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The
scale on the ASA/
ISO
dial has numbered settings
for
speeds from ASA/ISO
12
to 3200.
Two
dots be-
tween each number stand for intermediate settings,
such as 64,
80, etc_ The 64, 100 and 400 settings are
indicated
in
red_ The table gives the speeds for all
intermediate settings,
To
set the film speed
in
use, lift
up the dial and rotate it until the desired number
(or
dot
representing the film speed) click-stops opposite
t
he
index dot
5.1;
_
ASAI
ISO
is
a numerical rating of the film's sensitivity
to
a given amount of light. The higher the number, the
greater the sensitivity, and vice
versa_ The film's ASAI
ISO
is
indicated on the cartridge itself, on the film
carton and on the data sheet packed inside.
This
dial can also be used to compensate exposure,
as
in
the following example: with ASA/ISO 100 film,
set the dial to 50 to overexpose + 1 step; to 25 for
+ 2 steps; to 200 for
-1
step; to 400 for
-2
steps.
After compensated shootings, be sure to return the
dial to the film's original speed
41