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Lenses:
Part 2: Wide Angle (continued)
30 feet away (keep in mind that
the Nikonos and Sea & Sea lens were designed for underwater use,
and magnification was a not factor). It's merely used to
illustrate the principle of depth of field.
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Super
wide-angle lenses like a 17mm Sea & Sea, in conjunction with
a small apertures (f22 in this case), result in enormous
depth of field.
Everything
from the corals in the foreground to the starburst at the
surface in in focus. |
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Second benefit: Close focusing
"portraiture"
Super wides allow the photographer to approach the subject closely
while simultaneously framing it with a wide expanse of background.
Normally, if you try to take a
picture of a fish with a "standard" wide-angle lens, say a 28mm
lens, the minimum focusing distance of that lens forces you to
back away to the point where the subject is relatively small with
respect to the entire framed area.
By contrast, with a super
wide-angle lens, you can
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