Celestron S 279/620 RASA 1100 V2 Astrograph OTA

Description

Large-sensor imaging begins with the Celestron S 279/620 RASA 1100 V2 Astrograph OTA, an 11-inch Rowe-Ackermann Schmidt Astrograph with a 620 mm focal length and listed f/2.2 optical ratio. This standalone optical tube uses StarBright XLT coatings, an Ultra-Stable Focus System, integrated ventilation, dual full-length dovetail bars, camera adapters, fan battery pack, and a 43.3 mm optimized image circle for compatible large-format imaging sensors.

The RASA 11 V2 is a dedicated astrograph rather than a visual telescope, so a compatible mount, imaging camera, filters, power source, and software must be selected separately. The verified manufacturer configuration supports large CCD and DSLR-class imaging systems, with a broad imaging field and short focal length intended for wide-field deep-sky capture while final results depend on the complete camera and tracking workflow.

Key Features of Celestron S 279/620 RASA 1100 V2 Astrograph OTA

This standalone 11-inch astrograph combines a 279 mm Rowe-Ackermann Schmidt optical system with a 620 mm focal length, f/2.2 design, StarBright XLT coatings, Ultra-Stable Focus System, ventilation fan, dual dovetail bars, wide camera adapters, and a large optimized imaging circle.

• 279 mm Rowe-Ackermann Schmidt Astrograph
• 620 mm focal length with listed f/2.2 optical ratio
• StarBright XLT optical coatings
• 43.3 mm optimized image circle
• Ultra-Stable Focus System
• Integrated ventilation fan
• 42 mm and 48 mm camera adapters
• Dual full-length CGE-style dovetail bars

Large-Sensor Deep-Sky Imaging

The supplied application focuses on wide-field deep-sky imaging of nebulae, galaxies, and other extended celestial targets across large-format sensors, with the f/2.2 optical system supporting shorter exposure workflows while final tracking, camera compatibility, field illumination, filter selection, calibration, and image quality depend on the separately selected imaging system.

Why Choose Celestron S 279/620 RASA 1100 V2 Astrograph OTA

This model is a suitable choice when a buyer needs an 11-inch RASA optical tube with a fast f/2.2 imaging system, StarBright XLT coatings, large optimized image circle, Ultra-Stable Focus System, integrated ventilation, dual mounting bars, and supplied camera adapters for a compatible high-capacity mount.

• Large 11-inch aperture for the listed imaging format
• Fast f/2.2 optical system with 43.3 mm image circle
• Camera adapters, cooling fan pack, dust cover, and dual dovetail bars included

Celestron 2-Year Limited Warranty

The supplied product information lists a 2-year limited warranty for this optical tube assembly, while the current manufacturer listing provides separate RASA 11 technical details, so buyers should confirm the applicable US warranty terms, optical coverage, camera adapter coverage, ventilation system coverage, registration requirements, and authorized service process before completing the imaging system.