Information About120 Film |
| CATEGORIES ABOUT 120 FILM | |
| film formats | |
| iso standards | |
| film 120 | |
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120 is a Film Format for still Photography introduced by Kodak for their '' Brownie No. 2'' in 1901 . It was originally intended for amateur photography but was later superseded in this role by 135 Film . It survives to this day as the only remaining Medium Format , popular with professionals and amateur enthusiasts. The 120 format is typical of Roll Film . The Bobbin was originally made of wood with Metal flanges, later all metal, and finally Plastic . Frame number markings for the three standard image formats are printed on the backing paper. The film is 72 cm long. FRAME SIZES The 120 film allows several frame sizes, the most common being the 6 × 6 cm (120 square format), or more exactly 56 × 56 mm. It is sometimes referred to as 2¼ × 2¼ inch film, though this is less common. Special-purpose panoramic cameras produce 6 × 12 or 6 × 17 cm exposures. Both 6 × 7 and 6 × 4.5 enlarge almost exactly to 8 × 10 paper, for which reason their proponents call them "ideal formats". The ''645 format'' (6 × 4.5) in particular is the smallest, lightest, least expensive, and most popular roll-film design. Due to better control of frame space, modern ''645'' format cameras get 16 exposures per roll of ''120''. OTHER SIMILAR ROLL FILMS The 220 format was introduced in 1965 and is the same format as 120 film, but with double length (144 cm) film and thus twice the number of exposures per roll. Unlike 120 film, there is no backing paper behind the film itself, just a leader and a trailer. This results in a longer film on the same spool, but as a result, there are no printed frame numbers, and moreover, it cannot be used in unmodified old cameras that have the red window as frame indicator. Also, since the film alone is thinner than a film with a backing paper, depending on camera type a special Pressure Plate may be required to achieve optimal Focus . Some cameras capable of using both 120 and 220 film will have a two position adjustment of the pressure plate while others will require different film backs. The 620 format was introduced by Kodak in 1931 as an intended alternative to the 120 format and is essentially the same film on a slightly different all metal bobbin (the 120 bobbin was made of wood at that time):
The 620 format was discontinued in 1995, but some photographers respool 120 film onto a 620 bobbin in the darkroom to use their 620 cameras. The 105 format was introduced by Kodak in 1898 for their first Folding Camera and was the original 6 × 9 cm format roll film. The '''117''' format was introduced by Kodak in 1900 for their first Brownie camera, 6 × 6 cm format. These formats used the same width film as 120 film, but with slightly different bobbins. |
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