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I
Objects
underwater
appear
closer
than
they
actually
are.
For
instance
,
if
the
estimated
camera-to-
subject
distance
underwater
is
1
meter
(3
.3
feet)
,
the
actual
distance
is
1.
33
meters
(4
.3
feet)
.
The
distance
scales
on
the
exposure
calculation chart
and
lenses
are
marked
by
estimated
distances
underwater
.
When
you
estimate
the
distance,
read
the
flash
shooting
distance
range
from
the
chart
directly.
In
TTL
flash
mode
Read
the
flash
shooting
distance
range
in
the
"M
Full
"
column
on
the
left
of
the
scale
.
For
example,
when
shooting
a
subject
underwater
at
estimated
0.5
meter
(1
.6
feet)
using
ISO
1
00
film,
set
the
aperture
to
f/22
or
larger
(smaller
f-number)
to
get
the
correct
exposure
.
When
taking
pictures
with
the
arm
removed
from
the
bracket
Open
the
aperture
one
or
more
steps
wider
(f/16)
than
that
(f/22)
read
in
the
"M
Full
"
column
on
the
left
of
the
scale
.
• Important
When setting aperture, check the flash
shooting distance range first.
To
obtain the
best possible color reproduction, set the
aperture to the larger f·number if available.
+Note
42
Usable film speed range
in
TTL mode:
ISO
25
to 1000 for the Nikonos
RS
ISO
25 to 400 for the Nikonos V
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I
I.
4
3
1 Size of object as it appears
un
derwater
2 Actual si
ze
of object
3 Distan
ce
se
t on lens
4 Actual or measured distance
150100
oPo