CS mount
The CS mount is the C-mount derived, standardized threaded lens mount for camera objective in the professional field.
The diameter is 1 inch , the thread pitch is 1/32 inch. The support dimension, i.e. the distance between the flange of the lens thread and the image plane (the image sensor ), is 12.5 mm (in comparison: C-Mount : 17.526 mm).
With an intermediate ring of 5.026 mm you can convert a C-mount lens into a CS-mount lens or a CS-mount camera into a C-mount camera.