Nikon n65 User Manual Page 42

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About Metering Systems and Exposure
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
N65/N65QD provides two metering systems: Matrix Metering (page 28)
and Center-Weighted Metering (page 58)f With Matrix Metering, data
on scene brightness is detected by the six-segment Matrix sensor. With
Center-Weighted Metering,
most of the meter’s sensitivity is
concentrated on the 12mm-diameter center circle in the viewfinder. With
the N65/N65QD, 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.
Using D- or G-type Nikkor lenses, the N65/N65QD camera performs 3D
Matrix Metering by adding distance information to determine correct
exposure.
■ 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 N65/N65QD’s AUTO mode (page 51), Auto-Multi Program (page 52)
and Vari-Program (page 36) automatically control shutter speed and
aperture. In Shutter-Priority Auto exposure mode (page 54), you can
manually set shutter speed and the camera automatically sets the proper
aperture. In Aperture-Priority Auto exposure mode (page 56), you can
manually set aperture and the camera automatically sets the proper
shutter speed. In Manual exposure mode (page 58), you manually set
both shutter speed and aperture.
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