The S-mount is a standard lens mount used in various surveillance CCTV cameras and webcams. It uses a male metric M12 thread with 0.5 mm pitch on the lens and a corresponding female thread on the lens
Three S-mount lenses with different focal lengths (left to right: 16 mm, 6 mm and 8 mm)
A lens board is a stiff, opaque board with a hole in the center, onto which a lens is mounted, so that the lens can be attached easily to the front of a view camera or to the bottom of a photographic
Cambo lens board with Copal #1
135mm Optar lens mounted on a #0 Speed Graphic lens board