Celestron CGX-L RASA
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DESCRIPTION
The Celestron RASA 11 is a wide-field astrograph optimized for high-speed deep-sky imaging. It features a 620 mm focal length and a 43.3 mm optimized image circle, suitable for full-frame sensors. Its rare-earth 4-element optical group ensures perfect correction of coma, curvature, and chromatic aberration.
The Ultra-Stable Focus System with linear ball bearing suppresses image shift and mirror flop. A MagLev fan enhances cooldown with filtered airflow. The system includes M42 and M48 camera adapters and a multicoated optical window.
The CGX-L equatorial mount supports 75 lbs and features 144 mm worm wheels, dual dovetail saddles (CG-5/CGE), integrated PEC, and remote-friendly design. It supports CPWI, SkyPortal, ASCOM, and is ideal for observatories or mobile dark-sky imaging setups.
TECHNICAL SPECIFICATIONS
RASA 11 V2 Optical Tube
Optical Design: Rowe-Ackermann Schmidt Astrograph
Aperture: 279 mm
Focal Length: 620 mm
Focal Ratio: f/2.2
Central Obstruction: 114 mm (41%)
Optimized Image Circle: 43.3 mm (4.0°)
Usable Field: 52 mm (4.8°)
Rayleigh Resolution: 0.49 arcsec
Dawes Resolution: 0.41 arcsec
Spot Size RMS: < 4.4 μm
Spectral Range: 400 – 700 nm
Off-axis Transmission (21 mm): 83%
Back Focus with Adapter: 55 mm
Back Focus from Threaded Collar: 72.8 mm
Optical Window: 68 mm fully multi-coated
Focuser: Ultra-Stable Focus System
Cooling: MagLev fan, 12V battery included
Tube: Aluminum, Ø 330 mm, Length 838 mm
Tube Weight: 19.5 kg (43 lbs)
Dovetail: CGE (dual position)
CGX-L Mount
Mount Type: Computerized Equatorial GoTo
Payload Capacity: 75 lbs (34 kg)
Worm Wheels: 144 mm
Max Slew Speed: 3°/sec
Tracking Rates: Sidereal, Solar, Lunar
Alignments: 2-Star, 1-Star, Solar System, Quick Align
PEC: Yes
Ports: 4 AUX, 2 autoguide (1 near saddle), USB for mount and HC
Power Input: 12 V / 3 A
Tripod: 70 mm steel, height 838–1397 mm
Total Height: 1524–1956 mm
Mount Head: 23.8 kg (52.6 lbs)
Tripod: 21 kg (46.2 lbs)
Counterweights: 2 x 10 kg (22 lbs)
Total Weight: 84.2 kg (185.8 lbs)
Included Items
RASA 11 V2 Optical Tube
CGX-L Equatorial Mount
Steel Tripod
2 x 22 lb Counterweights
NexStar+ Hand Control
DC Power Cable
Camera Adapters (M42 & M48)
Counterweight Shaft
Allen Key
Software: CPWI, Starry Night SE, SkyPortal