I had taken this photograph using my Sony Ericsson W760a 3 MP camera a month ago while i was traveling in a car and I was surprised when I looked at it. A fast motion photograph usually appears blurred when using a low ISO but to see the picket fence in the form of rhomboid was surprising.
Today I read an article and identified what i had observed was a rolling shutter effect. It could be defined as a method of image acquisition where the image is recorded not as a single snapshot but by scanning across vertically or horizontally. Though it might spoil a really good pic, it can provide some magical effects.
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