Celestron 11" f/2.2 Rowe-Ackermann Schmidt Astrograph with CGEM DX Mount

Celestron 11" f/2.2 Rowe-Ackermann Schmidt Astrograph with CGEM DX Mount

Celestron 11" f/2.2 Rowe-Ackermann Schmidt Astrograph with CGEM DX Mount

B&H # CE11RCGEMD MFR # 11006
No Longer Available

Product Highlights

  • 11" Catadioptric Telescope
  • Fast f/2.2 Focal Ratio
  • 620mm Focal Length
  • StarBright XLT Optical Coating System
  • 10:1 FeatherTouch Micro Focuser Knob
  • CGEM DX German Equatorial Mount
  • Adjustable Height 3" Steel Leg Tripod
  • NexRemote Telescope Control Software
  • Database of 40,000+ Objects
  • Multiple Alignment Systems
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  • 1Description

The 11" f/2.2 Rowe-Ackermann Schmidt Astrograph with CGEM DX Mount from Celestron combines an 11" f/2.2 Rowe-Ackermann Schmidt catadoptric optical tube assembly (OTA) and a computer-controlled motorized equatorial mount, with a heavy-duty stainless steel tripod to create a rig specifically designed for astrophotography and astroimaging.

The OTA uses Celestron's improved proprietary StarBright XLT multi-coating system that increases light transmission throughout the entire optical path with anti-reflection multicoated lenses, highly reflective multicoated mirrors, and 4-element rare-earth glass. The 70mm imaging circle is made to cover today's large DSLR and CCD imaging sensors to capture full-frame shots without vignetting. Its fast focal ratio reduces exposure times without sacrificing image quality, and gives the user more time for multiple shots of the same object for layering or with different filters, or to change subjects completely. A custom-designed 10:1 linear brass focuser enables very precise focusing to clearly resolve topographic details on the Moon, virtually remove comas and corona from distant stars, and reveal details of most other celestial objects in between.

To find, track, and control the OTA it is attached to the CGEM equatorial mount. This computer controlled and motorized mount uses the NexStar hand controller with a 40,000+ database, multiple alignment procedures, and full Go-To capabilities. To enhance the imaging clarity the controller has Programmable Periodic Correction (PEC), low vibration low-cog servo motors, steel worm gear and brass wheels, and autoguide and auxiliary ports.

Supporting the mount and OTA is a heavy-duty adjustable-height tripod with 3" stainless steel legs equipped with vibration-dampening feet. The feet are bright orange to make them highly visible in low light, reducing the possibility of tripping over them and ruining a shot. An accessory tray helps keep accessories and equipment organized, and a holder for the NexStar controller is also included.

  • 11" f/2.2 Rowe-Ackermann Schmidt Astrograph Telescope (OTA only)

    The 11" f/2.2 Rowe-Ackermann Schmidt Astrograph Telescope from Celestron is specifically designed for astrophotography and astroimaging with a large 11" aperture and fast f/2.2 focal ratio. The OTA is being offered by itself without a mount, and comes with a Celestron CGEM-style dovetail plate for use on compatible mounts and tripods. Using 4-element rare-earth optical glass lenses ensures accurate color rendition and elimnates aberrations such as coma and field curvatures. The improved StarBright XLT multi-coating system, which includes anti-reflection coatings on the lenses and highly-reflective coatings on the mirrors, increases light transmission throughout the entire optical path. A 12V MagLev fan reduces cooldown time and provides optimal airflow through the optical tube while filtering harmful dust from the interior.

    The 43.3mm imaging circle is made to cover today's large DSLR and CCD imaging sensors to capture full-frame shots with vignetting, while a fast focal ratio reduces exposure times without sacrificing image quality and gives the user more time for multiple shots of the same object for layering or with different filters. A custom-designed FeatherTouch micro focus system has a 10:1 reducer with linear brass focuser bearing to enables very precise focusing to clearly resolve topographic details on the Moon or split double stars, and reveal details of most other celestial objects in between. Since this OTA is designed as an imaging scope, a 42mm T-thread camera adapter and 48mm camera adapter are provided. Other adapters are available if required.

    Optical Performance
    • 11" diameter aperture
    • 620mm focal length
    • Fast f/2.2 focal ratio
    • Proprietary StarBright XLT fully multicoated optical system
    • 4-element rare-earth glass for true color rendition without aberrations across the entire field of view
    • 43.3mm image circle captures pinpoint stars on today's large CCD and DSLR imaging chips
    • Resolution: 0.5 arc sec (Rayleigh), 0.41 arc sec (Dawes)
    StarBright XLT Coating System
    • Multi-layer mirror coatings made from layers of aluminum, SiO2 (quartz), TiO2 (titanium dioxide), and Si02 (silicon dioxide)
    • Reflectivity is flat across the light spectrum, for both astrophotography/astroimaging and visual observation
    • Multi-layer anti-reflective coatings made from layers of MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide)
    • High-transmission water white glass corrector lens with 97.4% light transmission
    Focuser
    • Linear brass focuser-bearing reduces image shift
    • Dual-speed 10:1 FeatherTouch micro focus knob provides precise focusing
    Construction Details
    • 42mm T-thread and M48 camera adapters included for attachment to CCD and DSLR cameras
    • Heavy duty CGEM dovetail plate
    • 12VDC MagLev fan reduces cool-down time, provides airflow, and filters dust
    UPC: 050234910750
  • CGEM DX Computerized Mount & Tripod

    The The CGEM DX Computerized Mount & Tripod from Celestron is a fully computerized equatorial mount capable of carrying Celestron's high-end 11" and 14" optical tubes. The CGE PRO style, 3" leg tripod is strong enough to hold the 14" optical tube securely while dampening vibration. Capable of holding 50 lbs of payload and slewing at 5° per second, it can instantly point to any of the 40,000+ celestial objects in the database. The CGEM DX mount is user friendly with large altitude and azimuth adjustment knobs for quick and easy polar alignment adjustment. The RA and DEC motor wiring is internal, providing a clean look and an easy and trouble free set up.

