Nikon F3 - Manual (Page 28)

Exposure compensation dial
Another way to correct exposure is to use this dial. Push
the locking button @ while rotating the dial. The dial is
graduated in one-third stop increments. —1 and —2 indi­
cate one and two stops underexposure, whereas -f 1 and
+ 2 indicate one and two stops overexposure.
At ASA 6400, the compensation extends to only -1; at
ASA 12, up to
-I-
1. The following table indicates the
recommended settings for various subjects. After use,
make sure you set the dial back to “0."
Original Repro-copying & slide-copying
Type of lilrn'^.,,^
B&W
color photo
Letters or figures on
light background
Letters or figures on
dark background
m icrography
Panchromatic film
for general use
No com pensation
necessary
1-1/3 stops -2/3 stop -t 1 stop