Aperture Depth of Field or DOF is just a fancy term for how much of the space between your camera and the horizon, or “infinity,” will be in focus in your photograph. Your DOF is LARGE (DEEP) if lots of your scene is in focus; it is NARROW (SHALLOW), if there is only a small range of space that is in focus.
Depth of field exists because of the way camera lenses work in relation to the film. But all you need to know is how to make depth of field WORK for you!
You can control how much of your photo will be in focus and how much will be blurry – this is a great technique you should master. Once you know the tricks, it’s easy, and using it, you can instantly turn snapshots into creative and original photographs!