8 mm film
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8 mm film is a motion picture film format in which the filmstrip is eight millimeters wide. It exists in two main versions: regular or standard 8 mm (the subject of this article) and Super 8. There are also two other varieties of Super 8 which require different cameras but which produce a final film with the same dimensions.
Standard 8
The standard 8 mm film format was developed by the Eastman Kodak company during the Great Depression and released on the market in 1932 to create a home movie format less expensive than 16 mm. The film spools actually contain a 16 mm film with twice as many perforations along each edge than normal 16 mm film, which is only exposed along half of its width. When the film reaches its end in the takeup spool, the camera is opened and the spools in the camera are flipped and swapped (the design of the spool hole ensures that this happens properly) and the same film is exposed along the side of the film left unexposed on the first loading. During processing, the film is split down the middle, resulting in two lengths of 8 mm film, each with a single row of perforations along one edge, so fitting four times as many frames in the same amount of 16 mm film. Because the spool was reversed after filming on one side to allow filming on the other side the format was sometime called Double 8. The framesize of 8 mm is 4,8 x 3,5 mm and 1 m film contains 264 pictures. Normally Double8 is filmed at 16 frame/s.
Common length film spools allowed to film about 3 to 4 min at 12, 15, 16 and 18 frames per second.
Kodak ceased producing standard 8 mm film in the early 1990s. Black and white 8 mm film is still manufactured in the Czech Republic, and several companies buy bulk quantities of 16 mm film to make regular 8 mm by re-perforating the stock, cutting it into 25 foot (7.6 m) lengths, and collecting it into special standard 8 mm spools which they then sell. Re-perforation requires special equipment. Some specialists also produce super 8 mm film from exisiting 16 mm, or even 35 mm film stock.
Super 8
In 1965, Super-8 film was released and was quickly adopted by the amateur film-maker. It featured a better quality image, and was easier to use mainly due to a cartridge-loading system which did not require re-loading halfway through.
There are several subtypes of Super-8 film all of which have the same final film dimensions, but the Kodak system was by far the most popular.de:8-mm-Film it:8 millimetri nl:8-mm-film