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
- 1/4000 s
- 1/1000 s
- 1/250 s
- 1/60 s
- 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
- 01Set S or Tv, shutter priority.
- 02Find moving water or traffic.
- 03Shoot at 1/1000 s.
- 04Shoot again at 1/15 s, braced on a wall.
- 05Compare the motion in the two frames.