Pentax LX LX Manual - Page 33

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INFRARED PHOTOGRAPHY Because black & white infrared film records light rays which focus differently than light in the visible spectrum, when shooting it is necessary to adjust the focusing ring accordingly. After focusing normally on the subject, note the subject-camera distance on the lens distance scale and turn the focusing ring until that distance setting aligns with the orange infrared index mark. In the top photo, the lens is focused at infinity (OO) for normal photography; in the bottom photo it has been adjusted for infrared photography by moving the infinity mark to the orange infrared index. NOTE: Compensation is not required when using infrared color films. ti ,gy m co111.70_ 16 8 4 4 8 • A322 ,11 8 5.6 4 2/ r u m co 10 s't r Jr to - I- ATI 111 16 84 4 8 2 u fi n 11 85 4 * -1 31 •

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INFRARED
PHOTOGRAPHY
Because
black
&
white
infrared
film
records
light
rays
which
focus
differently
than
light
in
the
visible
spectrum,
when
shooting
it
is
necessary
to
adjust
the
focusing
ring
accordingly.
After
focusing
normally
on
the
subject,
note
the
subject
-camera
distance
on
the
lens
distance
scale
and
turn
the
focusing
ring
until
that
distance
setting
aligns
with
the
orange
infrared
index
mark.
In
the
top
photo,
the
lens
is
focused
at
infinity
(OO)
for
normal
photography;
in
the
bottom
photo
it
has
been
adjusted
for
infrared
photography
by
moving
the
infinity
mark
to
the
orange
infrared
index.
NOTE:
Compensation
is
not
required
when
using
infrared
color
films.
fi
ti
,gy
m
co
10
11
.
7
_
16
8
4
4
8
A
3
22
,11
8
5.6
4
2/
•
r
u
m
co
10
s't
- I-
ATI
11
1
2
u
16
84
4
8
Jr
to
n
11
85
4
*
-
1
r
31
•