About this product
Model: cel_cgx-l_1100_rasa_12078
Part Number: 12074-CGL
New V2 model!
"The [Rowe-Ackerman Schmidt] Astrograph’s performance was extremely good. Using a DSLR with an APS-C sensor, the scope gave us a measured field of view of 1.6x2 degrees. We found our images went deep very quickly, a five-second test at ISO 1600 showing a tremendous amount of detail in and around the Orion Nebula, M42. The billowing nebula had lots of fine structure in it and this was even more impressive when we compared the shot with a similar field taken by a 4-inch apochromatic refractor. The larger aperture of the RASA really delivered a tremendous improvement in resolution. The start were sharp across the entire field and showed no serious distortion right to the frame corners. The four-element lens group in the centre of the corrector really did its job well; the quality of the field was quite superb." Pete Lawrence writing for BBC Sky at Night magazine.
The Celestron astrograph telescope features 11" f/2.2 Rowe-Ackermann Schmidt optics and rare-earth glass for images free from false colour, coma and field curvature. The large 70mm imaging circle ensures pinpoint stars to the edges of the largest imaging sensors.
This fast, wide-field f/2.2 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.
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.
Today, with CCD sensor sizes as large as film—or larger—the Schmidt Astrograph offers a full 70 mm optimised image circle to capture pinpoint stars on the largest imaging chips. 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.
Optical Performance
The Rowe-Ackermann Schmidt Astrograph features newly designed optics with 4-element rare-earth glass for images free of false colour and aberrations like coma and field curvature. The optical quality and spot size across the entire image circle is unprecedented for an astrograph in this price range—or even that of a much more expensive instrument. The design also provides minimal vignetting.
Advanced Features
Advanced features like a custom engineered linear brass focuser bearing enable fine focus adjustments and a 12V MagLev fan reduces cooldown time and provides optimal airflow through the dust filtered optical tube.
Engineered as a complete astroimaging system, every component of the Rowe-Ackermann Schmidt Astrograph is optimised for peak performance with DSLR and astronomical CCD cameras. Down to the thickness of the glass used in the included fully-multicoated optical window or an optional imaging filter, every component of the system has been taken into careful consideration to work together seamlessly.
Celestron CGX-L 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.
Key design goals included larger 144 mm diameter worm wheels which provide smoother operation and can more accurately drive heavier loads, longer 270 mm dovetail saddle to support larger optical tubes, remote operation friendly features such as home and limit optical sensors, easier polar alignment adjustments, and better cable management overall. In addition to that, we’ve made mechanical and ergonomic improvements throughout to make the mount sturdier, easier to use, and easier to transport. COMPACT. ERGONOMIC. INNOVATIVE.
CGX-L Product Tour Video
GENERAL FEATURES
- 11" RASA optical tube assembly
- CGX-L EQ Mount and Tripod
- Ultra-fast, 11-inch f/2.2 optical design with rare-earth glass for images free of false color, coma, and field curvature. Cuts imaging time by more than half
- Expansive 43.3 optimized image circle maintains pinpoint stars to the far corners of even the largest astroimaging sensors, while the usable field extends even further to 52 mm for larger format sensors
- Custom engineered linear brass focuser bearing reduces image shift and enables precise, smooth, focusing
- Quiet, high-output 12V MagLev fan reduces cooldown time and blocks dust
- Common camera adapters (T-thread and M48) included for easy attachment to popular CCD and DSLR cameras
NEW CGX-L FEATURES
- Increased 75 lb load capacity. Exceptional load capacity to weight ratio
- Additional Aux accessory ports and autoguider port on the Dec axis for better cable management
- 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 70 mm stainless steel tripod legs with a wider stance for improved stability under heavy loads
