Advanced VX 800 RASA AstrographThe RASA is an advanced astrograph designed for experienced imagers. Do not select a RASA as your first astrophotography telescope! Rowe Ackermann Schmidt Optical Design 8 f 2. 2 flat field imaging system with rare earth glass for outstanding images free of optical defects 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