All cameras have at least two ways to control light: the shutter and
aperture. The aperture is like an iris in the eye, and controls light by
changing size. When photographer takes a picture, the shutter opens
briefly and the image is exposed.
In any shooting situation there are several
combinations of shutter and aperture that could be considered correct.
Which settings to choose is a matter of personal taste, and is usually
influenced by how much light is available.
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| i take this picture when i having fun with my friend, wish you love it :) |
First set the camera to 1/500 at f/2.8 and take a shot. Then take another shot after changing the exposure to
1/60 at f/8.
Notice how the overall brightness did not change.
In the second exposure you gave 3 stops MORE light
with the shutter, but balanced it out by removing three stops of light
with the aperture.
Remember that shutter speed, f-stop settings,
and even film speed are all rated in units of "stops".
