Messier_82

Messier_82 t1_j0h52qq wrote

It’s important for video, maybe high speed flash photography too.

CMOS sensors use a “rolling shutter”, where the image is taken one line of pixels at a time across the sensor. For video of fast moving objects this can distort the appearance and motion significantly. If you’ve ever tried to take a video of a propeller plane engine you’ve probably seen this effect. It can also cause the entire image to wobble back and fourth like jello if the entire camera is moving rapidly or vibrating.

https://youtu.be/dNVtMmLlnoE @2:44

A global shutter would have all of the image lines captured at once, eliminating this problem and making any high-speed motion look better in general.

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