Shutter Speed: Freezing or Blurring Motion
Shutter speed is the duration the camera's shutter remains open, controlling how long the camera sensor is exposed to light. It is expressed in fractions of a second: 1/1000s, 1/500s, 1/250s, 1/60s, and so on — down to multiple seconds for long-exposure night photography. Fast shutter speeds (1/500s and faster) freeze motion: athletes in mid-jump, splashing water drops, birds in flight all appear tack-sharp. Slow shutter speeds (1/60s and slower) introduce motion blur: a waterfall becomes silky and smooth; car headlights at night become light trails; a dancer's gesture becomes an expressive blur. The photographer chooses whether to freeze or blur motion intentionally — both are valid creative tools. The other critical consideration for shutter speed is camera shake. Handheld photography at slow shutter speeds causes blur from your own hand movement, not the subject. The traditional 'reciprocal rule' recommends using a shutter speed at least equal to the reciprocal of your focal length: on a 50mm lens, stay at 1/50s or faster; on a 200mm telephoto, stay at 1/200s or faster. Longer focal lengths amplify camera shake, requiring faster shutter speeds. Image stabilization (IS/VR) systems allow approximately 3–4 stops of shutter speed reduction — a 200mm lens might be handhold-able at 1/25s with IS. For critical sharpness with slow shutter speeds, use a tripod.