Glossary - Nikon N55 Instruction Manual

Glossary
CPU
Central Processing Unit. The electronic component that controls an electronic product's
functions.
AF Nikkor (including G- and D-type AF Nikkor) and AI-P-Nikkor lenses have built-in
CPUs.
EV
Exposure Value: A number representing the available combinations of shutter speeds
and apertures that give the same exposure effect under conditions of similar scene
brightness and ISO.
At ISO 100, the combination of a one-second shutter speed and an aperture of f11.4 is
defined as EV1 .
The camera can be used only within the EV range of the exposure meter. For example,
with the N55, the exposure metering range is from EV1 to EV20 at ISO 100 with an f/ 1.4
lens.
Exposure bracketing
Shooting the same subject a number of times at a range of different exposures to attain
proper exposure. Three shots with metered EV, under EV, and over EV exposure are
performed in that order with the N55.
Automatic exposure bracketing is performed with varied shutter speeds and/or
apertures.
Exposure Compensation
In a situation such as when your subject is strongly backlit, exposure compensation
enables you to intentionally compensate the standard exposure value measured by the
camera to create a desired effect. Exposure compensation of -2 EV to +2 EV in 1/2
steps is available with the N55.
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