Definition of Film Shutter Speed Dial
The shutter is the device in a camera that opens and closes to expose the film to light for a measured amount of time. The shutter-speed dial or control on a camera selects the amount of time the film is exposed to light.
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The Dial
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The shutter-speed dial or button is a control usually located at the top left or right of a camera near the shutter button. It selects the shutter speed, the length of time the shutter remains open.
Settings
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Shutter-speed settings are in seconds or fractions of a second. These settings are 1 second, 1/2 second, 1/4 second, 1/8 second, 1/15 second, 1/30 second, 1/60 second, 1/125 second, 1/250 second, 1/500 second, 1/1000 second, 1/2000 second, 1/4000 second and 1/18000 second.
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What it Means
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Each setting lets in twice as much light as the next faster setting, half as much as the next slower setting.
Shutter-Priority Mode
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One setting on the shutter-speed dial is shutter-priority mode. This sets the shutter speed and the camera automatically sets the correct aperture.
Slower/Faster Shutter Speeds
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Along with controlling the amount of light that enters the camera, the shutter speed also affects the way moving objects are shown. A fast shutter speed can freeze motion-1/250 second is more than fast enough for most scenes. A very slow shutter speed will record even a slow-moving object with some blur (Reference 1).
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References
Resources
- Photo Credit Image by Flickr.com, courtesy of Damien McMahon
