Celestron CGX-L Equatorial 1100 RASA 11″ Telescope


  • Celestron RASA 11″ telescope and CGX mount package
  • Rowe-Ackermann 11-inch f/2.2 optical design
  • Rare-earth glass for images free of false color, coma, and field curvature
  • 43.3 mm optimised image circle with pinpoint stars to the far corners of even the largest astroimaging sensors. 52 mm usable field for larger format sensors
  • Custom engineered linear brass focuser bearing reduces image shift
  • Dual-speed 10:1 FeatherTouch Micro Focus Knob for precise focusing
  • Exceptional 34kg/75 lb load capacity CGX-L mount.
  • Larger 144 mm diameter worm wheels to better and more accurately drive heavier loads
  • Longer 270 mm dovetail saddle to better support larger optical tubes
  • Massive 70mm/2.75″  stainless steel tripod legs with a wider stance for improved stability under heavy loads
  • Spring-loaded brass worm wheel and stainless steel worm gear reduce friction and provide optimum gear mesh
  • Internal cabling for worry-free remote operation. Power input and lower accessory ports remain stationary while the mount slews to avoid snags
  • Includes Celestron’s new PWI telescope control software featuring multi-point mount modelling for extremely precise pointing accuracy
CPWIAll-Star Polar AlignmentNexRemoteStarry NightStarbright XLT Coatings

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Category: SKU: 12078 Tag:


Capture spectacular wide-field deep sky images in seconds with Celestron’s 11” Rowe-Ackermann Schmidt Astrograph (RASA) portable astrograph mounted on Celestron’s state-of-the-art CGX-L equatorial mount- a perfect astroimaging combination!

The Rowe-Ackermann Schmidt Astrograph builds on the legacy of Celestron’s Schmidt Camera, which allowed astrophotographers to produce images on film in the 1970s. This fast, wide-field f/2.2 astrographic system offers two huge advantages over traditional f/10 astroimaging: better apparent tracking and shorter exposures. That means you’ll create better-looking astroimages in a fraction of the time, even without the use of an autoguider. Celestron’s new Rowe-Ackermann Schmidt Astrograph will allow you to capture impressive deep-sky astroimages easier than ever before and it makes the perfect companion to today’s top DSLR or astronomical CCD cameras.

Today, with CCD sensor sizes as large as film—or larger—the Schmidt Astrograph offers a 43.3 mm optimised image circle to capture pinpoint stars on the largest imaging chips. (Note: Celestron previously published 70 mm which is actually the aperture of the last lens in the telescope. The optical design has not changed). Combine this large image circle with a focal length of just 620 mm and you have an instrument suitable for wide-field imaging, creating huge mosaics of the night sky, surveying, and even comet hunting.

Celestron’s original CGX Equatorial mount was designed from the ground up to provide a solid and accurate platform for your telescope for both visual and astro-imaging requirements. The CGX-L computerised equatorial mount is the latest addition to Celestron’s fully computerised equatorial mount series and represents a significant upgrade to the original CGX mount.

Capable of carrying Celestron’s largest optical tubes with ease, CGX-L is designed for backyard observatories and remote imagers looking for exceptional load capacity to weight ratio, compact design, and innovative features that fully support large telescopes, imaging kits, and the latest in wireless tech accessories. Celestron had a number of key design goals for the CGX-L which included an increased payload capacity, larger 144 mm diameter worm wheels, which provide smoother operation and can more accurately drive heavier loads, and longer 270 mm dovetail saddle to support larger optical tubes.

The CGX-L still retains remote operation friendly features such as home and limit optical sensors, easier polar alignment adjustments, and better cable management overall. In addition to that, Celestron have made mechanical and ergonomic improvements throughout to make the mount sturdier, easier to use, and easier to transport.

