This standard specifies the dimensions required for mechanical and optical interchangeability of lenses for 16-mm and 8-mm motion-picture cameras. For 16-mm cameras with threaded lens mounts, threads having a nominal major diameter of 1-in are often specified. Similarly, for 8-mm motion-picture cameras, threads having a nominal major diameter of 5/8 in are in common use. This standard does not apply to continuous type motion-picture cameras because of the type of optical system employed in those cameras.
