Pentax MV MV Manual - Page 25

focus

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in daylight or in brightly lit arenas and stadiums if you use a wide maximum aperture. (This technique does not work in low-lighting, as low lighting necessitates a slow shutter speed.) Depth of Field Control: Depending upon the aperture in use, different areas in front of and behind your subject will be in focus. This is known as depth of field and its effect can be varied by changing lens apertures. If you need to know the critical depth of fields refer to the depth of field scale and tables on pages 26 and 27. Often, however, you can get by if you remember the following. Maximum Depth of Field: The depth of field becomes progressively deeper as the lens is stop down to smaller apertures and is greatest at minimum aperture. Thus, if you desire both your,subject and background to be in focus, use a small aperture such as f/11 and f/16 the yellow LED Lights, take precautions against camera shake). Small apertures are also useful for critical close-up work, but for this, refer to a close-up photography guide. Out-of-focus highlights: The depth of field becomes progressively shallower at wide lens apertures, and is shallowest at f/2, f/1.7 or f/1.4, depending upon which is the maximum aperture of your ♦ lens. A shallow depth of field produces an out-of-focus effect which highlights your subject. Provided the green LED remains lit, you can obtain this effect by using a wide maximum aperture, even on a sunshiny day. •23

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in
daylight
or
in
brightly
lit
arenas
and
stadiums
if
you
use
a
wide
maximum
aperture.
(This
technique
does
not
work
in
low
-lighting,
as
low
lighting
necessitates
a
slow
shutter
speed.)
Depth
of
Field
Control:
Depending
upon
the
aperture
in
use,
different
areas
in
front
of
and
behind
your
subject
will
be
in
focus.
This
is
known
as
depth
of
field
and
its
effect
can
be
varied
by
changing
lens
apertures.
If
you
need
to
know
the
critical
depth
of
fields
refer
to
the
depth
of
field
scale
and
tables
on
pages
26
and
27.
Often,
however,
you
can
get
by
if
you
remember
the
following.
Maximum
Depth
of
Field:
The
depth
of
field
becomes
progressively
deeper
as
the
lens
is
stop
down
to
smaller
apertures
and
is
greatest
at
minimum
aperture.
Thus,
if
you
desire
both
your,subject
and
background
to
be
in
focus,
use
a
small
aperture
such
as
f/11
and
f/16
the
yellow
LED
Lights,
take
precautions
against
camera
shake).
Small
apertures
are
also
useful
for
critical
close-up
work,
but
for
this,
refer
to
a
close-up
photography
guide.
Out
-of
-focus
highlights:
The
depth
of
field
becomes
progressively
shallower
at
wide
lens
apertures,
and
is
shallowest
at
f/2,
f/1.7
or
f/1.4,
depending
upon
which
is
the
maximum
aperture
of
your
lens.
A
shallow
depth
of
field
produces
an
out
-of
-focus
effect
which
highlights
your
subject.
Provided
the
green
LED
remains
lit,
you
can
obtain
this
effect
by
using
a
wide
maximum
aperture,
even
on
a
sunshiny
day.
•23
♦