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If you shoot 120fps with 360° shutter angle you can downsample to 24fps with 144° shutter angle, which is close enough to the traditional 180°. And in any case
by mrob 7y ago
If you shoot 120fps with 360° shutter angle you can downsample to 24fps with 144° shutter angle, which is close enough to the traditional 180°. And in any case cinematographers often vary the shutter angle, so viewers are already used to changes. Narrow shutter angle is common in modern action movies.
- dperfect 7y agoYes, cinematographers do vary the shutter angle for artistic purposes, but that just confirms the fact that the amount of motion blur present in a film is a deliberate artistic decision rather than a side effect of using an "antiquated" frame rate. As for downsampling, I believe your math is off. 120 fps at 360° means each frame is exposed at 1/120s. Conforming that to 24 fps gives you the same exposure duration per frame (you're just throwing out 4/5 frames), so you're effectively at a 72° shutter angle - less than half of what's considered "normal".
- mrob 7y agoI only said that 144° effective shutter angle is possible, not that you can achieve it by deleting 4/5 frames (which does give you effective 72° shutter angle). You actually need to delete 3/5 and blend 2/5 (and the 360° shutter angle of the 120fps source needs to be accurate enough that you don't see the join).