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Large silver cylindrical telescope on a sturdy equatorial mount with counterweights

Celestron

Celestron CGX 11" RASA V2 Astrograph f/2.2 558x

SKU CH-TDXF-ZSCKS

An 11-inch f/2.2 Rowe-Ackermann Schmidt astrograph on a CGX equatorial mount delivers 558× magnification and a 1.15-degree field for ultra-fast deep-sky imaging

  • Part12060
  • CompatibilityCamera, Laptop
  • Field of View1.15 degrees
  • Total Magnification558x
  • Size/Dimensions9.1 in x 9.1 in x 9.1 in
  • Ultra-fast f/2.2 optics capture deep-sky images in a fraction of the time
  • Four-element rare-earth glass delivers images free of false color and aberrations
  • Ultra-Stable Focus System with linear ball bearing minimizes focus shift and mirror flop
  • CGX equatorial mount handles the 11" RASA with exceptional load capacity to weight ratio
  • Wide 1.15-degree field of view at 558x magnification frames large nebulae and galaxies

Telescope for Advanced Astroimaging

The Celestron CGX 11" RASA V2 is a complete astroimaging system built around an 11-inch Rowe-Ackermann Schmidt Astrograph. It operates at a fast f/2.2 focal ratio to capture deep-sky images in a fraction of the time required by traditional f/10 setups. The system pairs the optical tube with a CGX equatorial mount designed for high load capacity and compact portability. It is intended for experienced imagers using DSLR or astronomical CCD cameras.

Mount Setup and Focus Stability

The CGX mount includes Celestron PWI control software, Starry Night Special Edition, SkyAlign, and permanently programmable periodic error correction for precise tracking. All-Star Polar Alignment simplifies the initial setup routine for backyard or remote observatory use. The RASA 11 V2 features an Ultra-Stable Focus System with a precision linear ball bearing that minimises focus shift and mirror flop during long exposures. The optical tube measures 9.1 in x 9.1 in x 9.1 in and requires a camera and laptop for operation.

Fast f/2.2 System Constraints

The f/2.2 design delivers a wide 1.15-degree field of view at 558x total magnification, optimised for large-format sensors rather than visual observation. Shorter exposure times reduce demands on guiding accuracy but require precise collimation and flat-field calibration to maintain corner illumination. The fixed focal ratio prevents focal reduction or extension for different image scales. The system is not suited for planetary imaging or users needing interchangeable focal lengths.

Highlights

  • Ultra-fast f/2.2 optics capture deep-sky images in a fraction of the time
  • Four-element rare-earth glass delivers images free of false color and aberrations
  • Ultra-Stable Focus System with linear ball bearing minimizes focus shift and mirror flop
  • CGX equatorial mount handles the 11" RASA with exceptional load capacity to weight ratio
  • Wide 1.15-degree field of view at 558x magnification frames large nebulae and galaxies

Specifications

BrandCELESTRON
Part12060
CompatibilityCamera, Laptop
Field of View1.15 degrees
Total Magnification558x
Size/Dimensions9.1 in x 9.1 in x 9.1 in

Questions about this item

How can I confirm the CGX 11" RASA V2 is tracking accurately after polar alignment?

Use the All-Star Polar Alignment routine in the Celestron PWI software, then run a short test exposure; round stars across the 1.15-degree field confirm the mount and optics are working as intended.

What accessories are included with the CGX 11" RASA V2 and what must I purchase separately?

The system ships with the RASA 11 V2 optical tube, CGX equatorial mount, tripod, and control software; you must supply a compatible DSLR or astronomical CCD camera and a laptop for operation.

Which aperture version matches the 558x magnification and f/2.2 focal ratio listed for this model?

The 11-inch (1100 mm) aperture RASA V2 is the only version that delivers 558x total magnification at f/2.2 in this configuration.

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