The CCTV Board Lens mount used in board based surveillance CCTV cameras and webcams. It uses a screw on thread size known as M12 with 0.5 mm pitch on the lens and a corresponding female thread on the lens mount. This is also known as a S-mount lens. Because the lens mounts are usually attached directly to the PCB of the sensor, the standard is often called “board lens”. The supported sensor formats range from the smallest 1/6-inch type to the largest 2/3-inch having an 11mm diagonal sensor. The lens mount is usually made of plastic and the lenses lack an iris control. These lenses do not have a depth control and therefore there is no fixed lens to sensor distance and they must be adjusted to focus.