Depth of field is determined by the Aperture setting and the subject distance and is the amount of the photograph that is in focus.

• A more open (eg f2.8) aperture gives you a narrower depth of field.

• A more closed aperture (eg f22) gives you a wider depth of field.

• A short focal length gives you a narrow depth of field.

• A long focal length gives you a wider depth of field.