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Track 1 · Exposure5 min read

LESSON 02

Shutter speed

How long the sensor looks at the scene. It decides whether motion freezes or flows.

THE SAME RUNNER AT FIVE SPEEDS

  1. 1/4000 s
  2. 1/1000 s
  3. 1/250 s
  4. 1/60 s
  5. 1/15 s
← FREEZES MOTION · LESS LIGHTMORE LIGHT · MORE BLUR →

What the number means

The shutter speed is the time the shutter stays open, in seconds. 1/1000 is a thousandth of a second; at 1/15 the shutter stays open about sixty-seven times longer and lets in that much more light.

Light

Each step that doubles the time doubles the light: 1/500 to 1/250 is one stop brighter. To keep the same exposure, close the aperture one stop or halve the ISO.

Motion

A fast shutter freezes a runner, a splash or a bird. A slow one turns water to silk and people into streaks. Hold the camera still, or put it on a tripod, below about one over the focal length.

Try it today

  1. 01Set S or Tv, shutter priority.
  2. 02Find moving water or traffic.
  3. 03Shoot at 1/1000 s.
  4. 04Shoot again at 1/15 s, braced on a wall.
  5. 05Compare the motion in the two frames.