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TrustedReviews posted a Digital Camera Tutorial



When taking a photograph, there are really only three controls that matter on a camera: focus, shutter speed and aperture. Focus is reasonably obvious; you can quickly spot when a picture is out of focus. Likewise shutter speed is easy to understand since it is measured in fractions of a second. However aperture is a mystery to most people, because it is usually explained using technical jargon and its effects are not immediately obvious.
Digital Camera Tutorial: Aperture & Depth of Field