Nikon Camera N90 - Manual (Page 56)

stationary subject is in
___ focus
With a stationary subject; Lightiy press the shutter release
button to start autofocus operation. When the subject is in
focus, the camera’s autofocus motor (or the built-in motor of an
AF-I Nikkor lens) stops driving the autofocus lens and • lights
up. Unless you remove your finger from the shutter release
button, the motor will start driving the lens again to obtain an
in-focus picture if the focus distance changes.
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 (~). Set focus mode