CGX 11" RASA V211 f 2. 2 Rowe Ackermann Schmidt Astrograph (RASA) V2 uses rare earth glass for images free of false color, coma, and field curvature Heavy duty CGX computerized equatorial mount with 55 lb payload capacity Description Optical Performance The RASA 11 V2 features optics with 4 element rare earth glass for images free of false color and aberrations like coma and field curvature. The optical quality and spot size across the entire image circle are