Nikon Camera F3AF - Manual (Page 110)

How to Read the EV Chart
Section A of the chart shows the usable EV range depending
on the lens' maximum aperture in full-aperture metering, while
it also indicates the usable EV range tor aperture settings in
stop-down metering. Section D shows the value for the ASA/ISO
film speed, Section B the aperture settings for various film
speeds, and Section C the shutter speeds to match any film
speed/aperture combination.
In practice, you will find that it is generally the high end and the
low end of the metering range which require a careful check.
The EV range of the Nikon F3AF encompasses most lighting
situations, and it is only under very dim or very bright picture­
taking situations that you need pay any special attention.
Full-aperture metering
Use the Nikkor 50mm f/1.4 lens and a film speed of ASA/ISO
too
as an example. By referring to the f/1.4 column in Section A
and the EV value indicated for ASA/ISO 100 in Section D, you
will find that the F3AF's EV range in this case is 1 to 18.
If the lens is set at f/5.6, refer to Section B and single out the
f/5.6 indication for ASA/ISO 100. Go diagonally down until the
protruding line intersects with Section C's vertical line for a
shutter speed of 8 sec. (the F3AF’s slowest shutter speed).
From this point of intersection, follow the horizontal line that
leads to the Section D’s EV value for ASA/ISO 100, and you
will obtain an EV range of 2. Start again from the f/5.6 indication