Shutter speed is the unit of measurement which determines how long the shutter remains open as the picture is taken. The slower the longer. Shutter speeds are expressed in seconds or fractions of a second. For example 2″, 1″, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250 and on. Each speed increment halves the amount of light. This is used to create dramatic effect within the photograph by either freezing action, or blurring movement as shown on this picture I have chosen. The light seems frozen and the arm is blurred. & this image as taken in half of a second shutter speed. It is really fun to try.
