C-mount lens mount explained

What this name establishes

The Imaging Source specifies a 1-inch, 32-TPI thread and 17.526 mm flange focal distance; CS-mount shares the thread but uses a shorter 12.526 mm distance It establishes the system family; it does not by itself certify every electronic function or guarantee safe clearance for adapted lenses.

C and CS share a thread, not the same register

The Imaging Source explains that a C-mount lens can use a 5 mm spacer on a CS-mount camera. The reverse does not follow from the matching thread. Sensor size and the lens image circle must also be checked for each machine-vision camera.

Before adapting a C-mount lens

Confirm the camera’s actual C or CS designation, the lens’s image-circle rating, physical rear clearance and the exact spacer or adapter. A screw thread that starts turning is not proof that the flange distance or sensor coverage is correct.

How to verify a combination

1. Read the exact mount on the camera and lens.
2. Check the maker’s compatibility list for that model.
3. If an adapter is needed, confirm the direction and lens exclusions.
4. Check crop, AF, aperture and stabilization separately.

Published models

0 published source-linked model records use this mount label. This sample does not turn every cross-brand pairing into a confirmed combination.

No exact profile has cleared the source check for this category yet. Use the official maker resource and verify the complete model designation.

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