When you move your camera during an exposure, all kinds of things can happen. Usually you don’t mean to, and thus you get a blurry picture. That’s usually bad.
But if you move the camera deliberately, say, slowly upward during along exposure, then you can get some really neat results. Here is a 2 second exposure on the Nature Conservancy’s Ordway Prairie in South Dakota.
Canon 1Ds Mk II. 75mm. ISO 50. f/32 @ 2 seconds. 0 EV.
