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.

The Pentax Auto 110 and Pentax Auto 110 Super were fully automatic single-lens reflex cameras manufactured by Asahi Pentax for use with Kodak 110 film cartridges. The Auto 110 was introduced with thre