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Minolta IIIF - Page 25

Minolta IIIF
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Filters
The
Color
Meter
IF
provides
readings
for
two
types
of
filters:
LB
(light-balancin
CC
(color-compensating)
filters.
Light-balancing
filters
are
used
to
increase
or
reduce
the
color
temperature
of
light.
by
which
the
filter
changes
the
color
temperature
is
usually
specified
as
the
mired
(micro-reciprocal
degree)
shift
of
the
filter
The
LB
index
provided
by
the
Color
Meter
HF
is
the
mired
shift
value
of
the
required
filter.
Positive
(+)
mired
shifts
decrease
the
color
temperature
of
the
lig
more
yellow;
negative
(-)
mired
shifts
increase
the
color
temperature,
making
it
more
blue.
The
filter
corresponding
to
a
displayed
LB
index
can
be
found
by
referring
to
the
)
filters
and
The
amount
t,
making
it
able
on
the
back
of
the
Color
Meter
IHF,
which
lists
Kodak
Wratten
filters
corresponding
to
LB
index
values,
or
to
a
chart
included
with
filters.
Remember
that
filters
can
be
combined
if
necessary
to
obtain
the
required
mired
shift.
For
example,
for
an
LB
index
of
+149,
you
could
use
an
85B
filter
(mired
shift
value:
+131)
together
with
an
81A
filter
(mired
shift
value:
+18).
The
Color
Meter
IIIF
can
also
provide
direct
readout
of
Kodak
Wratten
filter
numbers,
for
both
light-balancing
(81
and
82
series)
and
conversion
(80
and
85
series)
filters.
The
81
and
82
series
Kodak
filters
provide
minor
shifts
in
color
temperature;
the
80
and
85
series
provide
much
larger
shifts.
When
more
than
one
filter
must
be
used
to
obtain
the
required
mired
shift,
the
Color
Meter
HF
displays
both
filter
numbers.
The
table
below
shows
the
relation
between
the
LB
index
and
the
LB
filter
number
displayed.
LB
Index
and
Corresponding
LB
Filter
Number
-87
-80
s
a
|
7
to
-108
97.
72
`
LB
index
`
a
AVS
192
to
-182
"181
to
-170
-169
to
-158
|
_"157
to
-147
|
=
Io
187
|.
to
"127
to
-118
+5
to
+18
|
80A
80A
80A
80A
80A
80A
808
80B
80C
80c
Boc
80D
++
+++
80D
+
80D
820
SCH
8
Filter
number
80D
82C
82B
82A
82.
82
82A
82
82A
82
LB
index
+14
to
+22.
+23
to
+30
+31
to
+38
+39
to
+46
+47
to
+56
`
+57
to
+65
`
+66
to
+75
+76
to
+85
+86
to
+94
+95
to
+104
to
+109
+110
to
+116
+117
to
+125
+126
to
+135
+136
to
+144
+145
to
+153
+154
to
+161
+162
to
+169
+170
to
+177
_+178
to
+188
>
+189
vum
|
ep
S
81A
BIC
DD
`
_BIEF
o
oo
__8tEF
+
D
`
BEF
+
81A
85C
85C
+
Di
85C
+
81A
85C
+
81B
`
BS
o
85
+
81.
858
z
85B
81
+
BIA
85B
+
81B
85B
+
+
81D
+
ae
:
E
be
-
81C
23

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