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BASIC OPERATION-continued-----------
14
Set the film speed.
•
Lift up the ASAIISO
film speed ring
@
and
rotate
it
in either
direction
until the white index dot
@
is opposite the film speed in
use.
The
scale
®
on
the ASA/ISO dial has
settings
from
ASAIISO 25 to
3200.
Two dots between each number
stand for intermediate
settings, such
as
64,
80,
etc.
As a convenience
,
the most popular film
speeds
of
64
,
100,400,
and
1000
are
in red
.
12
The film
speed,
in the form of an ASAIISO
number,
is
printed on the
film carton
and also on
the
cartridge
itself.
This number is a numerical rat ing of the film
's
sensitivity
to a given amount of light
;
the
higher the
number,
the greater the sensitivity, and vice
versa.
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