interfaces:

• PEC correction: Yes

• Tracking speeds: Sidereal, solar, lunar modes available

Tripod Specifications:

• Material: Steel tripod legs with adjustable height from 112 cm to 163 cm

Included Accessories:

• Finder scope (9x50)

• Eyepiece (16 mm, 2")

• Star diagonal (2", 90°)

• Counterweights (3 x 5 kg)

General Information:

• Total weight of the system (kg): 38 kg

• Suitable for observing the Moon, planets, nebulae, galaxies, and astrophotography

• Not suitable for solar observation without an appropriate solar filter

• Recommended for advanced users