Shutter Speed — Simply Explained
Shutter speed controls how long your camera's sensor is exposed to light. It's like blinking: a fast blink (short shutter speed) freezes everything in place. A slow blink (long shutter speed) lets motion blur into your image. It's your main tool for capturing action or creating artistic motion effects.
How Is Shutter Speed Measured?
Shutter speed is measured in seconds or fractions of a second. 1/1000s is very fast (freezes a sprinting athlete). 1/250s is moderately fast (freezes walking). 1/60s is the slowest you should handhold without blur. 1s or longer is very slow (blurs waterfalls, light trails). Each step doubles or halves the amount of light hitting the sensor.
The Handheld Rule
A useful rule: your shutter speed should be at least 1/(focal length) to avoid camera shake. With a 50mm lens, use at least 1/50s. With a 200mm lens, at least 1/200s. Image stabilization in your camera or lens can buy you 2–4 extra stops, but this rule is a good starting point.
Practice Tip
Find a road with moving cars. Set your camera to Shutter Priority mode (S or Tv). Take one photo at 1/1000s (cars frozen sharp) and one at 1/30s (cars blurred into streaks). This one experiment teaches you more about shutter speed than any textbook.
Frequently Asked Questions
Why are my handheld photos blurry?
Most likely your shutter speed is too slow. When you hold the camera, your hands naturally shake a tiny bit. If the shutter is open long enough to capture that shake, the photo blurs. Try increasing your shutter speed or raising your ISO to compensate.
How do I photograph silky waterfalls?
Use a slow shutter speed (0.5s–2s) on a tripod. Set ISO to 100 and narrow your aperture to f/11–f/16 to reduce the light. If it's still too bright, you may need an ND (neutral density) filter to darken the scene without changing your settings.
Put It Into Practice
Use the wizard to get camera settings for your next shot — based on what you just learned.