Delta Rho 280 Argus telescope f/2.75

With the DeltaRho 280, we are introducing a groundbreaking telescope. Based on the proven DeltaRho technology, the DR280 delivers fast wide-field imaging in a compact carbon-fiber design.

Built for Wide-Field Sky Coverage

DR280 is designed for fast, wide-field image capture. Its 280 mm aperture provides significant light-gathering capability, while the f/2.75 focal ratio enables efficient imaging across large areas of the sky. With a 55 mm image circle and more than 4 degrees of field of view, DR280 is built for applications where speed and coverage are essential, from deep-sky imaging to large-scale survey work.

Carbon Fiber Structure

The carbon fiber optical tube provides a rigid, lightweight structure designed to maintain stability through changing environmental conditions. For fast optical systems, mechanical precision is critical. DR280 is engineered to keep the optical path stable and support consistent imaging performance across the full field.

Integrated Dew Control

DR280 includes integrated dew control to help protect optical surfaces from condensation during long observing sessions. Built-in heater technology helps maintain clarity and reduce interruptions caused by changing temperature and humidity conditions.

Low-Profile Focuser

The low-profile focuser provides 0.5 inches of travel and allows 4.25 inches of back focus from the back of the racked-in focuser. This gives users the spacing needed to support camera integration while maintaining a compact mechanical profile.

Collimation Software

DR280 is equipped with user-friendly collimation software designed to help users align the optical system quickly and accurately. This is critical for maintaining the resolution, sharpness, and field performance required for professional imaging and research.

Key Features at a Glance

• DeltaRho 280 mm with 11" aperture
• 770.6 mm focal length
• Fast f/2.75 focal ratio
• 55 mm image circle
• More than 4° field of view with a Sony IMX461 sensor (55 mm sensor diagonal)
• 163 mm (6.4 in) back focus from mounting surface
• 467 mm (18.375 in) total OTA length including fouser
• Carbon fiber optical tube
• Integrated dew control
• Low-profile focuser with 12.7 mm (0.5") in travel
• Built-in tip-tilt focal plane adjustment
• Requires shipping crate #1323512 (shipping crate sold separately) Compatible with the L350 Direct Drive Mount
• Requires a crating #1323512. The crating will be charged extra
• Compatible with the L-350 Direct Drive Mount, creating a high-performance imaging system for observatory-class applications.
• User-friendly collimation software