User manual
Table Of Contents
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Depth-of-field
scale
The near and
far
limits
of
acceptable sharp-
ness
can be
determined
from
the
depth-of-field
scale
on
the
lens barrel.
With
the
lens focused
at
a given
point,
the
image
will
be in
satisfactory
focus
from
the nearer value
to
the
farther
value
on the distance scale
indicated
by
the
depth-of-
field
scale marks
for
the
aperture
to
be used.
For
example,
if
a
50mm
lens
is
focused
at
5m
(about
16
ft
.' and
the
aperture
is
f/8,
the
appropriate graduations
to
left
and
right
of
the
index on
the
depth-of-field
scale
indicate
ac-
ceptable sharpness
from
about
3.4m
to
9.7m
(approx.
11
to
32
ft.'.
infrared
index
For
proper
focus when
making
pictur
,
es
with
infrared
radiation,
first
focus
your
subject
with
visible
light
as
described above,
then
attach a
red
filter
and
turn
the
focusing ring
to
the
right
to
align the
poi
nt
of
proper
focus
on
the
distance scale
with
the
index
designated
with
small red
"R"
in
the
depth-of-field
scale. When
making
color
pictures,
follow
the
manufac-
turer's
recommendations
to
set focus.
7 1015 30
CD
2 3 5
10
I
II
It
III
I
16
84
,8
16
"J
1.42
2.8
4
5.8
8
11
16
ft
m
37