Nikon Photomic-T Finder Petunjuk Manual - Halaman 15

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DI
COUPLING
·
RANGE OF METER
It may happen that by an e
-1<
tremely bright or dark scene, the meter needle stops or
make a discontinuous movement and con not be set to the center.
This does not indicate
any disorder but the fact that the br ightness of the scene is out of the coupling range
of the meter.
For example, when using a lens of
F
/
1A
and a film of ASA
100, a
brightness over the aperture
Fj22
at the shutter speed
1/
500 sec. or under
F/1A
at
sec. will not be within. the coupling range
.
The same movement of the needle may be possible
even within the coupling range
when the combination of aperture and shutter speed is selected too far away from the
correct exposure toward the opposite limit.
In this case, reset the shutter speed to 1/15
or
1/
60
sec. and try again the measurement, then the correct centering will be obtained.
Note:
The least coupling brightness var
i
es with the max. aperture of the lens in use
.
Therefore, for
example,
if the
F/
4 lens is replaced with the
F/
1.4 lens, a
brightness under
F/
4,
1 sec. will become out of the coupling range of the
meter
.
15