This vintage Cinor projection lens was made by Som Berthiot in Paris, a French manufacturer of optical equipment. It has a focal length of 24mm and a maximum aperture of f/1.5.
Originally designed for projection, this compact optic may also be of interest for creative photography projects and experimental lens adaptations. With suitable mounting and the correct distance from the sensor, it can be used to achieve distinctive image results. Compatibility depends on the camera and adapter used.
An interesting piece for collectors of French optics and photographers who enjoy experimenting with vintage lenses.