Capture spectacular wide-field deep sky images in seconds with Celestron’s 11” Rowe-Ackermann Schmidt Astrograph (RASA) portable astrograph mounted on Celestron’s state-of-the-art CGX-L equatorial mount- a perfect astroimaging combination!
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. This fast, wide-field f/2.2 astrographic 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. Celestron’s new Rowe-Ackermann Schmidt Astrograph will allow you to capture impressive deep-sky astroimages easier than ever before and it makes the perfect companion to today’s top DSLR or astronomical CCD cameras.
Today, with CCD sensor sizes as large as film—or larger—the Schmidt Astrograph offers a 43.3 mm optimised image circle to capture pinpoint stars on the largest imaging chips. (Note: Celestron previously published 70 mm which is actually the aperture of the last lens in the telescope. The optical design has not changed). 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.
Celestron’s original CGX Equatorial mount was designed from the ground up to provide a solid and accurate platform for your telescope for both visual and astro-imaging requirements. The CGX-L computerised equatorial mount is the latest addition to Celestron’s fully computerised equatorial mount series and represents a significant upgrade to the original CGX 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. Celestron had a number of key design goals for the CGX-L which included an increased payload capacity, larger 144 mm diameter worm wheels, which provide smoother operation and can more accurately drive heavier loads, and longer 270 mm dovetail saddle to support larger optical tubes.
The CGX-L still retains remote operation friendly features such as home and limit optical sensors, easier polar alignment adjustments, and better cable management overall. In addition to that, Celestron have made mechanical and ergonomic improvements throughout to make the mount sturdier, easier to use, and easier to transport.
Furthermore, the mount can be controlled with software developed in conjunction with PlaneWave Instruments – called CPWI – and is supplied free with the mount. CPWI uses advance PointXP mount modelling that allows you to add 100+ points to an alignment model for the mount set up, for the most accurate pointing and tracking possible for your Celestron telescope. The software also features an All-Star Polar Alignment routine, motor focus control and plate solving. More details can be found here.
|OPTICAL TUBE INFO:|
|Optical Design||Rowe-Ackermann Schmidt Astrograph|
|Focal Length||620mm (24.4″)|
|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 Length||838.2mm (33″)|
|Optical Tube Diameter||330.2mm (13″)|
|Focuser||FeatherTouch microfocuser, coarse and fine focus|
|Optical Tube Weight||43 lbs (19.5 kg)|
|Other Features||Ventilation fan, dual dovetail mounting bars, mirror support clutches|
|Included items||42mm (1.65”) T-thread camera adapter, 48mm (1.89”) camera adapter, fan battery pack|
|Dovetail||CGE Dovetail Bar|
|Mount Type||Computerised Equatorial|
|Instrument load capacity||75 lbs (34 kg)|
|Height adjustment range (includes mount and tripod)||908.05mm – 1339.85mm (35.75″ – 52.75″)|
|Tripod Leg Diameter||69.85mm (2.75″) Steel tripod with graduated markings on lower section|
|Latitude adjustment range||3° – 65°|
|Mount Head Weight||52.6 lbs (23.8 kg)|
|Tripod Weight||46.2 lbs (21 kg)|
|Weight of Counterweights||1 x 22 lbs|
|Slew Speeds||9 slew speeds – max speed 3°/second|
|Tracking Rates||Sidereal, Solar and Lunar|
|Tracking Modes||EQ North & EQ South|
|Dovetail Compatibility||Dual saddle plates (Vixen and CGE saddle)|
|Number of Auxiliary ports||4 Aux ports (Hand Control can use any Aux port, 2 are located near the dovetail saddle for optional accessories)|
|Autoguide port||Yes, 2 ports (one is located near the dovetail saddle)|
|USB Port||Yes, input for Mount and Hand Control|
|Power Requirements||12V DC, 3 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||PWI Telescope Control Software, Celestron’s Starry Night Special Edition Software, SkyPortal App|
|Total Kit Weight||163.8 lbs (74.3 kg)|
|Included Items||CGX-L Equatorial Head | CGX-L Tripod | Accessory Tray | 1 x 22 lb counterweight | NexStar+ Hand Control | DC Power Cable (item# 18769) | 8mm Allen wrench (contained in rear carry handle)|