Editing 135 film (section)

=== Image format ===
[[file:135 film perforations.jpg|thumb|135 frame and perforations]]
[[file:Half-Frame 4442.jpg|thumb|Half-frame negatives (left and right) with standard 35&nbsp;mm (centre)]]

The term ''135 format'' usually refers to a 24×36&nbsp;mm [[film format]], commonly known as 35&nbsp;mm format. The 24×36&nbsp;mm format is common to higher-end digital [[image sensor]]s, where it is typically referred to as ''full-frame'' format.

On 135 film, the typical cameras produce a frame where the longer dimension of the 24×36&nbsp;mm frame runs parallel to the length of the film. The perforation size and pitch are according to the standard specification [[Film perforations#KS/P|KS-1870]]. For each frame, the film advances 8 perforations. This is specified as 38.00&nbsp;mm. This allows for 2&nbsp;mm gaps between frames. Camera models typically have different locations for the sprocket which advances the film. Therefore, each camera model's frame may vary in position relative to the perforations. The film is approximately 0.14&nbsp;mm thick.

Other image formats have been applied to 135 film, such as the [[Half-frame camera|half-frame]] format of 18×24&nbsp;mm which earned some popularity in the 1960s, and the 24×24&nbsp;mm of the [[Robot camera]]s. The successful range of [[Olympus Pen F]] cameras utilized the smaller half-frame size, allowing the design of a very compact SLR camera. Unusual formats include the 24×32&nbsp;mm and 24×34&nbsp;mm on the early Nikon [[rangefinder camera|rangefinders]], and 24×23&nbsp;mm for use with some [[stereo camera]]s. In 1967, the Soviet [[Krasnogorskiy Zavod|KMZ factory]] introduced a 24×58&nbsp;mm [[panoramic format]] with its Horizont camera (descendants of which are called, in the Roman alphabet, [[Horizon (camera)|Horizon]]). In 1998, [[Hasselblad]] and [[Fujifilm|Fuji]] introduced a 24×65&nbsp;mm panoramic format with their XPan/TX-1 camera. There is also a 21×14&nbsp;mm format used by Tessina subminiature camera.