Furthermore, the mount can be controlled with software developed in conjunction with PlaneWave Instruments – called CPWI – and is supplied free with the mount. CPWI uses advance PointXP mount modelling that allows you to add 100+ points to an alignment model for the mount set up, for the most accurate pointing and tracking possible for your Celestron telescope. The software also features an All-Star Polar Alignment routine, motor focus control and plate solving. More details can be found here.


Optical DesignRowe-Ackermann Schmidt Astrograph
Aperture279mm (11″)
Focal Length620mm (24.4″)
Focal Ratiof/2.2
Central obstruction diameter114mm (4.48″) (41% of aperture diameter)
Light Gathering Power (Compared to human eye)1588x
Resolution (Rayleigh)0.49 arc seconds
Resolution (Dawes)0.41 arc seconds
Image Circle43.3mm (1.7″) Ø , 4.0°
Useable field52mm (2.04″) Ø , 4.8° only minimal performance loss at edge of FOV
Wavelength range400 – 700 nm
Spot size< 4.4 μm RMS across FOV
Optical CoatingsStarBright XLT
Off-axis Illumination83% at 21mm (.82″) off-axis
Optical Window68mm (2.67″) Ø
Back focus with included camera adapter55mm (2.16″)
Back focus from top of threaded collar72.8mm (2.86″)
Optical TubeAluminum
Optical Tube Length838.2mm (33″)
Optical Tube Diameter330.2mm (13″)
FocuserFeatherTouch microfocuser, coarse and fine focus
FinderscopeNot included
Optical Tube Weight43 lbs (19.5 kg)
Other FeaturesVentilation fan, dual dovetail mounting bars, mirror support clutches
Included items42mm (1.65”) T-thread camera adapter, 48mm (1.89”) camera adapter, fan battery pack
DovetailCGE Dovetail Bar
Mount TypeComputerised Equatorial
Instrument load capacity75 lbs (34 kg)
Height adjustment range (includes mount and tripod)908.05mm – 1339.85mm (35.75″ – 52.75″)
Tripod Leg Diameter69.85mm (2.75″) Steel tripod with graduated markings on lower section
Latitude adjustment range3° – 65°
Mount Head Weight52.6 lbs (23.8 kg)
Accessory TrayYes
Tripod Weight46.2 lbs (21 kg)
Weight of Counterweights1 x 22 lbs
Slew Speeds9 slew speeds – max speed 3°/second
Tracking RatesSidereal, Solar and Lunar
Tracking ModesEQ North & EQ South
Dovetail CompatibilityDual saddle plates (Vixen and CGE saddle)
Number of Auxiliary ports4 Aux ports (Hand Control can use any Aux port, 2 are located near the dovetail saddle for optional accessories)
Autoguide portYes, 2 ports (one is located near the dovetail saddle)
USB PortYes, input for Mount and Hand Control
Power Requirements12V DC, 3 amps
Motor DriveDC servo motors
Alignment Procedures2-Star Align, 1-Star Align, Solar System Align, Last Alignment, Quick Align
Periodic Error CorrectionYes
Computer Hand Control2 line x 18 character backlit Liquid Crystal Display, 19 LED backlit buttons, USB 2.0 port for PC connection
NexStar+ Database40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects
SoftwarePWI Telescope Control Software, Celestron’s Starry Night Special Edition Software, SkyPortal App
Total Kit Weight163.8 lbs (74.3 kg)
Included ItemsCGX-L Equatorial Head | CGX-L Tripod | Accessory Tray | 1 x 22 lb counterweight | NexStar+ Hand Control | DC Power Cable (item# 18769) | 8mm Allen wrench (contained in rear carry handle)

11″ Rowe-Ackermann Schmidt Astrograph Manual

CGX-L Mount Manual

Adaptor to Pier Info Guide

Celestron PWI Telescope Control Software Instruction Manual

Celestron Firmware Manager (CFM) Software

CPWI Software

Additional information

Weight92.243 kg


Optical Design


Celestron Technology

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