Nikon N4004s - Manual (Page 73)

GLOSSARY
AEL (Auto Exposure Lock): AEL is recommended for shooting
small dark subjects against a bright background or for shooting
dramatic sunset scenes. When AEL is used in program, shutter-
priority or aperture-priority auto exposure mode, camera auto­
matically switches to centerweighted metering.
AF illuminator: When existing light is below a certain level
and the camera is set for autofocus mode, the SB-24/SB-23/
SB-22/SB-20’s AF illuminator turns on automatically and
provides enough subject contrast to enable the N4004s
autofocus system to function as though it were daytime.
Centreweighted metering: In manual mode, or when the AEL
button is used in auto exposure modes, the camera automati­
cally switches to centreweighted metering. This secondary
metering system places special emphasis on brightness within
the 12mm-diameter central area of the viewfinder, making the
N4004S exceptionally versatile for a wide variety of subjects.
Decision Master System: Nikon’s exclusive optoelectronic
system integrates camera and lens computers to provide full
automatic control of all camera and lens operations, from auto­
focus to auto exposure, built-in TTL flash, built-in motor drive,
DX film setting, film loading and power rewind. It even automati­
cally carries out such advanced techniques as exposure
compensation and balanced fill-flash.
54