The standard screw mounting for 2/3" and 1" camera lenses. The distance from the flange surface to the focal point is 17.526mm. A C-Mount lens can be used on a camera with a CS-Mount by adding adapter ring to reduce the distance to 12.5mm.
C-MOUNT
Meaning of C-MOUNT in English
Film and video English vocabulary. Английский словарь фильмов и видео. 2012