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Old 31st May 2012, 10:30
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Mark1234
 
Join Date: May 2006
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What bushfiva said, only the other way round!

CMOS devices generally suffer the 'rolling shutter'. The image is scanned line at a time off the chip, so motion between line scans gives you the strange prop effects and vibration skew etc. This can be mitigated with a dark filter over the lens / other means of slowing the shutter speed so these objects don't register. Not a perfect solution.

CCD sensors generally operate a global shutter. The chip construction allows provision of a set or secondary registers on chip - at the end of the exposure the imaging sensors are transferred to their secondaries en masse, then the secondaries are read. As such you don't get the skew etc.

That said, it seems nobody uses CCDs in their devices anymore..
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