Controlling depth of field simply means controlling how much of your scene is in focus and how much is blurred. One way to do that is to use a large aperture to obtain a shallow depth of field (only subject in focus is sharp, background is thrown nicely out of focus; great for portraits) and a small aperture to maximize depth of field (everything from near to far is in sharp focus; great for landscapes). But did you know there are two other ways you can affect depth of field? Brian Auer explains.
Read the tutorialat: Epic Edits.[ via Steve’s Digicams ]