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| | DigiConform - 35mm 3 perf |
 | | In comparison to 4 perf, the frame line becomes a moving target, because after the first frame 3 perf is 1 perf shorter, 2 perfs after the second, 3 perfs after the third frame, and only after the 4th frame the frame lines match up again between 3 perf and 4 perf. |
 | | This one perf accumulates to 2 unused perfs after the second foot, and then to 3 perfs, or an entire 3 perf frame, after the third foot. |
 | | In 4 perf exactly 16 frames have gone by, but in 3 perf it is 21 frames and a little bit. |
| www.digiconform.com /3perf/3perf.html |
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