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Aperture & Shutter Speed

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S. Ballew

on 17 September 2015

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Transcript of Aperture & Shutter Speed

Aperture, Shutter Speed

is the part of the camera that controls the VOLUME of light that hits the film/censor.
Aperture is denoted by the f stop, a fraction that indicates the diameter of the aperture opening.

Each full stop denotes a doubling or halfing of light...
Aperture effects the depth of field in an image.
Depth of field is the area of the image that is acceptably sharp.
is like the gate that controls the amount of TIME the aperture light hits the camera's sensor/film.

Shutter Speed also
camera and/or subject movement.

This picture has a small aperture (a larger fstop number, i.e. f16. f22), hence a longer depth of field. (Everything in the frame is in focus.)
This picture has a wider aperture (a smaller fstop number. i.e. f2.4, f4), hence a shallower depth of field.
The subjects of this picture are slightly blurred, hence the shutter speed is slower than average - below 1/60 of a second.
The movement of the horse has been sharply frozen in time. Hence, the use of a fast shutter speed, i.e. 1/500.
Aperture & Shutter Speed work hand-in-hand to create proper exposure.
It is much like the iris of a human eye.
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