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TIPS
ON
UNDERWATER
PHOTOGRAPHY-
continued-
Woter's
effects
on
colors
The
farther
you
descend
from the
water's surface,
the
more
the selective
filtration and
light absorption
of
the
water
reduce
visibility.
Red
is the
first color
to
be
absorbed,
orange
and
yellow
follow close
behind
(refer
to
the chart).
At
'10m
(33ft),
everything
takes on
a blue-green
cast.
In addition,
depending
upon the
turbulence
of the
water,
visibility
may be
reduced even
further by silt
and
microscopic
particles
of
plankton
in suspension.
Therefore,
below
approximately
5m
(16ft),
use
a
speedlight
to
give
the subject
additional
illumination
and
to
restore
natural
colors,
especially
those
in the
red
portion
of
the spectrum.
For more
information
about
flash
shooting,
see
page
50.
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1. Red absorption
increases
at
greater
depths.
Sub-
ject
looks bluish
even at
short
distances.
2. Red
absorption
decreases
at shallower
depths
and
at smaller
distances,
3.
Subject
looks increasingly
bluish
at
greater
dis-
tances,
even
at shallow
depths.
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Color
Absorption Underwater
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color
is absorbed