Celestron CGX 11" Rowe-Ackermann Schmidt Astrograph V2
The Celestron CGX 11” RASA Equatorial Telescope introduces a new standard in astroimaging systems, all at a highly competitive price point. This advanced-level imaging setup combines the Rowe-Ackermann Schmidt Astrograph...
The Celestron CGX 11” RASA Equatorial Telescope introduces a new standard in astroimaging systems, all at a highly competitive price point. This advanced-level imaging setup combines the Rowe-Ackermann Schmidt Astrograph (RASA) with the CGX mount, delivering exceptional performance and making it a perfect choice for experienced astrophotographers.
The Rowe-Ackermann Schmidt Astrograph (RASA) V2 is specifically designed for deep-sky astroimaging and works seamlessly with modern DSLR and astronomical CCD cameras. Its fast and wide-field f/2.2 system allows for shorter exposure times compared to traditional f/10 astroimaging, without compromising on resolution. The reduced sub-exposure times alleviate the need for precise and extended equatorial tracking, often eliminating the necessity for autoguiding.
The RASA 11 V2 is built on the legacy of Celestron's Schmidt Cameras from the 1970s, which significantly reduced exposure times. Today, with CCD sensors as large as or larger than film, the RASA 11 V2 offers an optimized 43.3mm image circle, capturing pinpoint stars on the largest imaging sensors. This vast image circle, combined with a short 620mm focal length, makes it suitable for wide-field imaging, creating extensive night sky mosaics, surveys, and even comet hunting.
The optical system of the RASA 11 V2 features advanced optics with a 4-element rare-earth glass design, ensuring high-quality images free from false color, coma, and field curvature. The optical performance is consistent across the entire image circle, offering impressive results, even for instruments far more expensive. Vignetting is also minimized.
The system includes the innovative Ultra-Stable Focus System (USFS), featuring a precision linear ball bearing that minimizes focus shift and mirror flop. The USFS is compatible with the optional Celestron Focus Motor (#94155-A), and the integrated 12V DC MagLev fan enhances temperature equilibrium and promotes optimal airflow through the dust-filtered optical tube.
The entire RASA 11 V2 is engineered as an integrated astroimaging system, with every component meticulously optimized for peak performance with DSLR and CCD cameras. It features a fully-multicoated optical window or an optional imaging filter and Dovetail CGE bars on top of the optical tube for accessory attachment.
As for the CGX mount, it represents the culmination of Celestron's experience in designing German equatorial mounts. The CGX can effortlessly support the RASA 11, making it an excellent choice for both backyard and remote astrophotographers. This mount offers a remarkable load capacity to weight ratio, a compact design, and advanced features supporting high-end telescopes, imaging setups, and the latest wireless tech accessories.
The CGX mount has been designed with several objectives in mind, including a lower profile EQ head for a more compact and stable configuration, an enhanced drive system, remote operation-friendly features equipped with home and limit optical sensors, improved polar alignment adjustments, and enhanced cable management. These enhancements not only contribute to the mount's sturdiness but also make it more user-friendly and easy to transport.
Specifications
OPTICAL TUBE INFO: | |
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Optical Design: | Rowe-Ackermann Schmidt Astrograph |
Aperture: | 279mm (11") |
Focal Length: | 620mm (24.4") |
Focal Ratio: | f/2.2 |
Central obstruction diameter: | 114mm (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 Circle: | 43.3mm (1.7") Ø , 4.0° |
Useable field: | 52mm (2.04") Ø , 4.8° only minimal performance loss at edge of FOV |
Wavelength range: | 400 - 700 nm |
Spot size: | < 4.4 μm RMS across FOV |
Optical Coatings: | StarBright XLT |
Off-axis Illumination: | 83% at 21mm (.82") off-axis |
Optical Window: | 68mm (2.67") Ø |
Back focus with included camera adapter: | 55mm (2.16") |
Back focus from top of threaded collar: | 72.8mm (2.86") |
Optical Tube: | Aluminum |
Optical Tube Length: | 838.2mm (33") |
Optical Tube Diameter: | 330.2mm (13") |
Focuser: | Ultra-Stable Focus System |
Finderscope: | Not included |
Optical Tube Weight: | 43 lbs (19.5 kg) |
Other Features: | Ventilation fan, dual dovetail mounting bars |
Included items: | 42mm (1.65") T-thread camera adapter 48mm (1.89") camera adapter Dust cover Fan battery pack |
Dovetail: | CGE Dovetail Bar |
MOUNT INFO: | |
Mount Type: | Computerized Equatorial |
Instrument load capacity: | 55 lbs (25 kg) |
Height adjustment range (includes mount and tripod): | 1200.15mm - 1968.5mm (47.25" - 77.5") |
Tripod Leg Diameter: | 50.8mm (2") Steel tripod |
Latitude adjustment range: | 3° - 65° |
Mount Head Weight: | 44 lbs (20 kg) |
Accessory Tray: | Yes |
Tripod Weight: | 19.2 lbs (8.7 kg) |
Weight of Counterweights: | 4 x 11 lbs |
Slew Speeds: | 9 slew speeds - max speed 4°/second |
Tracking Rates: | Sidereal, Solar and Lunar |
Tracking Modes: | EQ North and EQ South |
GPS: | N/A |
Dovetail Compatibility: | Dual saddle plates (CG-5 and CGE saddle) |
Number of Auxiliary Ports: | 2 AUX Ports (Hand Control can use either AUX Port) |
Autoguide Port: | Yes |
USB Port: | Yes, input for Mount and Hand Control |
Power Requirements: | 12V DC, 4 amps |
Motor Drive: | DC servo motors |
Alignment Procedures: | 2-Star Align, 1-Star Align, Solar System Align, Last Alignment, Quick Align |
Periodic Error Correction: | Yes |
Computer Hand Control: | 2 line x 18 character backlit Liquid Crystal Display, 19 LED backlit buttons, USB 2.0 Port for PC connection |
NexStar+ Database: | 40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects |
Software: | CPWI Telescope Control Software, Celestron Starry Night Special Edition Software, and SkyPortal App |
Total Kit Weight: | 150.2 lbs (68 kg) |
Included Items: | CGX Equatorial Head CGX Tripod Accessory Tray 4 x 11 lbs counterweights NexStar+ Hand Control Counterweight Shaft 8mm Allen Wrench 12V DC Power Cable Hand Control Holster |
Solar Warning |
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California Residents |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. |
Software and Documentation