Pentax P3n P3n Manual - Page 39

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INFRARED INDEX MARK If you intend to take infrared photographs using infrared film and R2 or 02 filters, it is necessary to compensate for the difference between visible light focus and infrared focus. As shown on the right, note the subject-to-camera distance on the lens distance scale as you focus through the viewfinder and turn the focusing ring until that distance setting aligns with the red infrared index mark. The figure shows an example in which the subject-to-camera distance is set at infinity I °°). For details on exposure control, refer to the instructions accompanying the film. I M ° 3 10 '15 a 2 6 1.5 218" 8" 4 ail's"1 A' 22 101 8 5.6 4 ,T1 CO 10 15 E 2,6 II 8 I4 mu l1 26 t1 4 8 ^"Z A-'2211,1 8 5.6 4 215.7. 37.

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INFRARED
INDEX
MARK
If
you
intend
to
take
infrared
photographs
using
infrared
film
and
R2
or
02
filters,
it
is
necessary
to
compensate
for
the
difference
between
visible
light
focus
and
infrared
focus.
As
shown
on
the
right,
note
the
subject
-to
-camera
distance
on
the
lens
distance
scale
as
you
focus
through
the
viewfinder
and
turn
the
focusing
ring
until
that
distance
setting
aligns
with
the
red
infrared
index
mark.
The
figure
shows
an
example
in
which
the
subject
-to
-camera
distance
is
set
at
infinity
I
°°).
For
details
on
exposure
control,
refer
to
the
instructions
accompanying
the
film.
I
M
°
3
10
'
1
5
a
2
6
1.5
218
"
8
"
4
ail's
"1
A'
22
101
8
5
.6
4
,T1
CO
10
15
E
2,
6
8
I
I
I4
4
8
mu
l
1
26
t
1
^"Z
A
-
'2211,1
8
5.6
4
215
.
7
.
37.