The S-mount ciné lens mount was originally developed by

Kodak The Eastman Kodak Company (referred to simply as Kodak ) is an American public company that produces various products related to its historic basis in analogue photography. The company is headquartered in Rochester, New York, and is incorpor ...

. It was a mixture of bayonet and threaded mount. The S-mount was just used with a few

Ciné-Kodak The Ciné-Kodak was the first 16mm camera, introduced in 1923 by the Eastman Kodak Company. It was intended to be used for home movie making. History The first prototype was a leather covered rectangular wooden box, which evolved into a final cas ...

cameras, especially the Ciné-Kodak Special II from 1948-1961.

References

Lens mounts Film and video technology Kodak {{film-tech-stub