Exposure —continued, Setting the aperture – Nikon Camera F3AF User Manual

Page 45

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EXPOSURE —continued-

Setting the Aperture

The second factor in determining exposure is the shooting aper

ture. Aperture, or the opening formed by the diaphragm inside
the iens, controls the amount of light allowed to pass through
the lens and strike the film; it also controls depth of field (see
page 36 for more information). In low light, you are generally

required to use large apertures (indicated by f-numbers which

are low in numerical value, e.g. f/2.8), while in bright light, small

apertures are called for (e.g., f/16). The aperture ring # features
click-stops at whole f/stops but is continuously variable through
out its entire range. With the exception of a few special lenses,

Nikkor and Nikon Series E lenses enable full-aperture light

measurement regardless of the aperture setting. These lenses
have automatic diaphragms, meaning that the diaphragm stops
down to the preset aperture only at the instant of exposure. To

keep you fully informed, the aperture in use appears in the ADR

window ® inside the camera's viewfinder.