What is "rolling shutter"?

Check out these cell-phone-camera shots of airplane propellers, victim to an effect known as "rolling shutter."

http://www.core77.com/blog/object_culture/your_cell_phone_cameras_unintended_rolling_shutter_effect_17253.asp

Seems those propellers have some issues :-)

interesting piece of info. had seen that phenomenon before.

Here is also one I noticed on Wikipedia when I was looking for something else, I think it shows less of an effect, but it looks a lot more realistic so you get a better idea of how it works:

http://upload.wikimedia.org/wikipedia/commons/4/46/Focalplane_shutter_distortions.jpg

It was used on:

http://en.wikipedia.org/wiki/Focal-plane_shutter

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