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TIPS
ON
UNDERWATER
PHOTOGRAPHY
I
The
results
you
will obtain
when shooting
underwater
depend
upon
the
transparency
of
the
water,
the
shooting
depth,
whether
or
not objects
are
floating
near
your
subject,
the
condition
of
the
light'
and
several
other
factors.
To take
good
underwater
photos,
you
must
have a
basic
knowledge
of
under-
water
photograPhY.
Water's
magnifying
effects
Light
is
refracted
in water,
so
underwater
objects
seem
approximately
250/o
larger and
closer
than
they
actually
are.
As a
result,
the
picture
angle
of
the
lens
in use
becomes
smaller.
For example,
the
picture
angle
of
a 35mm
lens
underwater
is almost
the same
as
that
of
a 50mm
lens on
land.
lllustrations,
underwater
photos,
and editorial
supervision
supplied
by
Akira
Tateishi,
Marine Art
Center,
Co.,
Ltd.
58
1 Size of
object as
it appears
underwater
(q/31)
2
Actual
size
of object
(L)
3
Actual or
measured distance
(l)
4 Distance
set on
lens
(3/41)
5
Your eye
6 Underwater
mask
Lens
focal
length and
picture
angle