Miniature telephoto for the Pentax Auto 110 SLR, 135mm equivalent from the world's smallest interchangeable lens system.
The Pentax 110 70mm f/2.8 is an interchangeable telephoto lens for the Pentax Auto 110, the world's smallest interchangeable lens SLR system that used 110 cartridge film. The 70mm focal length provides a telephoto perspective on the tiny 13x17mm 110 format, roughly equivalent to 135mm on 35mm film.
The miniature lens maintains the Pentax Auto 110 system's remarkable size advantage — the entire SLR system fits in a coat pocket. The f/2.8 aperture is fast for the 110 format, providing adequate brightness and some depth-of-field control on the small negatives.
Build quality matches the Pentax Auto 110 system standard — precision miniature engineering that demonstrates remarkable optical and mechanical quality at incredibly small dimensions. The lens feels like a quality miniature rather than a toy, reflecting Pentax's serious engineering approach.
The Pentax 110 70mm f/2.8 has collector value as part of the unique Auto 110 interchangeable lens SLR system. The system's extraordinary miniaturisation represents a fascinating chapter in camera design history, though practical photography is limited by the tiny 110 film format.