Pentax KX KX Manual - Page 14

Compose, Focus

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COMPOSE AND FOCUS While viewing through the viewfinder, turn the focusing ring until your subject comes into sharp focus. Depending on the type of focusing screen you have, there are two ways of doing this. Cross-microprism focusing system A cross-microprism focusing system consists of a Fresnel lens, made up of many concentric rings, with a microprism center underneath the ground glass. With this system, when your subject is in focus, the image in the microprism center will be sharp. If your subject is not in focus, the microprism will break the image up into many small dots. Split-image focusing system A split-image focusing system consists of a Fresnel lens with a horizontally divided screen under the ground glass. With this system, when your camera is held horizontally and the image is not in sharp focus, all vertical lines seen through the viewfinder will appear to be divided into upper and lower portions. To focus, simply adjust the focusing ring until the upper and lower portions are in perfect alignment. 12•

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COMPOSE
AND
FOCUS
Cross-microprism
focusing
system
While
viewing
through
the
view-
finder,
turn
the
focusing
ring
until
your
subject
comes
into
sharp
focus.
Depending
on
the
type
of
focusing
screen
you
have,
there
are
two
ways
of
doing
this.
Split
-image
focusing
system
A
cross-microprism
focusing
system
consists
of
a
Fresnel
lens,
made
up
of
many
concentric
rings,
with
a
microprism
center
underneath
the
ground
glass.
With
this
system,
when
your
subject
is
in
focus,
the
image
in
the
microprism
center
will
be
sharp.
If
your
subject
is
not
in
focus,
the
microprism
will
break
the
image
up
into
many
small
dots.
A
split
-image
focusing
system
consists
of
a
Fresnel
lens
with
a
horizontally
divided
screen
under
the
ground
glass.
With
this
system,
when
your
camera
is
held
horizontally
and
the
image
is
not
in
sharp
focus,
all
vertical
lines
seen
through
the
viewfinder
will
appear
to
be
divided
into
upper
and
lower
portions.
To
focus,
simply
adjust
the
focusing
ring
until
the
upper
and
lower
portions
are
in
perfect
alignment.
12•