Nikon 2SB Photomic Buku Petunjuk - Halaman 26
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Halaman CetakEXPOSURE MEASUREMENT-continued
Eyepiece Shutter Operation
The camera's Photomic
finder
is
fitted
with
an eyepiece
shutter for special
unmanned
shooting situations
(e.g.,
remote
control, automated shooting
with motor drive
and aperture control
unit) requiring protection
against
the entry of stray
light through
the viewfinder eyepiece.
To
close
the shutter, simply turn the eyepiece shutter
control 60°
clockwise;
as the shutter
closes,
the internal
LEDs
are deactivated and the external "correct exposure"
indicator is
switched on for
metering
operation from
atop
the
finder.
To
set
the
camera
for proper
exposure
using the
external
LED indicator,
simply adjust
the
aper-
ture ring
and/or
the
shutter-speed selector
until the LED
just glows;
once
the LED
comes on,
the
camera
is
set
for correct
exposure.
In
addition
to its use for low-light metering
or for
un-
manned photography,
the eyepiece
shutter
comes
in
handy
to ensure correct exposure
measurement in criti-
cal shooting
situations
(e.g., photomicrography)
or
for
protection
against
the
entry of
bright light into the view-
finder during daylight shooting.
26
High-Contrast Lighting Situations
When there
are substantial
brightness
differences
be-
tween the
main
subject and
the background, unimpor-
tant
bright spots or dark spots can adversely
influence
the finder reading, and thus
the
final exposure.
To pre-
vent under-
or overexposure of the
main
subject
under
these
shooting
cond itions,
some corrective action
must
be
taken to ensure proper exposure of the
main subject.
Fortunately, the
finder's center-weighted TTL
metering
action simplifies adjustments,
making
for qu icker camera
operation and
more
accurate final
resu Its.
To
compensate for an excessively bright or
dark back-
ground, target
the main
subject
in the center
of
the fo-
cusing
screen
wh ile performing metering; th is
action en-
sures that
the main
emphasis of
the meter reading will
be
on the
chosen
subject.
Then,
after completing aper-
ture
and shutter speed adjustments,
recompose to the
desired picture
composition and
make the
exposure
without readjusting the
camera
controls. For
example,
when
shooting
landscapes, it is often
advisable
to aim
the camera slightly downward during
exposure
measure-
ment to eliminate the
effects
of
a
bright
expanse
of sky;
without such compensation, the landscape may
appear
underexposed in the final print. Also, for backlit sub-
jects, it may be necessary to move closer to the subject
to ensure a proper reading.