    The All-Star polar alignment procedure allows users to choose any bright star in the sky and the software then calculates and assists with the polar alignment. It comes with Permanent Periodic Error Correction (PEC) which allows users to train out the worm gears periodic errors, while the mount retains the PEC recordings. For objects near the Meridian the CGEM DX will track well past the Meridian providing uninterrupted imaging through the most ideal part of the sky. Besides the over 40,000 objects in the database, there is the capacity for 100 user defined programmable objects. There is enhanced information on over 200 objects.

    The constantly regulated electrical power to the motors makes them capable of driving the telescope even when it is not perfectly balanced. The CGEM DX can thus carry a payload capacity of much larger mounts without sacrificing smooth tracking motion and pointing accuracy across the entire sky.

    • Capacity of 50 lbs supports OTAs that usually need a larger mount
    • Computerized Equatorial Mount for accurate pinpoint target acquisition and slewing
    • Sturdy 3" steel tripod with accessory tray provides stability and convenience
    • 40,000+ object database with over 100 user-definable objects and expanded information on over 200 objects gives versatility and hours of satisfying night sky viewing
    • NexStar computer control technology finds, tracks and automatically slews the telescope
    • Hand control software and the motor control units are flash upgradeable for downloading product updates via the Internet
    • Software functionality includes mount calibration, database filter limits, hibernation, five alignment procedures, and user-defined slew limits
    • Customizable database lists the most famous deep-sky objects by name and catalog number
    • Permanent Programmable Periodic Error Correction (PEC) corrects for periodic tracking errors inherent to all worm drives so that the targeted object never falls out of view
    • Steel worm gear and 90 mm pitch diameter brass worm wheel provide smooth and accurate slewing
    • Low Cog DC Servo drive motor with integrated optical encoders offers a smooth, quiet operation and long motor life. The motor armatures are skewed to minimize cogging which is required for low speed tracking
    • Internal cable wiring provides a clean look and easy, trouble-free transportation and set up
    • Designated six-pin RJ-12 modular jack and a ST-4 compatible guide port
    • Autoguide port and auxiliary ports located on the electronic plate for long exposure astrophotography
    • Double line, 16-character LCD hand control with backlit LED buttons for easy operation of GoTo features
    • RS-232 communication port on hand control to control the telescope via a personal computer
    • NexRemote telescope control software, for advanced control of the telescope via computer
    • Precision machined 40 mm diameter steel Polar shafts supported by multiple tapered roller bearings and ball bearings for smooth movement
    • GPS-compatible with optional SkySync GPS Accessory
In the Box
Bundle Items
  • 42mm T-Adapter
  • 48mm Camera Adapter
  • Limited Two-Year Warranty
  • CGEM DX Mount
  • CGE PRO Style 3" Steel Tripod
  • Accessory Tray
  • 22 lb Counterweight
  • Hand Control
  • Car Battery Adapter
  • Celestron Two Year Warranty
Table of Contents
  • 1Description
  • 11" f/2.2 Rowe-Ackermann Schmidt Astrograph Telescope (OTA only)
    Optical Design Rowe-Ackermann Schmidt
    Aperture 11.0" / 27.9 cm
    Focal Length 620mm
    Focal Ratio f/2.2
    Back Focus 2.2" / 5.5 cm, from front lens assembly
    Eyepiece Barrel Diameter N/A
    Diagonal None
    Finderscope None
    Tripod None
    Mount Type CGEM dovetail plate
    Power Requirement 12 VDC for fan operation
    Length 33.0" / 83.8 cm
    Weight 43.0 lb / 19.5 kg
    Packaging Infouqtwsuvrryrscfwxwuaqvawqtqwqycvbzf
    Box Dimensions (LxWxH) 39.0 x 20.0 x 19.0"
  • CGEM DX Computerized Mount & Tripod
    Mount Type Computerized Equatorial
    Load Capacity 50 lb / 22.7 kg
    Motor Low cog DC Servo motors with encoders, both axes
    GO-TO Capability Yes
    Altitude / Latitude Adjustment Latitude Range: 15° to 70°
    Includes Tripod/Pier Adjustable, Stainless Steel Tripod
    Power Source 12 V DC 3.5 Amps, Car battery adapter
    Weight Tripod Weight: 45 lb / 20.41 kg
    Mount Weight: 41 lb / 18.6 kg
    Counterweights: 1 x 22 lb / 10 kg
    Tracking Ability Tracking rates: sidereal, solar, lunar
    Tracking modes: alt-az, EQ north/south
    Slew speeds: 1, 2, 3°/sec - 64x, 32x, 16x, 8x, 4x, 2x
    Alignment procedures: last align, quick align 1-star, 2-star, solar system
    Packaging Info
    Box Dimensions (LxWxH) 1.0 x 1.0 x 1.0"
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