Nikon N90 AF Instruction Manual page 141

ISO film speed
The intemational standard for representing film sensitivity. The
higher the number, the greater the sensitivity, and vice versa. A
film speed of ISO 200 is twice as sensitive as ISO 100, and half
that of ISO 400 film.
LCD
Liquid Crystal Display. The N90 has two: the panel on top of
the camera body and inside the viewfinder.
Manual flash
Flash output is controlled manually in the manual flash mode,
while flash output power varies automatically according to the
selected aperture in the auto flash mode, Some Speedlights
including the Nikon S8-25, S8-24 and S8-20 provide
selectable manual outputs (full,
1/2, 1/4, 1/S, 1/16,
etc.), while
others provide full manual output only,
Matrix metering system
An advanced camera light metering system using a multi-
segment sensor and computer; available in the N90 and other
Nikon SLRs such as the Nikon F-601/N6006, F-601 M/N6000,
F-401 xlN5005, F4-series and F-S01 s/ NSOOSs cameras,
Release-Priority for autofocus
Shutter can be released anytime (Le" even when subject is not
in focus), Convenient so you do not miss an opportunity to take
a picture and are not concemed with absolute focusing
precision,
With N90 camera body, Release-Priority is given to Continuous
Servo AF while Focus-Priority is given to Single Servo AF.
However, the Electronic Organizer can change the priority to
perform Focus-Priority Continuous Servo AF or Release-Priority
Single Servo AF,
Single Servo AF
Once the subject is in focus, focus is locked, Useful for
recomposing the picture.
SLR
Single Lens Reflex. A type of camera in which you look through
the camera's lens as you view through the cameras viewfinder.
Other camera functions, such as light metering and flash
control , also operate through the camera 's lens.
TTL
Through-the-Lens. Most SLR cameras have built-in meters
which measure light after it has passed through the lens, a
feature that enables exposure readings to be taken from the
actual image about to be recorded on film , whatever the lens
angle of view and regardless of whether a filter is used or not.
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