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UTILIZING THE LENS DEPTH OF FIELD
1.
What is meant by
Depth
of Field
T
o check
the effects of
the
apertu re you
have
select
ed -
how
we
ll
you
have blurred
out th
e
background
o
r
how wi
d
e
the
d
ep
th
of sha rpness
is
·
all
you
have to do
is to look thro ugh the viewf
ind er,
because the
apertu re w
ill
c lose
down
t
o
the
size
yo
u
have
se lected as you
press
d
own
the E
xposu re
Meter
Switch.
T
hus,
t
he
sharpn
ess of a
p
ict ure exte
nd
s over
a co
ns id
erab le range
both
in
front of and
beh
ind
the
point
th
e lens is
focused on.
T
his
zo
ne
o
f
sha
rpness
is
refe
rred t
o as
the
d
ep
th
of
fi eld.
The width
o
f
the
depth
of
field
differs
depend ing
on
the lens
foca
l
length,
subject
di
stance, an
d
lens
aperture.
CD
T
he higher
th
e aperture number
(the
sma
ll
er the
apertu
re)
,
the
wi
d er
the depth
of
field.
T
he lowe
r
the aperture number,
the narrower
it
becomes.
@
T
he
l
onge
r
the
foca
l
length of
the
lens
,
the
narrower
the depth
o
f fi eld
,
and
the
shorter
i
t
is
A
-
57
-
the w
id
er
it
becomes.
®
Th
e farther
the
di
stance
the
lens
is focused
o
n,
the
w
ider the depth
of
f
ield.
@)
Th
e zone of sha rp ness
in
front of
the p oint
of
sharpest focus
is
n
a
rr
owe
~
than
the
zo
ne
o
f
sha rpness
behind
the
sa
m
e
po
in
t.
®
Example A shows
th
e
aperture
full
y open.
Examp
le
B
shows
th
e aperture
stopped
d
ow
n
to
f/16.
2.
How
to
see
the Depth of Field
A
ll
the
interchangeabl
e
lenses
of
the FU
JI
CA
ST701
are prov
id
ed with
a
depth
of
f
ield
indi
cato
r
on
th
e
lens
barrel. F or exampl
e,
if you
are
using
an
Fl.
8
55mm norma
l
lens
and
have set
th
e
apertu
re
at
f/8
and
the
di st
ance at
15
feet (5m), everyth ing from
about
11
.5 feet
(3.5m) to
28.5
feet
(8.7m)
wi
l
l
be
in
sharp focus.
B
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