f/1.7~ ~ ~ f/2~ ~ ~ f/2.8~ ~ ~ f/4~ ~ ~ f/5.6~ ~ ~ f/8~ ~ ~ f/11~ ~ ~ f/16 SHALLOW DOF ~~~~lens apertures - smaller number = bigger opening ~~~~DEEP DOF |
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Controlling Depth of Field overviewDepth of field is the distance in front of and behind the subject that appears to be in focus. You focus the lens on one part of the image, the lens opening (aperture or f/stop) determines the depth of field. A large opening (f/2) creates shallow DOF with only one point in focus. A small opening (f/16) creates deep DOF with extended focus from near objects to distant object.
If your camera doesn't have a depth of field preview and scale on the lens, you will have to go on faith that the effect will happen. Remember that the DOF extends in front of and behind the area you see in focus. To include two subjects in focus you need to focus between them. |
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