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ROLLING SHUTTER DISTORTION Rolling shutter distortion results from a method of digital image acquisition in which each frame is recorded not from a snapshot of a single point in time, but rather by scanning across the frame either vertically or horizontally. In other words, not all parts of the image are recorded at exactly the same time, even though the whole frame is displayed at the same time during playback. (from Wikipedia) Rolling shutter causes image distortion when fast panning or when recording fast moving objects. It can also distort moving objects like fan blades and instrument strings.  Rolling Shutter distortion is most common in CMOS digital sensors and much less of an issue with CCD sensors. Rolling Shutter distortion is much more prominent in CMOS DSLR cameras than CMOS 3 chip camcorders.  The distortion effect can be reduced by recording with a very fast shutter speed i.e. 1/500 second.
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