What is a c-mount lens?
C-mount is a lens with a threaded mount. The threads have a major diameter of 1″ and a pitch of 32 threads per inch. The flange focal distance is 0.69″. C-mount lenses are used extensively with closed-circuit televisions, thus the lenses are readily available. Most machine vision sensors use a c-mount lens, although some use a slightly different standard, the cs-mount. The cs-mount lens is dimensionally the same as the c-mount except for the flange-to-focal plane distance (~0.49″ for the cs-mount).
