This updated second-generation?Celestron 11" f/2.2 Rowe-Ackermann Schmidt Astrograph v.2 builds on the success and performance of its earlier iteration with the addition of an improved Ultra-Stable Focus System that minimizes both focus shift and mirror flop to improve image quality.





The RASA system is specifically designed for astrophotography and astroimaging with a large 11" aperture and fast f/2.2 focal ratio. The optical tube assembly (OTA) is being offered by itself without a mount and comes with a Celestron CGE-style dovetail plate for use on mounts that accept the larger Losmandy-size mounting system.





Using 4-element rare-earth optical glass lenses ensures accurate color rendition and eliminates aberrations such as coma and field curvatures. The 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 12VDC 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 without vignetting, while a fast focal ratio reduces exposure times and background noise without sacrificing image quality and gives you more time for multiple shots of the same object with different filters for later post processing and stacking. 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 separately if required.Celestron's CGX GoTo EQ Mount Head improves on their venerable CGEM platform to provide users with a heavy-duty research-quality mount for large optical tube assemblies (OTAs), accessories, and imaging rigs. Engineered to carry a 55-pound payload, it has high-torque motors and heavy-duty belt-drive system to improve tracking stability and reduce backlash which enable it to smoothly and accurately track near- and deep-sky objects for long periods of time. Its Vixen/Losmandy dual dovetail saddle makes the mount compatible with most plates in use today.





The brain of the CGX EQ is the NexStar computer controller. Equipped with a database of 40,000 objects, including the planets, stars, nebulae, galaxies, and the complete Messier catalog, it can also be programmed with up to 100 user-defined objects and filters for custom lists. Its intuitive menu-driven user interface allows you to observe the heavens with nine slew speeds and three tracking rates, plus anti-backlash compensation and Permanent Periodic Error Correction (PPEC) for smoother movements in the motors and improved tracking over time. Features such as guided tours, extended information on 200 popular objects, and multiple alignment options make the NexStar controller easy to use for new users and experienced stargazers.Designed to support their CGX equatorial mount, the Celestron CGX Tripod has large 2" diameter legs to provide a solid and sturdy platform for the mount head plus an optical tube assembly and accessories. To accommodate a variety of users, optical tube styles, and viewing positions, the legs can adjust from 47.25 to 77.5" and terminate with spikes to provide solid footing. Graduated markings on the lower leg sections enable you to accurately repeat settings, saving setup and leveling time if you observe from the same location every night. Adding greater stability and vibration suppression, the center accessory tray acts as a leg spreader to lock them in-place while providing a convenient place to keep eyepieces, filters, or your phone safe and close to hand. Two 11-pound counterweights come in the box to assist in properly balancing your OTA on the mount head.Use the Celestron 11 lb Counterweight by itself or with other weights to balance your OTA and accessories on Celestron CG-5, CGEM, CG-4 mounts; or any similar mount with a 0.75" (19mm) center bore hole. A large thumbscrew allows you to lock the weight anywhere along the counterweight shaft to allow for precise balance.