M12x0.5 — S-mount
Miniature lens mounting thread with a nominal diameter of 12 mm and a pitch of 0.5 mm. Commonly known as S-mount or board lens mount, it is widely used in compact CCTV and embedded imaging systems.
Equipment and systems: S-mount board-camera lenses and M12x0.5 lens holders.
Examples include Lensation S-mount lenses, Commonlands M12 lenses, and Basler dart cameras equipped with an S-mount lens holder.
Compatibility and limitations: Not interchangeable with M12x0.75.
Matching threads alone do not guarantee that a lens will focus correctly or cover the camera sensor. Check the lens back focal distance, sensor format, holder depth and rear-element clearance.
S-mount does not specify a single flange focal distance.
Note: Focus is commonly adjusted by screwing the lens into or out of its holder. Secure the final position with a suitable locking method and avoid allowing the rear of the lens to contact the sensor or protective glass.
