perform well as a Navy photographer, you must
recognize the effect of these lens characteristics. Realize
lens features and/or qualities that can make the
difference between good and poor photography. You
must learn to recognize the photographic effect of these
characteristics and be able to apply them to produce top
quality photography. Finally, you must learn how some
of the lens characteristics may limit photographic
quality or operational capability.
infinity (fig. 1-17). To understand this definition, you
must fully understand the terms focal plane, optical
center, and infinity.
the surface or area at the back of the camera occupied
by the film.
which the rays of light from two different sources
entering the lens are assumed to cross.
the point is to the lens, the greater is the angle of the
spread of light rays from the object (fig. 1-18). As the
Basic Photography Course