Three M12 lenses for board or CCTV cameras

The S-mount is a standard lens mount used in various surveillance

CCTV Closed-circuit television (CCTV), also known as video surveillance, is the use of closed-circuit television cameras to transmit a signal to a specific place on a limited set of monitors. It differs from broadcast television in that the signa ...

cameras and

webcams A webcam is a video camera which is designed to record or stream to a computer or computer network. They are primarily used in Videotelephony, video telephony, live streaming and social media, and Closed-circuit television, security. Webcams can b ...

. It uses a male metric M12 thread with 0.5 mm pitch on the lens and a corresponding female thread on the lens mount. S-mount lenses are often called "M12 lenses" due to the

ISO metric screw thread The ISO metric screw thread is the most commonly used type of general-purpose screw thread worldwide. They were one of the first international standards agreed when the International Organization for Standardization (ISO) was set up in 1947. T ...

designation of the lens's thread, M12 × 0.5. Because the lens mounts are usually attached directly to the

PCB PCB may refer to: Science and technology * Polychlorinated biphenyl, an organic chlorine compound, now recognized as an environmental toxin and classified as a persistent organic pollutant * Printed circuit board, a board used in electronics * P ...

of the sensor, they are often called "board lenses". The supported sensor formats range from smaller than -inch type up to 1 inch having, a 16 mm diagonal sensor. The lenses lack an iris control. S-mount lenses do not have a flange and therefore there is no fixed lens to sensor distance and they must be adjusted to focus. Due to the small size of the lens barrel, performance is somewhat limited compared to larger lenses and most S-mount lenses are relatively slow ( and slower). High-end CCTV cameras generally use C- or CS-mount lenses, where much faster apertures like are common.

References

{{reflist Lens mounts Webcams

See also

References