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Understanding shutter speed

Shutter speed is one of the three pillars of exposure, alongside aperture and ISO. It refers to the length of time the camera's shutter remains open, exposing the sensor to light. Of the three variables, shutter speed is the one most directly responsible for how motion is rendered in a photograph; whether frozen in crisp detail or blurred to convey a sense of movement.

The shutter speed scale

Shutter speeds are typically expressed in fractions of a second for fast exposures and in full seconds for slow ones. The standard full-stop scale runs: 30s, 15s, 8s, 4s, 2s, 1s, 1/2s, 1/4s, 1/8s, 1/15s, 1/30s, 1/60s, 1/125s, 1/250s, 1/500s, 1/1000s, 1/2000s, 1/4000s, and 1/8000s. Each full stop halves or doubles the amount of light reaching the sensor. Many cameras also support a Bulb mode, where the shutter stays open for as long as you hold it, which is useful for exposures lasting minutes or even hours.

Fast shutter speeds: freezing the moment

Shutter speeds of 1/250s and faster are used to freeze motion. The faster the subject is moving, the faster the shutter speed you need to capture it sharply.

  • 1/250s is sufficient for most everyday subjects: people walking, children playing, pets.
  • 1/500s – 1/1000s is ideal for sports photography and fast-moving subjects like runners, cyclists, or cars.
  • 1/2000s – 1/8000s is needed for the fastest action: birds in flight, splashing water, motorsport. The combination of a long focal length and fast shutter speed is the hallmark of wildlife photography.

Slow shutter speeds: conveying motion

Slower shutter speeds allow moving subjects to blur across the frame, creating a sense of dynamism and energy. This is a powerful creative tool when used intentionally.

  • 1/30s – 1/8s is great for motion blur effects. Panning the camera with a moving subject at these speeds keeps the subject relatively sharp while streaking the background.
  • 1/4s – 1s smooths flowing water into a silky texture. This is a classic waterfall photography technique; a tripod is essential at these speeds.
  • Several seconds to minutes opens up long exposures of cityscapes at night, light trails from passing traffic, and smooth, ethereal seascapes.

Bulb mode and star trails

For exposures longer than 30 seconds, most cameras offer Bulb mode, where the shutter stays open indefinitely. This is the technique behind star trail photography, where the Earth's rotation traces arcs of light across the sky over the course of minutes or hours. A sturdy tripod and a remote shutter release are essential.

The handheld rule

A widely cited guideline for avoiding camera shake when shooting handheld is the reciprocal rule: your shutter speed should be at least 1 over the effective focal length. For example, shooting at 50mm on a full-frame camera, you'd want at least 1/50s. At 200mm, you'd need at least 1/200s. Image stabilisation in modern lenses and camera bodies can give you several extra stops of latitude, but the principle remains a useful starting point.

Shutter speed and exposure

Shutter speed doesn't work in isolation. It's intimately tied to aperture and ISO in what photographers call the exposure triangle. Doubling your shutter speed (say, from 1/125s to 1/250s) halves the light hitting the sensor, so you need to compensate by opening the aperture one stop or doubling the ISO.

Explore photos by shutter speed on shutterdial

Use shutterdial to browse real photos from Flickr filtered by shutter speed. See how different exposure times shape the look and feel of an image:

Or start a custom search and dial in any combination of focal length, aperture, and shutter speed to discover what's possible with your camera.