Depth of field is a photography technique in which part of the picture is in focus and it gradually loses focus. This is usually accomplished by using a unique angle, or focusing on a strange item. The majority of the picture is out of focus, most of the time.

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)