When we press the shutter button, the shutter in-front of camera sensor will open. The aperture setting decides how wide the shutter will opened. The light will enter to the camera sensor much more as the increasing of shutter opening.
Aperture or opening is stated in f-stop unit. If we read aperture 5.6, in photography could be stated as f/5.6. The statement is: f-stop become small makes aperture or opening becomes wide, it means more lights contact with camera sensor. See the illustration below:
It means wide opening is given by small number of f-stop or aperture and vice versa.
Depth of Field
Depth of Filed – DoF, is the measurement how far the field in focus area of the photograph. Wide Depth of Field (DoF) means the objects near to the camera to the farthermost will be sharp focused in the photograph. Shallow Depth of Field means only definite object will be focused and the rest will be out of focus or blur.
Deep Depth of Field will be got by setting the aperture to the biggest number or the narrowest opening, while Shallow Depth of Field will be got by setting the smallest number of aperture or the widest opening.
The Depth of Field Concept is useful in portrait photography and macro photography, however, all kind of photography will need this concept.
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