Shutter speed explained: settings for sharper photos

The short version: Shutter speed is the length of time your camera records light for a photograph. Faster speeds help freeze movement, while slower speeds let movement blur and give the sensor more time to collect light. Choose it for the motion you want to capture, then balance aperture and ISO around it.

What shutter speed means

Shutter speed is measured in seconds or fractions of a second. A setting of 1/1000s is a much shorter exposure than 1/30s. A one-second exposure gives movement far longer to leave a trail.

The bigger number underneath the fraction means a faster shutter. Going from 1/125s to 1/500s makes the exposure shorter.

As Nikon explains, shutter speed affects both exposure and how movement appears. A footballer’s boot might look sharp at a fast speed and become a streak at a slower one.

Shutter speed settings to start with

Use these as starting points, then check your photographs:

• People keeping fairly still: 1/125s to 1/250s.
• Walking people or gently moving pets: 1/250s to 1/500s.
• Running dogs or sport: 1/1000s to 1/2000s.
• Panning with a passing bicycle: try 1/30s, following it smoothly.

Nikon’s motion guide explains why subject speed changes the setting you need. Distance and direction matter too. Movement across the frame generally produces more obvious blur than movement towards you.

For panning, keep the subject in roughly the same place in the viewfinder as you turn. The aim is a recognisable subject against a streaked background. Expect some unsuccessful frames while you practise.

Camera shake and subject movement

Camera shake comes from your hands moving during the exposure. Subject blur comes from whatever you are photographing moving.

A sharp background with blurred hands or feet usually points to subject movement. Smearing across the whole frame suggests camera shake. Missed focus can also cause softness, so check where the camera focused.

Longer focal lengths make camera shake more noticeable. With a 50mm lens on a full-frame camera, around 1/60s is a traditional starting point for a still subject. Try 1/125s if you are struggling. Canon uses the reciprocal of focal length as a baseline in its EOS R6 automatic minimum-speed setting.

Image stabilisation reduces camera shake and may let you handhold slower speeds. It cannot freeze a moving child.

How shutter speed affects exposure

With the light, aperture and ISO unchanged, switching from 1/250s to 1/125s doubles the exposure time and the light collected. That is one stop more exposure. Switching from 1/250s to 1/500s halves both.

To keep a similar image brightness with a faster shutter, you may need a wider aperture or a higher ISO.

A wider aperture can reduce how much of the scene is acceptably sharp. Higher ISO settings can make noise more visible. On a grey afternoon, letting ISO rise can be a sensible trade for keeping a running dog’s face sharp.

Using shutter priority

Shutter priority lets you choose the shutter speed while the camera sets the aperture. It is labelled S on Sony cameras and Tv on Canon EOS cameras.

Enable Auto ISO as well, if available, to let the camera adjust ISO as the light changes.

Watch for a blinking aperture value or an exposure warning. The camera may have reached the limits of its available settings. Check the photograph and adjust the ISO limit or shutter speed to suit the light.

Try this

In daylight, photograph someone walking across your view. Use shutter priority and Auto ISO, keeping your position and framing similar.

Take photographs at 1/60s, 1/250s and 1/1000s. Magnify them during playback and compare the face, hands and feet. Check whether the background is sharp too.

Repeat with a quicker walk. Start at 1/250s, then try 1/500s and 1/1000s. Keep a note of the slowest setting that gives the amount of movement blur you want.