16
S
ETTI
NG
THE
LE
NS
APERT
U
RE
----------------------
The
aperture scale
of
the standard lens has
calibrations from f/1.9 to
f/r6.
To
adjust the
aperture according to the light intensity, shift
the aperture setting lever
in
either direction.
•
The
red indicator on the lens mount or
the diaphragm setting lever
IS
used for
reading the aperture setting.
•
The
larger the aperture value the less light
is
transmitted to the film plane.
The
cali-
bration on the scale
is
arranged
so
that
setting to the next larger value reduces the
volume
of
incoming light by half. If, there-
fore, the scale
is
adjusted in succession to
the next larger
va
lue, the volume
of
light
transmitted through the lens would
be
de-
creased in progression
of
r/z,
r/4,
r/S,
r/r6
and
so
on.
• Adjustment
of
the aperture scale to a point
mIdway between the settings would give an
intermediate f-value.
•
The
aperture may be set either before or
after
fi
lm advance.
• Because the diaphragm mechanism
of
the
MIRANDA
Sensorex
is
coupled to the
metering system, refer to sections on the
CdS exposure meter and t;nethod
of
light
measurement for further details on aperture
setting .
I
II
I .. • I
C)OOOOOO.
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