Nikon Photomic FTN Finder Manual de instruções - Página 14

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Nikon Photomic FTN Finder Manual de instruções
EXPOSURE MEASUREMENT WI
TH
THE PHOTOMIC FTN FINDER (F
14
OUTSIDE
WINDOW
fj]
Correct exposure
Overexposure .....
;
.....
Underexposure
I
EYEPIECE VIEW
The Photomic
FTN
uses a center-weighted thru-the-
lens metering system that reads the light over the
entire focusing screen but favors the central portion
of the
screen.
This means that it
is
possible to get
correct exposure in situations where an averaged read-
ing of the entire screen would result in underex-
posure of the main sUbject-with strongly back-
lighted
portraits,
for example. And since measure-
ment is always done at full aperture with Auto
Nikkor
lenses,
the viewfinder image is bright and
clear.
The amount of light reaching the film (exposure) is
determined by a combination of lens aperture and
shutter speed
.
Since the two are
interrelated,
dif-
ferent combinations will give the same amount of
exposure.
For example, 1/500 second at f/2 is the
same as 1/30 second at f/8
.
The choice of aperture and shutter speed depends
on the results desired. Choose a fast shu tter speed to
"freeze"
motion,
a slow one
to
create deliberate
blur. Use a small lens aperture for wide depth of
field or a large one to make the main subject stand
out and throw unimportant background out of focus.