- New accessory tray holds three 1.25” and two 2” eyepieces with an upright stand for your smartphone or tablet
- Heavy duty, 31.5 mm stainless steel counterweight shaft to support additional counterweights
- Optional add-on polar axis finderscope custom designed for CGX and CGX-L
- Supports WiFi and wireless operation accessories such as StarSense AutoAlign and SkyPortal WiFi Module (sold separately)
MOUNT FEATURES
- Compact, lower profile equatorial head provides improved stability and portability. Sturdier and more rigid with quicker dampening time
- Improved motors provide more torque, better slewing and tracking under heavy loads
- Heavy duty belt-drive system minimizes backlash while providing smooth motor operation at full capacity
- Clear windows built into motor covers so pulleys and belts can be monitored
- 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
- Internal hard stops for both axes prevent cable tension and tripod strike
- Internal optical sensors on both axes for simple and safe remote operation
- Home sensors allow the mount to always start in the index position regardless of orientation before a power reset
- Limit sensors automatically shut off slewing or tracking before reaching the hard stop fail safe
- Includes Celestron's new PWI telescope control software, co-developed by PlaneWave Instruments. Software features multi-point mount modeling for extremely precise pointing accuracy
- Software Polar Align: “All-Star Polar Alignment” allows quick and very precise polar alignment. Align on any bright named star without extra polar alignment accessories, apps, or other assistance
- Adjustable EQ head position to optimize center of gravity over the tripod and fully utilize the increased 3°-65° latitude range
- Dual-fit Vixen/CG-5 and Losmandy/CGE dovetail saddle
- +20° of additional tracking past the meridian on either side
- Redesigned tripod has a widened stance for added stability. The minimum tripod height has also been lowered per user feedback
- Tripod legs can be collapsed with accessory tray installed for faster setup and transport
IMPROVED ERGONOMICS
- Integrated handles for easy transport and portability
- All-new ergonomically designed dovetail clamping knobs
- Innovative and improved polar alignment adjustment system
- All-new ergonomic adjustment knobs with reduced friction for smooth and easy positioning under full loads. Stationary latitude knob with a newly-designed linkage system greatly reduces the amount of friction when polar aligning the mount. Redesigned azimuth adjustment with low-friction Teflon bearings to make adjustments easy under full load. No more binding, rough adjustments!
- Easy to read latitude scale
CGX-L MOUNT ELECTRONICS
- NexStar+ hand control with USB port
- USB 2.0 port used to connect directly to PC with PWI Software
- 2 available autoguider ports for optimum cable management
- PEC sensor and PPEC ready
- Threaded 12VDC power input barrel connector
- Internal Real Time Clock (keeps time and site information saved)
- On/Off rocker switch with red LED
What's in the box
- Telescope OTA
- CGX-L Equatorial Head
- CGX-L Tripod
- Accessory Tray
- 2 x 22 lb Counterweight
- NexStar+ Hand Control
- DC Power Cable (Cigar Plug)
- 8 mm Allen Key (in rear carry handle)
Specifications
| Optical Design | Rowe-Ackermann Schmidt |
| Aperture (mm) | 279 mm (11 in) |
| Focal Length | 620 mm |
| Focal Ratio | 2.22 |
| Backfocus from front lens assembly | 72.8 mm |
| Backfocus from included camera adapters | 55 mm |
| Central obstruction diameter | 114mm |
| Finderscope | Not Included |
| Light Gathering Power (Compared to human eye) | 1588x |
| Optical Coatings | StarBright XLT |
| Total Telescope Kit Weight | 143 lbs |
| Resolution (Rayleigh) | 0.5 arc seconds |
| Resolution (Dawes) | 0.41 arc seconds |
| Optical Tube Length | 33in |
| Mount | German Equatorial |
| Instrument load capacity | 75 lbs |
| Tripod height adjustment range | 35.75” to 52.75” |
| Tripod leg diameter | 2.75" |
| Latitude adjustment range | 3º-65º |
| Tripod Weight | 46.2 lbs |
| EQ Head Weight | 52.6 lbs |
| Max Slew Speed | 4º/second (3º/second is default) |
| Tracking Rates | Sidereal, Solar and Lunar |
| Number of Auxiliary ports (for hand control and accessories) | 4 |
| Autoguide port | Yes |
| USB Port | Yes |
| Software | PWI Telescope Control Software |
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