Security Vision offers C/CS Mount Rings. Security Vision manufactures AC power converters for cameras, DC power converters for cameras, RFID cards and readers, speed diallers, heat sensors, pan tilt units, speed domes, etc. The C/CS Mount Rings are used in C/CS mount camera to precise back focal length to match the lens that needs to be mounted. The C Mount ring has a thickness of 17.526mm and CS mount ring shall have a thickness of 12.5mm.