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APS was mainly used for point and shoot amateur cameras, although some SLR systems were also created: Canon EOS IX, Minolta Vectis, Nikon Pronea with Nikon IX lenses. The format was introduced in 1996 by Kodak, Fujifilm, Minolta, Nikon, Canon and others. To facilitate automatic processing of film, a unique DX number is assigned to the different types of film.ĪPS film is typically processed by using a small machine to transfer the exposed APS film from the original cartridge to a reloadable one, then re-attached to the original cartridge and rewound using another machine after processing. This ID was designed to be an additional convenience both for the photoprocessor (who can easily match each strip of processed film with its cartridge, and each cartridge to a particular customer's order) and for the consumer, who can easily locate the correct cartridge if reprints are desired. This ID is usually printed on the back of every individual print.

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For identification, every roll of APS film has a six-digit ID code on the label, which is also stored magnetically and is visible on either end of the processed negative. Unlike 135 film, processed ( developed) APS film is stored in the original cartridge. Magnetic IX caused some problems for photo processors, who found their magnetic reading heads had to be cleaned frequently, or that their equipment's ability to print this information was limited. Most cameras with magnetic IX automatically record the exposure date and time on the magnetic layer, with more advanced models allowing the user to specify a predetermined caption to be printed on the photo or record the exposure settings, as well as determine print aspect ratio. Magnetic IX is used in the more expensive cameras and allows for more information exchange. This method is limited to determining the print aspect ratio of the finished print. Optical IX is employed by less expensive cameras and disposable cameras, and employs a light source to expose a small section of the film, outside of the image negative area. Two methods for storing information on the film are employed: 'magnetic IX' and 'optical IX'. This information can be read by the photo printing equipment to determine the print aspect ratio, print information on the back (or, rarely, the front) of the photograph, or to improve print quality. This information exchange is most commonly used for print aspect ratio, but can also be used to record the date and time that the photograph was taken, store a caption, and record exposure data such as shutter speed and aperture setting.

Cross sign: Fully exposed but not processedĪdditionally, a tab on this end of the cartridge indicates that the cartridge has been processed.Ī major distinction of APS film is the ability to record information other than the image.

Numbered symbols (called 'visual indicators') on the cartridge end indicate the status: The camera handles winding and rewinding automatically, to the extent that partially exposed films can, in certain cameras, be removed and used later. The film surface has a transparent magnetic coating, and the camera uses this information exchange (IX) system for recording information about each exposure. It is available in 40, 25 and 15 exposure lengths. The slot is protected by a lightproof door. The basic diameter is 21 mm, while it measures 30 mm at the slot where the film exits. The film is on a polyethylene naphthalate (PEN) base, and is housed in a single-spool 39 mm long plastic cartridge.

In the absence of an operator-specified format, the machine printing an APS roll will use these indicators to determine the output format of each print.

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Most APS cameras (with the exception of some disposable cameras) can record all three formats the format selection is indicated on the film by a series of exposed squares alongside the image area or recorded on the magnetic coating depending on the camera. The 'C' format has an equivalent aspect ratio to a 135 film image.

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The full image is recorded on the film, and an image recorded in one aspect ratio can be reprinted in another. The 'C' and 'P' formats are formed by cropping the 30.2 × 16.7 mm 'High Definition' image.

P for ' Panoramic' (30.2 × 9.5 mm aspect ratio 3:1 4×11' print) (1.36 crop compared to 36x24mm full frame).C for 'Classic' (25.1 × 16.7 mm aspect ratio 3:2 4×6' print) (1.44 crop compared to 36x24mm full frame).H for 'High Definition' (30.2 × 16.7 mm aspect ratio 16:9 4×7' print) (1.25 crop compared to 36x24mm full frame).The film is 24 mm wide, and has three image formats: A typical low-end, fixed-focus APS compact camera