Transcription: Used properly, blurs can add interest to a photograph. Allowing a moving subject to create a blur by using a slow shutter speed can suggest motion and add color in a composition. The blurred paddle in this scene indicates action and creates a more interesting composition. Running water is a popular subject for slow shutter speed blurs. Waterfalls are transformed into silky strands of water with a tripod and an exposure of 1 15th of a second or longer.