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| Camera Formats | |
| Camera formats are based on the size of the film frame | |
| Advance Photo System (APS) | The smallest and the newest format luanched in 1996. APS has a film frame size of 17x30mm |
| 35mm | The most popular format and the film size upon which the majority of the camera systems are based. Produces 24x36mm negatives and slides |
| Medium Formats | There are a range of medium format cameras that use roll film known as 120. The most popular formats are 6x4.5cm (known as 645), 6x6cm (2 1/4 inch square) and 6x7cm. Depending on the camera, you get a different number of frames per roll, ranging from 10 to 15. Medium format cameras offers a considerably larger negative ot transperency than 35mm, an important consideration if very large prints are required. |
| Panoramic | Available in 35mm and medium format. A true panoramic camera has a format ratio of 1:3 (ie the film is three times as wide as it high) Two 35mm frames side by side would be panoramic. In medium format a 6x12cm panoramic camera give six frames per roll. a 6x17cm panoramic camera produces only four frames per roll, that are almost three times as wide as they are high. |
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| http://www.oculartravel.com/pixworld/camera_formats.asp |