Shutter speed
Shutter
speed is one of the parameters of the exposure triangle. Shutter speed
measures the time during which the diaphragm is open, allowing the light
to reach the film or sensor. Shutter speed is measured in seconds, or
fractions of a second.
As with aperture, shutter speed has another impact on the final image.
Consider a moving subject. If you use a slow shutter speed, the subject will travel a significant distance during the shot, which wil introduce "motion blur". If you use a fast shutter speed, the movement of the subject will be too small to be noticeable: you have "frozen" the movement.
As with aperture, shutter speed has another impact on the final image.
Consider a moving subject. If you use a slow shutter speed, the subject will travel a significant distance during the shot, which wil introduce "motion blur". If you use a fast shutter speed, the movement of the subject will be too small to be noticeable: you have "frozen" the movement.
Here
again, there is no golden rule as to what shutter speed to use. In some
situations, you will want a motion blur while in others you will want
to freeze the movement.
Another point of attention is when you are handholding your camera. Even if the subject is still, you will experience camera shake if the shutter speed is too slow. As a rule of thumb, it is usually admitted that, to avoid camera shake, the number measuring the fraction of seconds should be higher than the focal length. For example, with a 100mm focal length, shutter speed should be faster than 1/100s.
Another point of attention is when you are handholding your camera. Even if the subject is still, you will experience camera shake if the shutter speed is too slow. As a rule of thumb, it is usually admitted that, to avoid camera shake, the number measuring the fraction of seconds should be higher than the focal length. For example, with a 100mm focal length, shutter speed should be faster than 1/100s.