
M12 and S-mount lenses for industrial cameras
How to use a M12 lens with an industrial C-mount camera?
M12 lenses are not directly compatible with C-mount cameras. M12 lenses are designed for board-level cameras with an M12 mount, while C-mount lenses are designed for industrial cameras. There are two key differences:
- Mount diameter: An adapter can address the difference in mount diameter between M12 and C-mount.
- Flange focal distance (FFD): C-mount lenses have a fixed FFD (distance between the lens mount and the image sensor). M12 lenses, however, have a variable FFD that changes with focus setting. This variation can cause M12 lenses to hit the protective glass on C-mount cameras, preventing proper focus.
To address this incompatibility, VA Imaging has invented a special C-mount to M12 mount adapter to easily use M12 lenses on a C-mount camera. This adapter is compatible with all M12 lenses VA Imaging sells. Additionally, this adapter can also be mounted on a CS-mount camera, making it a very universal adapter.