Nikon F3 - Manual (Page 70)

IMPORTANT!
46
The camera body you have purchased is packaged sepa­
rately from the lens. Before mounting the lens, check if it
is capable of Automatic Maximum Aperture Indexing
(AI) operation with your camera body by verifying that
the lens' aperture ring is fitted with a meter coupling
ridge as illustrated at the right. Note that the ”
Ai"
mark
on the cover of the instruction sheet provided with AI
Nikkor lenses is your assurance that the lens offers the
AI feature.
If the lens is fitted with the meter coupling ridge, it is
fully capable of full-aperture exposure measurement and
automatic maximum aperture indexing; to attach it to the
camera, follow the directions provided in the BASIC
OPERATION section of this instruction manual.
If the lens is non-AI, stop-down exposure measurement is
reguired with the camera body's meter coupling lever
locked up; to lock up the lever, follow the directions in
the "Meter coupling lever" section of CONTROLS IN
DETAIL.
Note: The modification at reasonable cost of most non-AI Nikkor lenses
having both an automatic diaphragm and meter coupling prong is
available for the convenience of Nikkor lens users. For further infor­
mation concerning lens modification, please contact your local autho­
rized Nikon dealer.