A rotary disc shutter is a type of shutter. It is notably used in motion picture cameras. Rotary shutters are semicircular discs that spin in front of the film gate, alternately allowing light from th

The Olympus Pen F, Pen FT and Pen FV are very similar half-frame 35 mm single-lens reflex cameras with interchangeable lenses produced by Olympus of Japan between 1963-1966, 1966-1972 and 1967-1970.