Definition

If you would like to have a clear scene while your subject blurs past with speed, you will have to figure out a way to keep the camera steady enough to capture the background clearly while your shutter stays open an extended amount of time. This method can obtain some amazing photos and is commonly used at night with cars and headlights. I'm sure you have seen photos of a freeway at night with the headlights of cars making lines through the exposure. This definitely required some sort of tripod and a very long shutter speed; a shutter speed probably multiple seconds long.

(c) Meg Forbes

(c) Meg Forbes

(c) Meg Forbes