This Month in Photo of the Day: Your Photos With Tips From Photographer Catherine Karnow

The mysterious, moody quality of this image is achieved with a slow shutter speed, which gives both the water and the mist a wonderful, swirling movement. The slow shutter also makes the supporting elements work: the blue in the dusk sky, the lights on the opposite shore.

Photo Tip: Try slowing down the shutter when you shoot water—this always adds an interesting effect.

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