Nikon Camera N90 - Manual (Page 52)

stationary subject is in
_______ focus
With a stationary subject: Lightiy press the shutter release
button. When the subject is in focus, the lens stops moving, the
in-focus indication • appears in the viewfinder, and focus is
locked. If the subject moves, remove your finger from the
shutter release button, then lightly press it again to re-start
autofocus.
When a stationary subject comes into focus, a double beep
sounds (if set).
Subject is located closer than the closest focusing
distance of the lens. Move away from subject and
refocus.
Appears when TC-16A is used, alerting that the lens
focusing ring is not set at infinity (H- Set focus mode
selector to M, set lens focusing ring to <=<>, set focus
mode selector to S again, then refocus.