photo shutter speed
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Three Pillars ofPhotography
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Three Pillars of Photography
• Aperture
• Shutter Speed
• ISO (film speed)
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Shutter Speed
• What is a Shutter?
• The shutter is a curtain that covers the camera sensor until the shutter button is pressed. When it moves, light is allowed to hit the sensor to create an image.
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Shutter Speed Defined
• Shutter Speed refers to the length of time the camera sensor is exposed to light. It is the length of time the camera shutter is held open.
• Shutter speeds range from 1/2000 of a second (pretty darn fast) to 1 second and longer.
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Effects of Shutter Speed
• A fast or quick shutter speed freezes motion and can be used in situations with a lot of light. Because the shutter open for a very short period of time a lot of light is required for a proper exposure.
• A slow or long shutter speed (anything longer than 1/60 of a second) will allow more light to enter the camera and causes motion blur.
• A slow or long exposure requires the use of a tripod or stabilizing method in order to make the blur localized to only the moving element.
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This photo was taken at 1/1600 second
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This photo was taken at 1/250 second
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This photo was taken at 1/2 second
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This photo was taken at 5 seconds
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Shutter Speed and Aperture
• A fast shutter speed requires more light to create a proper exposure.
• How does this impact your aperture setting?
• If you use a fast shutter speed you need to have a large aperture.
• A slower shutter speed needs less light and therefore a smaller aperture.
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Shutter Speed, Aperture and Depth
of Field• The depth of field of a photograph becomes shallower when the aperture is larger (smaller f-stop number).
• To take photographs with a shallow depth of field you typically need a large f-stop (f1.7 - f2.5) and a fast shutter speed (1/250 - 1/2000 second)
• If there is a lot of light the camera will want to "stop down" or decrease the size of the aperture which will result in more of the image being in focus.
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The image on the left used a large aperture (f1/7) and a fast shutter speed (1/800 second). The image on the right used a smaller aperture (f14) and and a slower shutter speed (1/100 second).
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You've just learned about shutter, shutter speed, motion blur, and how shutter speed and aperture interact to impact depth of field.