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Kodak RETINA IIIC

Kodak RETINA IIIC
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F
OCUSING
SCALE
other
objects
in
the
picture
area,
both
in
front
of
and
behind
the
subject,
will also
be
in
focus.
Thi
s
is
"range
of
s
harpne
ss"
or
"depth
of
field."
To
permit
instant
reading
of
the
depth
of
field
for
any
lens
opening
and
distance,
a
DEPTH-OF-
FIELD
SCALE composed
of
numb
ers
corresponding
to
lens
openings
is
arra
nged
on
either
side
of
the
focusing
index.
FOCUSING
INDEX
Suppose
you
hove
set
the
aperture
to f
/8
and
the
distance
to
about
9 feet;
this
is
how
you
read
off
the
depth
,
To
the
left
of
the
focusing
index
the
line
marked
with
the
figure 8 feor·
responding
to
the
lens
opening)
is
opposite
6 feet.
To
the
right
of
the
index
another
line
marked
with
the
figure 8
points
to
16
feet.
This
tells
you
that
with a
setting
of
about
9
feet
at
f/ 8
you
have
a
depth-of-field
zone
extending
from
about
6 to
16
feet
.
Within
this
zone
everything
will
be
sharp
.
23
DEPTH-OF-FIELD SCALE

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