127 film
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127 is a film format for still photography. The image format is usually a square 4 x 4 cm, but rectangular 4 x 3 cmd and 4 x 6 cm are also standard. Oddly enough, Foth used 36 x 24 mm for their first Derby model.
127 is a typical roll film. Frame number markings for the 4x4 and 4x6 image formats are printed on the backing paper, while 4x3 camera's typically have two frame counter windows, exposing the left and right half's of the 4x6 frame.
Using the square format, there are 12 exposures, the rectangulars give 16 and 8, respectively.
The format was introduced by Kodak in 1912, along with the Vest Pocket Kodak folding camera, as a compact alternative to the 120. The folding 127s were in fact smaller than most 135 cameras today.
The format was mainly used for amateur cameras, with the Exakta SLR, the Baby Rolleiflex and the Yashica 44 TLR as possible exceptions.
Kodak stopped producing 127 film in 1995. Fotokemika dd of Croatia is the only remaining manufacturers of 127 film, which it sells under its own "Efke" brand as well as custom-packaging for other sellers.
External links
Someone who has built a device to trim 120 film to 127 format