Celestron RASA Rowe Ackermann Schmidt Astrograph 11 in. Telescope with CGX Mount - 12059

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Item #CELE-12059

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  • Designed from scratch inside and out for superior technical performance and an unbeatable user experience.
  • Paired with Celestron’s groundbreaking Rowe-Ackermann Schmidt Astrograph (RASA), the CGX is ready to capture stunning deep sky images at ultra-fast f/2.2.
  • CGX's all-new industrial design features a lower profile for increased stability and rigidity. The mount easily handles up to 55 lb of payload.
  • New mechanical design features a belt drive system to drive the worm gear for reduced backlash and improved responsiveness.
  • All internal cabling and home/limit sensors with hard stops virtually eliminate the risk of cable snags or tripod strikes.
  • Dual dovetail saddle accommodates both CGE/Losmandy and CG-5/Vixen style dovetails so you can pair this mount with just about any optical tube.
  • Larger knobs and longer clutch levers make setting up your telescope and adjusting your polar alignment easier and more secure.
  • New tripod design features a wider stance and height index marks for easy leveling. The accessory tray is integrated into the tripod for quick setup.
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  • Description

    Take your astroimaging to new heights with an all-new mount from Celestron: CGX. This German equatorial mount offers all the performance and features found on observatory grade mounts in a user-friendly package that can travel with you to remote observing sites.

    To create CGX, Celestron engineers started from the ground up with a completely new industrial and mechanical design. The result is a streamlined, elegant mount—inside and out.

    Unbeatable Tracking Performance

    Under the hood, CGX is different from any other generation of German equatorial mount. You’ll find a new heavy duty belt-drive system driving the worm gear, which minimizes backlash and allows the mount to move smoothly under heavy loads.

    The worm gear itself is brass and spring-loaded for smooth operation. You can train CGX using permanent periodic error correction (PPEC) to eliminate periodic errors in the worm gear. Set it once and the errors are gone for as long as you own the mount.

    Safer and More Elegant Design

    Celestron’s team ran all of CGX’s cabling through the mount for a clean look. The power input and ports where you connect your computer, hand control, or other accessories remain stationary and do not move with the mount to eliminate the risk of cable wrap and tension.

    What’s more, the mount has built-in slew limits with hard stops. Internal optical sensors stop the mount from moving past these limits, so there’s never danger of your optical tube striking the tripod—a great feature if you plan on operating CGX remotely. But don’t worry, these slew limits are quite generous at 20 degrees past the meridian in each direction, so you can still capture astroimages across the clearest part of the night sky.

    Improved Design and Ergonomics

    When you look at CGX, one of first things you’ll notice is its low profile and wide stance compared with other GEM mounts. This new form factor anchors CGX to the ground for improved rigidity. Thanks to its super stable design, CGX can handle up to 55 lb of payload with ease—enough to accommodate your scope when it’s loaded with a full range of accessories like your DSLR or dedicated CCD imaging camera.

    CGX stands securely on a brand new tripod. It features strong 2” steel tripod legs with height index marks so you can quickly set up and level your tripod. The leg lock mechanisms are inward facing so you don’t snag or trip over them in the dark. Plus, CGX features an integrated accessory tray that remains attached to the tripod. It’s one less piece to keep track of in the field and helps the tripod lay flat without rolling around in your trunk.

    This mount features new clutch levers and polar alignment knobs so that you can make adjustments with just a twist of the wrist—even after a long night in the cold. The hand control offers an integrated USB port to make downloading software updates a breeze. You’ll also receive a new dual dovetail saddle so you can pair CGX with virtually any optical tube; it accommodates both CGE/Losmandy and CG-5/Vixen style dovetails.

    Paired with RASA for Astrophotography

    For the ultimate astroimaging performance, we’re offering CGX with Celestron’s innovative 11” Rowe-Ackermann Schmidt Astrograph (RASA). This dedicated imaging telescope allows you to capture large swaths of the night sky in seconds at ultra-fast f/2.2. Together, this combo is capable of producing huge mosaics of your favorite deep sky objects.

    Precision Tracking for Astroimaging

    Of course, you also get all of the innovative software technologies that make using a Celestron GEM mount so easy: SkyAlign and All Star Polar Alignment. SkyAlign allows you to center any three bright objects to align the telescope’s GoTo in minutes, while All Star gives you a super accurate polar alignment in a fraction of the time it takes to use a polar finderscope. Best of all, you don’t need a clear view of Polaris. Once you’ve set up your CGX, these automated procedures will have you ready to capture images in about 15 minutes.

    With the CGX mount, you’ll get more out of every imaging session. From detailed views of the planets to breathtaking images of deep sky objects, this versatile mount is ready to help you see and capture it all.


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  • Dimensions & Specifications

    Optical Design

    Rowe-Ackermann Schmidt


    279 mm (11 in)

    Focal Length

    620 mm

    Focal Ratio


    Backfocus from front lens assembly

    72.8 mm

    Backfocus from included camera adapters

    55 mm

    Central obstruction diameter



    Not Included

    Light Gathering Power (Compared to human eye)


    Optical Coatings

    StarBright XLT

    Resolution (Rayleigh)

    0.5 arc seconds

    Resolution (Dawes)

    0.41 arc seconds

    Optical Tube Length



    German Equatorial Mount

    Instrument load capacity


    Tripod height adjustment range

    47.25” to 77.5” including EQ head

    Tripod leg diameter


    Latitude adjustment range


    Tripod Weight

    19.2 lbs

    EQ Head Weight

    44 lbs

    Max Slew Speed

    5º/second (4º/second is default)

    Tracking Rates

    Sidereal, Solar and Lunar Number of Auxiliary ports (for hand control and accessories)

    Autoguide Port


    USB Port



    New telescope control PC software

    Included Items

    CGX Equatorial Head, CGX Tripod with Accessory Tray, one 17 lb counterweight, NexStar+ Hand Control, DC Power Cable (plugs into cigarette lighter socket)

  • Product Guarantee

    We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

    Manufacturer Warranty

    Default manufacturer warranty.

    Return & Exchange Policy

    At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

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