A type of photographer's error that shows up as a blurred image on a negative when really the subject was still and in focus. The problem usually comes down to using too slow a shutter speed when shooting hand-held (without the aid of a tripod).

The minimum shutter speed for shooting hand-held is dependent on a number of factors:

Ultimately, if you want to be fairly certain you can eliminate camera movement 95% of the time you should use a shutter speed of 1/30th or faster. 1/60th will guarantee it unless you're jumping about like a madman.

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