11" ROWE-ACKERMANN SCHMIDT ASTROGRAPH

11-inch f/2.2 optical design with rare-earth glass for images free of false color, coma, and field curvature
43.3 mm optimized image circle maintains pinpoint stars to the far corners of even the largest astroimaging sensors, while the usable field extends even further to 52 mm for larger format sensors.
Custom engineered linear brass focuser bearing reduces image shift, while dual-speed 10:1 FeatherTouch Micro Focus Knob provides the most precise focusing
Quiet, high-output 12V MagLev fan reduces cooldown time and blocks dust
Common camera adapters (T-thread and M48) included for easy attachment to popular CCD and DSLR cameras