Depth of field Everything in this area appears in focus ... The principal focal point is the point where rays coming from a long distance converge. The distance between the principal focal ...

Our approach to extending the depth of field utilizes the concept of point spread function (PSF) engineering to greatly increase the axial range clearly imaged in a single exposure. The basic concept ...

No, I'm talking about the intentional things we photographers do to limit the depth of field in our pictures. Things we can do to make the backgrounds nice and soft, leaving just the subject in ...