Nikon F3 Instruction Manual page 13

---------- Infocus ----------
2
3 4 5 6
---- Inside the viewfinder - -
I. LCD exposure information
2. ADR flnumber
3. Fine matte/Fresnel outer field
4. Microprism collar
5. Split-image rangefinder spot
6. 12mm<t> reference circle
Note : The meter reads the light aver the entire
focusing screen but is distinctly biased toward
the central 12mm¢ area.
19.
Set the lens aperture.
Turn the lens aperture ring
@
13
until the desired flnumber is oppo-
site the index mark on the lens . The
selected flnumber appears in the
viewfinder for convenient reference.