Pentax digital spotmeter - Color Reflectivity Guide; Color Reflectivity Warnings

LIGHT
REFLECTIVITY OF
7
COLORS DON'T BE MISGUIDED
BY COLORS
You
should
be
careful
about
colors when
using
the Digital
Spotmeter.
lf exposure
is
set
strictly
on
the basis of
a light
level reading
taken
from
a
color area, there
is a
good
possibility
that
the exposure
will be
incorrect.
This
is
because
reflectivity
is
different
for different
colors.
The ref
lectivity of
yellow
is
lower than that of
white, but
yellow
has the
highest ref
lectivity
of
all the
colors.
lndigo
and
purple
have
the
lowest
ref
lectivity. Consequently,
if a
light level
value
taken from a
reading of a
yellow
area
is set on the
exposure
calculator according to
the standard
index,
the
photograph
will
be somewhat
under-
exposed. To
prevent
this,
set light readings
taken
from the
various
colors
according
to
the
corresponding index
number listed in the
table
on
the left.
Reflectivity(%l
Index
No.
Red
(bright
red)
Orange
Yellow
(dark
yellow)
Green
(dark
leaf-green)
Blue
Indigo
Purple
6
6-7
B
Standard
I ndex
5
2-3
2-3
15-21
35-45
65-75
18-26
15-21
o- tz
6-
12
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