The 105 spool has a much wider flange, similar to the 116 spool, while the 117 spool's flange is slightly narrower than the 120. These formats used the same width film as 120 film, but with slightly different spools. The 117 format was introduced by Kodak in 1900 for their first Brownie camera, the No.1 Brownie, 6×6 cm format. The 105 format was introduced by Kodak in 1898 for their first folding camera and was the original 6×9 cm format roll film. Original 120 spool (left) versus a 620 spool The number '6' in general, and the word 'six' are also commonly used in naming cameras e.g. Most of these cameras use lenses intended for large format cameras for simplicity of construction.Ĭameras using 120 film will often combine the numbers of the frame size in the name e.g. The wide 6×12, 6×17, and 6×24 cm frames are produced by special-purpose panoramic cameras. 6×4.5 is the smallest and least expensive roll-film frame size. The 6×7 frame enlarges almost exactly to 8×10 inch paper, for which reason its proponents call it "ideal format". The 6×9 frame has the same aspect ratio as the standard 24×36 mm frame of 135 film.
† User selectable on newer cameras, if a roll is only partially used then a "kink" may appear in the film where the roll touches rollers in a film back magazine and this may end up on a frame this is not a problem when 15 exposures are used as the gaps between exposed frames is larger, nor if the camera is not used intermittently. Pentax 6×7 SLR camera with perspective control lens
Mamiya 7 ii for sale iso#
Earlier editions of ISO 732 also provided international standards for the 127 and 620 film formats. The specifications for 120 and 220 film are defined in the ISO 732 standard. the Pentax 6x7, Mamiya C220 or Mamiya C330) while others will require different film backs e.g. Some cameras capable of using both 120 and 220 film will have a two position adjustment of the pressure plate (e.g. Also, since the film alone is thinner than a film with a backing paper, a special pressure plate may be required to achieve optimal focus if the film is registered against its back side. Because of this, 220 film cannot be used in cameras that rely on reading frame numbers through a red window. This results in a longer film on the same spool, but there are no printed frame numbers. Unlike 120 film, however, there is no backing paper behind the film itself, just a leader and a trailer. The 220 format was introduced in 1965 and is the same width as 120 film, but with about double the length of film and thus twice the number of possible exposures per roll. Frame number markings for three standard image formats (6×4.5, 6×6, and 6×9 see below) are printed on the backing paper. The backing paper protects the film while it is wound on the spool, with enough extra length to allow loading and unloading the roll in daylight without exposing any of the film. The film is attached to a piece of backing paper longer and slightly wider than the film. However, some films may be as short as 760 millimetres (30 in). The length of the film is nominally between 820 millimetres (32 in) and 850 millimetres (33 in), according to the ISO 732:2000 standard. The film is held in an open spool originally made of wood with metal flanges, later with all-metal, and finally with all-plastic. Most modern films made today are roughly 61 mm (2.4 inches) wide. The 120 film format is a roll film which is nominally between 60.7 mm and 61.7 mm wide.
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