Another widely used camera mount is CS-mount. CS-mount lenses are often used in surveillance cameras, and sometimes in low-cost imaging applications. CS-mount lenses have the same thread pitch as C-mount lenses, but the flange focal distance is 12.5 mm.

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Using a C-CS mount adapter, C-mount lenses can be used on CS camera mounts. Conversely, this does not work, so using CS-mount lenses on C-mount cameras is not possible.

The standard mount for imaging cameras is C-mount with a back focus of 17.526mm. The flange focal distance is the distance between the last surface of the lens and the sensor of the camera. C-Mount also has the thread pitch of 1⁄32 inch and the diameter of 1 inch.