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-EXPOSURE-continued---------------
1/2000
111000
11500
1/250
1/1
25
1/
60
2.B
4
5.6 B
11
16
Relationship
Between
Shutter
Speed
and
Aperture
The
amount of light reaching
the
film plane
is
determined
by
a
The
best combination will depend
on
the results
you
want.
Use
combination of
the
shutter speed
and
the
lens
aperture. A fast shutter speeds
to
freeze motion;
use
slow speeds
to
pro-
shutter speed of
1/125 sec. lets
in
twice
as
much light
as
a set- duce a deliberate
blur.
Also,
small apertures give greater depth
ting
of 1/250 sec.
and
only half
as
much light
as
1/60
sec.
An
of
field, while large apertures restrict
the
zone
of sharp focus
to
aperture setting of
f/11
lets
in
twice
as
much light
as
f/16, half
the
main
subject. (For more detailed information about depth
as
much
as
fiB.
Thus,
if
the
correct exposure for a particular
of
field, refer
to
page
36.)
picture-taking situation
is
1/125
at
f/11
,
then
1/250
at
fiB or 1/60 A good
rule
to follow
in
preventing camera shake
is
to
select a
at
f/16 will give
the
same exposure. minimum shutter
speed
which
is
the reciprocal of
the
focal
The
table above illustrates
the
interrelationship between shutter length of
the
lens
in
use
.
For
example,
when
using a normal
speed and aperture. 50mm
lens,
select a speed
no
slower
than
1/60 sec. (the closest
number
to
1/50).
For
a 200mm super-telephoto,
use
no
less
than
1/250 sec.
and
so
forth.
34