The Shutter

The second mechanism that the camera uses to control the amount of light that exposes the film is called the shutter. The shutter is a device that determines how long the film is exposed to the light that passes through the aperture. The longer the shutter is open, the greater the exposure. The shutter is controlled by setting the shutter speed dial. Typical shutter speeds are 1/60,1/30, 1/15, and 1/8. These numbers represent fractions of a second. Therefore, 1/60 of a second is less time than 1/30 of a second and is said to be a faster shutter speed. Shutter speeds faster than 1/60 are useful for making objects that are moving appear sharp, and also for helping prevent camera motion from blurring the image. As a rule, you should try to avoid using shutter speeds slower than 1/30 of a second when you are shooting without a tripod.

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