Website Template
From Wikipedia, the free encyclopedia

135 film. The film is 35 mm wide. Each image is 36x24 mm.

135 (ISO 1007) is a film format for still photography. Introduced in its modern form in 1934 it quickly grew in popularity, surpassing 120 film by the late 1960s to become the most popular photographic film format. Despite competition from formats such as 110 and APS, it remains so today.

The film itself has the same dimensions and perforations as 35 mm movie print film but is enclosed in a light-tight single-spool metal cassette to allow cameras to be loaded in daylight. The film is clipped or taped to a spool and exits via a velvet-covered slot. The end of the film is cut on one side to form a leader, which is to be inserted into a corresponding slot in the camera take-up spool.

Since the 1980s, film cassettes have been marked with a DX encoding pattern for automatically setting the camera to use the correct sensitivity value for the film. Different films are sensitive to light at different degrees, this film speed is standardised by ISO. Common film speeds for consumers are ISO 100/21° through ISO 800/30°, although films with much greater and much less sensitivity are available, and are generally for professional use.