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74
Measuring fill-in and ambient continuous light
The Flash
Meter III can be
used
to deter-
mine
exposure for pictures in which shadows
from
daylight
or other bright continuous-light
sources are
being
filled in with flash, since it
can
measure both
th
e
fill-in light and the
ambient surrounding
light.
To do
so
:
1.
With serviceable batteries properly installed
(p. 12),
and
arrangement made
for incident
or reflected measurement (p. 19),
set
the
film speed
for
the film in
use and
the
display-mode
se lector
to
"FNo ."
.
2. Set measuring time
(p
.
19) corresponding
to
camera shutter speed
to be
used
from
1
through
1/250
sec.
Remember
that
this
must be within
the synchronizing range of
the camera and long enough to cover th
e
total flash duration
with X
delay.
3.
Set the
measuring-mod
e
selector to "AMBI"
and
measure
only
the
continuous light
without the flash
.
Then
determine and set
the applicable
speed-aperture combination
to be used.
4. Set
the
mode
selector to
"COR D" position
for
sync.-cord readings with electronic or
M-bulb flash
or
"NON.C" for
cordless elec-
tronic-flash readings.
5
.
If
applicable, attach
desired
sync. cord;
flash
-unit cords
as indicated
on p. 39, Sync.
Cord II as on p. 40.
6
.
Then
adjust the
flash-to-subject
distance so
that a second reading taken with flash of the
flash -lit fill-in area calls for
the
same expo-
sure as in
4
above.
Balance between main-
lighted
and filled-in areas can be adjusted to
personal
taste
and
the
effect
desired by
varying conditions
to change the
second
reading:
A flash
fill-i
n
readout numerically
sma
ll
er
(e.g., f
/
5.6) than the
one
for
cont
i-
nuous
light
(e.g.,
f /8),
at which the camera
should
be
set, will produce
less
fill-in; a
numerically
larger
one, more
fill-in
.
7.
Make the actual exposure with
the
sync.
cord
properly
connected with the camera
for X-sync. and the camera shutter and lens
set for the ambient
light
as determined in
4
above.
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