Celestron CGX 11" RASA f/2.2 Equatorial Imaging Telescope

Celestron CGX 11" RASA f/2.2 Equatorial Imaging Telescope

DESCRIPTION

The CGX 1100 RASA is a complete imaging system built around the Rowe-Ackermann Schmidt Astrograph optical design, featuring a 279 mm aperture and a 620 mm focal length at f/2.2. The 4-element rare-earth glass corrector guarantees images free from chromatic aberration, coma, or field curvature. It delivers a 43.3 mm optimized image circle, with only minimal performance loss at 52 mm, making it ideal for full-frame sensors.

The Ultra-Stable Focus System minimizes mirror shift and mirror flop, thanks to its linear ball bearing mechanism. It's compatible with the optional Celestron focus motor (#94155-A). Cooling is provided by a built-in 12V MagLev fan with a battery pack. The optical tube includes a 68 mm window, T-thread (42 mm) and M48 (48 mm) camera adapters, and dual CGE-style dovetails (top and bottom) for accessories.

The CGX mount supports modern control protocols (CPWI, SkyPortal, Starry Night SE), features precise All-Star Polar Alignment, programmable periodic error correction (PPEC), and has ports for USB, autoguider, and auxiliary connections. Its compact design, steel tripod legs (50.8 mm), and four 11 lb counterweights provide excellent stability and transportability.

TECHNICAL SPECIFICATIONS

Optical Tube

• Optical Design: Rowe-Ackermann Schmidt Astrograph

• Aperture: 279 mm (11")

• Focal Length: 620 mm

• Focal Ratio: f/2.2

• Central Obstruction Diameter: 114 mm (41%)

• Light Gathering Power: 1588x (vs human eye)

• Resolution (Rayleigh): 0.49 arcseconds

• Resolution (Dawes): 0.41 arcseconds

• Optimized Image Circle: 43.3 mm (1.7"), usable up to 52 mm (2.04")

• Wavelength Range: 400 – 700 nm

• Spot Size: < 4.4 µm RMS across entire FOV

• Coatings: StarBright XLT

• Optical Window Diameter: 68 mm

• Back Focus (from camera adapter): 55 mm

• Back Focus (from thread top): 72.8 mm

• Focuser: Ultra-Stable Focus System

• Tube Material: Aluminum

• Tube Length: 838.2 mm (33")

• Tube Diameter: 330.2 mm (13")

• Tube Weight: 19.5 kg (43 lbs)

• Accessories Included: T-thread adapter (42 mm), M48 adapter, dust cap, fan battery pack

• Mounting: CGE-style dovetail (top and bottom)

• Finderscope: Not included

CGX Mount

• Mount Type: Computerized German Equatorial

• Payload Capacity: 25 kg (55 lbs)

• Height Range (tripod + head): 1200.15 – 1968.5 mm (47.25" – 77.5")

• Tripod Leg Diameter: 50.8 mm (2")

• Latitude Adjustment Range: 3° to 65°

• Mount Head Weight: 20 kg (44 lbs)

• Tripod Weight: 8.7 kg (19.2 lbs)

• Counterweights: 4 × 11 lbs (5 kg)

• Slew Speeds: 9 speeds, max 4°/s

• Tracking Rates: Sidereal, Solar, Lunar

• Tracking Modes: EQ North, EQ South

• PEC: Yes, permanently programmable

• Alignment Options: 1-Star, 2-Star, Solar System, Last Alignment, Quick Align

• Ports:

  • 2 AUX ports

  • 1 ST4 autoguider port

  • USB 2.0 (for hand control or PC)

• Power Input: 12V DC, 4A

• Dovetail Compatibility: Dual saddle (CG-5 and CGE)

• Hand Controller: NexStar+ with LCD (2-line, 18-character), USB port

• Software: CPWI, SkyPortal App, Starry Night Special Edition

• Database: 40,000+ objects, 100 user-defined, detailed info on 200+ targets

• Total Kit Weight: 68 kg (150.2 lbs)

• Included Items:

  • CGX Equatorial Head

  • CGX Tripod

  • Accessory Tray

  • 4 x 11 lb Counterweights

  • NexStar+ Hand Control

  • Counterweight Shaft

  • 8 mm Allen Wrench

  • 12V DC Power Cable

  • Hand Control Holster