Minolta Flash meter IV - LIGHTING RATIO CALCULATIONS

LIGHTING
RATIO
CALCULATIONS
The
meter's memory
function
lets
you
check
the
lighting ratio
(relative
brightness)
of
various
light
sources.
By controlling the lighting
ratio,
you
can
vary
the
amount
of shadow
detail in
a
photograph.
For
example, lighting
ratios
f
rom
2:1 through 4:1
produce
lighter
shadows
which
are
desirable in color
portraits.
Whereas
lighting
ratios
of
6:
1
and
higher
produce
much
deeper
shadows and
are often
used
in
dramatic
black-and-white
portraits.
1.
Attach the
optional
flat
diffuser.
tr
Z.
Set
switches on left
TRAST",
"ExlN",
"NORM
3.
Set
the
measuring
mode to
"AM
B
l"
"CORD",
or
"
NON.C".
4.
Set
the
function
switch to
"T
lM
E
".
side of meter to
"CON
",
and
"SINGLE".
'
Ji
ry
#t
#
REuAr-u
E
rA l-Hlil
VryI
-
o
Any shutter speed
can be
used.
In
average
illumina-
tion, a
speed
around
1160
sec.
should
produce
acceptable
resu lts.
Use
a
f
aster speed
in
very
bright
light, and a
slower
speed
in
low light.
o
Shield the
diffuser
from
other light
sources
with
your
hand
to their
light from
striking the
flat
diffuser
and affecting the
reading.
5.
Hold the
meter next
to
the subject
so that
the
diffuser's
surface
is
per-
pendicu
lar
to
the
main
light
sou
rce, then
press
the
measuring
button
to
take
a
reading.
6.
Press
the
memory
button
to
store
the
read-
i
ng.
7.
Repeat
steps 5 and
6
to
ta ke
a
read
ing
of the
other
light
sou
rce.
tta
-4.-34.
-2
. -1 .
0
.
1
.
2".
3.U.
rtuL/'
n
a,
AMBI
LtLt
|
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'r"
r,r
l.i
Ll
I
''
ExlN.
[
,
rlv
],,.,,1
ii
ll
I
p
RECALL
f**
I
cv
I
rso
I
FNo.
I
<r
<b
o
The
pointers
on the
contrast scale will
indicate
the
difference in
illumination with
quarter-stop
accu
racy.
llt
-4.-3s. -2
.
-'l
.
0
.
,l
.
2^. 3.4
.
JtlA'
E
n
Lf L,
r
AMBI
,-;;-\
7.';l
Ll
I
\ ErlN.
39