(1) This lens produces an image in which the relative size of objects
appears the same as they would to the eye. Also the sharpness of near and
far objects (depth of field), relative to the point of focus, matches that
seen by the eye.
(2) The normal angle lens is used effectively when the subject matter
is not confined to limited space.
If there is room to move around the
subject and placement is all that is required, a normal angle lens can be
used effectively.
b. Wide Angle Lens. The wide angle lenses cover a field of view of 45
degrees or more. Extreme wide angle fish eye lens covers up to 75-degrees
field of view.
(1) You will be able to stay close to your subject and put a lot more
of your subject on the film using these lenses.
They are very handy and
effective in tight places. Perspective is often exaggerated and distorted.
(2) Combined with the extreme depth of field, you can present your
subject in unusual and interesting ways which reinforce the feeling you are
trying to portray. Consider a low-angle view taken with a 28mm lens of the
muzzle of a 155mm Howitzer. It would make the muzzle look awesome and give
the viewer a feeling of strength and power.
c. Telephoto Lens. The long focal length (telephoto) lens has a field
of view less than 45 degrees. As the focal length increases, the field of
view will decrease.
(1) You will find these lenses extremely useful in situations where
you can not physically get close to your subject. They can reach out and
capture large images of subjects at a distance.
(2) Their normal shallow depth of field makes them an ideal lens with
which to use the "selective focus" technique to isolate a subject from
surrounding, distracting elements.
(3) Another interesting effect that a long lens produces is
"compressed perspective." A photograph of a line of cars traveling down the
highway makes them look close together, and thus, strengthens the feeling of
crowding.
d. Lenses are tools. You can use them to portray your subject in an
interesting way, grab and hold the viewer's attention, and direct him to the
point of the subject matter.
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