This fast, wide-field f/2.2 system allows for shorter exposure times compared to traditional f/10 astroimaging, without sacrificing resolution. Common camera adapters (T-thread and M48) included for easy attachment to popular CCD and DSLR camerasĬapturing impressive deep-sky astroimages is easier than ever with Celestron’s Rowe-Ackermann Schmidt Astrograph (RASA) V2, the perfect companion to today’s top DSLR or astronomical CCD cameras.Integrated air-cooling system features a quiet, high-output 12V MagLev fan and vents with mesh filters to prevent dust ingress.New Ultra-Stable Focus System (USFS) minimizes focus shift and mirror flop.Large 43.3mm optimized image circle maintains pinpoint stars to the far corners of even the largest astroimaging sensors, while the usable field extends even further to 52mm for larger format sensors.Fast, wide-field 11” f/2.2 optical design with rare-earth glass for images free of false color, coma, and field curvature.