Half-frame camera


A half-frame camera is a camera using a film format at half the usual exposure format. A common variety is the 18×24 mm format on regular 135 film. It is the normal exposure format on 35mm movie cameras. For still cameras using the 35mm film, the usual format is 24×36 mm, so still cameras taking 18×24 mm exposures are called half-frame cameras.
There was a vogue of half-frame cameras in the 1960s, mainly from Japan, originating with the Olympus Pen models. It allowed for a very compact camera, using commonly available film, unlike other subminiatures that used exotic films.
This vogue ended when cameras like the Rollei 35 or the Olympus XA showed that it was possible to make cameras as small as the half-frame ones, but taking 24×36 mm exposures.
With a half-frame camera, twice as many pictures will fit onto a standard roll of film. For example, 72 exposures on a 36-exposure roll, 40 on a 20-exposure one, and so on. This reduces the film cost per exposure. Color negative film was expensive during the heyday of the half-frame camera, and the use of half-frame cameras could save money.
The exposures have a vertical orientation as opposed to the horizontal orientation of a 35mm SLR or rangefinder, with the exception of cameras whose film mechanisms run vertically.
The most advanced half-frame camera that was designed as such from the start is the Yashica Samurai single lens reflex.
For some specific needs, there were cameras originally designed for full-frame pictures that were produced or custom modified in very small series as half-frame models, for example some Leica, Nikon or Robot rangefinders, and some Alpa or Minolta SLRs. These are mainly of interest as collectibles.

Gallery of photographs taken with half-frame cameras