How do I choose a shutter speed to freeze a moving subject?

Treat shutter speed as a starting estimate that you verify with a test photo. Faster shutter speeds freeze motion more effectively; slower speeds show more motion blur. For a walking subject, Canon gives above 1/125 second as an example and suggests 1/250 second or faster for more certainty. These are starting points, not universal settings. [S1]

Consider how quickly the subject moves across the frame. A subject moving across your view may cross it faster than one moving mostly toward or away from you, so test the result rather than assuming one speed will work for both. Take a photo and inspect the subject. If it is blurred, try a faster shutter speed and check again.

Don’t assume one speed works for every subject or scene. Use the subject’s movement across the frame as your guide, and test again when its direction or distance changes. Keep a note of those conditions so you can compare results instead of relying on a setting from a different situation.

Lens choice matters as well: Canon says shutter-speed choice depends partly on whether you use a wide or telephoto lens, as well as subject speed and lighting. [S2] For hand-held camera shake, Canon gives 1/focal length as a rule of thumb. That addresses camera movement, though; it does not guarantee that a moving subject will be frozen. [S1] Treat these as separate considerations.

Lighting is one factor in choosing a shutter speed, so review the image after changing the setting. [S2] If it looks too dark, check your camera’s manual or on-screen help for its exposure controls and available modes. The names and steps vary by model, so consult the guidance for your specific camera rather than relying on generic button instructions.

For a repeatable comparison, photograph the same action, change the shutter speed, and inspect the subject and overall exposure. Keep a record of what worked in that scene, but treat it as a starting point—not a rule for other lighting or movement.

For a freeze-motion test:

1. Note the subject’s movement across the frame, distance, lens, and lighting.
2. Choose a starting speed. For walking, above 1/125 second is one example; try 1/250 second or faster for more certainty, then judge the result. [S1]
3. Take a test photo and inspect the subject for blur.
4. If it is blurred, test a faster speed. If the image looks too dark, review your camera’s exposure guidance and retest.
5. Record the setting and scene conditions for reference.

To blur the background while keeping the subject relatively sharp, try panning: follow the moving subject with the camera while using a slower shutter speed. The suitable speed depends on movement, lighting, and lens, so review the results and adjust. Panning is a different effect from freezing motion; its example settings are not a universal freeze-motion formula. [S2]