| The images on photographic film are made up of millions of tiny light sensitive grains. |
| A slower film (ISO 25, 50, 64, 100) has smaller / finer grains and produces a better qualtiy image when printed or scanned.. |
| Faster films (ISO 200, 400 and higher) have larger grains and produce more grainy photographic prints or scans. |
| Generally slide films (also known as transparencies or diapositives) create a better quality image than negative films at any given ISO rating. |
| If a film image is scanned at too high a setting for the film's quality then these grains become obvious and ruin the scanned image. |
| The secret to creating the best possible digital image is to scan at the optimum scanner setting for the film in question. |
| Slow slide films such as Kodak Kodachrome 25, Kodachrome 64, Fujichrome Velvia 50 |
5400 dpi scan |
| Slide films such as Kodak Ektachrome Elite 100, Fujichrome Sensia 100, Agfachrome 100 and good quality premium brand ISO 100 negative film |
4200 dpi scan |
| All other films |
3000 dpi scan |
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| Landscape, Seward, Alaska, U.S.A. |
| Nikon F4s w AF-zoom Nikkor 80 - 200mm f/2.8D IFED w Exposure not recorded. |
| Kodak Ektachrome Elite 100 exposed at ISO125 |
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