-TIPS
ON
UNDERWATER
PHOTOGRAPHY-confinued
-,
Water
'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 visibil
ity.
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, depend
in
g 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
porti
on
of the spectrum. For more information
about flash shoot
in
g, see
pag
e
50.
60
30
n~
~
<-~
~
1.
Red
absorption increases at greater depths. Sub-
ject looks bluish
even
at short distances.
2.
R
ed
absorption decreases
at
shallower depths and
at smaller distances.
3.
Subject looks
in
creasingly bluish at greater dis -
tances, even at shallow depths.
Color Absorption Underwater
_ = color
is
absorbed