Multiple Exposure

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My Nikon DSLR and many other cameras offer an in-camera method of making multiple exposures. You set the number of shots and your meter calculates the exposure such that you won't overexpose. Without this feature - and in the old film days - you would need to underexpose each shot so that the combination resulted in a proper exposure.

This shot is War Eagle Mill in Rogers, Arkansas. While making the multiple exposures, I panned with the water wheel, attempting to freeze it enough to be a recognizable subject while letting the side walls blur and the water do whatever it did.

Multiple exposures are used most often for an expressionistic look. Try moving your camera in the direction of the pattern (for example, vertically with a tree trunk). A little goes a long way, so at first try smaller movements in between shots.