Nikon Camera N90 - Manual (Page 228)

ISO film speed
The international 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
Rash 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 SB-25, SB-24 and SB-20 provide
seiectable manual outputs (full, 1/2, 1/4, 1/8, 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-601M/N6000,
F-401X/N5005, F4-series and F-801 s/N8008s cameras.