What is Aperture?

THE APERTURE is built inside each lens and it controls the light entering a camera.  A lot like the shades on a window control the light:

Stopped down Aperture

“Stopped down” f16 or f22

Optimum Aperture

“Optimum” f8 or f11

Wide Open Aperture

“Wide open” f2.8 to f4.5

Measuring Aperture

Aperture is measured in f stops. The larger the number under the f, the smaller the hole (aperture) and the less light that comes in.

A wide open aperture results in a shallow depth of field whereas a smaller aperture results in a great depth of field.

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