You might not want to blur the movement of water, preferring instead to freeze the motion. To do that, you would increase your shutter speed to capture the movement. Shutter speeds of 1/1250 can be used to freeze the movement of the water. The blur effect is produced by using slower shutter speeds for longer exposures. Freezing the motion can create an image that emphasizes the intensity of the water flow, while blurring the action creates a pleasing effect.