Celestron CGX 8" Rowe-Ackermann Schmidt Astrograph (RASA)

Capture spectacular wide-field deep-sky images in seconds with the Celestron 8" Rowe-Ackermann Schmidt Astrograph (RASA), a portable astrograph designed specifically for fast, high-resolution astrophotography. With an exceptionally fast f/2.0 focal ratio and Celestron’s patented optical design, the 8" RASA is an ideal imaging platform for modern color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras. The RASA's fast focal ratio allows you to collect light rapidly, making it possible to capture detailed deep-sky images in a fraction of the time required by traditional longer-focal-length instruments. Its optical design produces sharp, detailed images with a flat field and minimal optical aberrations, delivering razor-sharp stars across a wide field of view. Under many imaging conditions, its speed can even eliminate the need for an autoguider. At just 17 pounds, the 8" RASA is exceptionally portable for a dedicated astrograph, making it easy to transport to remote dark-sky locations. It provides an accessible way to experience the performance advantages of the RASA design while offering a more portable and affordable alternative to the acclaimed RASA 11. The 8" RASA incorporates several thoughtfully designed features inherited from its larger counterpart, including an integrated air-cooling system, internal filter mount, and sturdy CGE dovetail mounting bar. These features make it a practical and purpose-built imaging platform for astrophotographers looking for a streamlined setup. Designed exclusively for astrophotography, the 8" RASA cannot be used for visual observing. Its prime-focus focal plane is positioned at the front of the optical system, preventing the use of a traditional eyepiece.

Features

• Flat-field free of optical aberrations like field curvature, coma, astigmatism and chromatic aberration across an entire APS-C sensor.
• Unlike the larger RASAs that work with DSLR and large CCD cameras, the 8” model was designed with color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras in mind. The telescope does not work with standard DSLR cameras.
• Ultra-Stable Focus System – precision linear ball bearing virtually eliminates image shift.
• Internal filter mount – seamlessly accommodates a Light Pollution Imaging Filter into the optical path.
• Performs over a wider spectral range than most telescopes, from 400-800 nm, so more of the light passing through the astrograph is in sharp focus.
• The CGX, with its 55 lb load capacity, is Celestron’s most innovative, state-of-the art, computerized equatorial mount to date, and provides a very sturdy and rigid platform for the fully-loaded RASA 8.
• The drive system utilizes low cog DC Servo motors with integrated optical encoders, belt and pulley motor connection, spring-loaded steel worm gears supported by precision sealed bearings, and brass worm wheels for smooth, accurate slewing and tracking performance with little backlash.
• Fully remote imaging capable, with optical limit switches, home sensors, through-mount cabling, and hard stops.
• Included Celestron PWI software allows direct computer control via USB 2.0 connection.
• Proven NexStar+ computerized telescope control technology supports functions to address imagers’ needs, such as All-Star Polar Alignment, Permanent Periodic Error Correction (PPEC), and adjustable tracking through meridian.