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Metering
systems
and
exposure
are
important
factors
for
taking pictures.
Knowing
the
characteristics
of
each
factor
helps you widen
your
photographic
expression .
• Metering Systems
As
the proper combination of shutter speed and aperture for correct exposure
is determined according
to
subject brightness and film sensitivity, measuring
subject brightness is very important.
In
general, brightness inside the viewfinder is not uniform. The N75/N75QO
provides two metering systems:
Matrix Metering (page
26)
and Center-
Weighted Metering
(page
60).
With Matrix Metering, data
on
scene
brightness is detected by the 25-segment Matrix sensor. Using G- or O-type
Nikkor lenses, the N75/N75QO camera performs
25-segment
3D
Matrix
Metering
by adding distance information to determine correct exposure. With
Center-Weighted Metering, brightness is detected at the central areas
including five focus areas
in
the viewfinder. With the N75/N75QO, Matrix
Metering
is automatically selected when the exposure mode is set to other
than Manual and
Center-Weighted Metering is selected with Manual
exposure mode .
• Exposure
Light from the subject passes through the lens and exposes the film. Light
reaching the film is controlled by the shutter speed and aperture. The proper
combination of shutter speed and aperture for subject brightness and film
sensitivity results
in
the correct exposure.
The N75/N75QO's
'g'
mode (page
26),
Auto-Multi Program (page
54)
and Vari-
Program (page
34)
automatically control shutter speed and aperture. Vari-
Program gives you the option to choose from Portrait, Landscape, Close-Up,
Sports or Night Portrait
mode-designed
for specific picture-taking situations
and photographic images.
In
Shutter-Priority Auto exposure mode (page
56),
you can manually set shutter speed and the camera automatically sets the
proper aperture.
In
Aperture-Priority Auto exposure mode (page
58)
, you can
manually set aperture and the camera automatically sets the proper shutter
speed.
In
Manual exposure mode (page
60)
, you manually set both shutter
speed and aperture.