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TIPS
ON
UV
AND
INFRARED
PHOTOGRAPHY
Films Guide Number
For
UV
photography
The wavelength range of
UV
photography with the S8-140
is
from 300 to 400nm. Usable films are:
• General panchromatic and regular photosensitive
materials
• Color film*
• Special film for
UV
photography, such as Kodak
Spectroscopic
Type
103-0,
Type
103
-F, etc.
• Image will appear in a blue monochrome color.
Note that infrared films cannot
be
used for
UV
photog-
raphy with the
S8
-
140
.
For
infrared
photography
Usable films are:
• Kodak
High
-
Speed
Infrared Film
2481
• Sakura Infrared 750
• Kodak Echtachrome Infrared Film 2236
Film care
• UV and infrared photographic films are easily impaired
by high
temperatures-store
below
1Q°C
(50°
F).
• Load UV and infrared films into the camera
in
a dark
room.
• Take care not to expose them to infrared rays.
The flash unit's guide number relates the output of a light
to the sensitivity of a film, and
is
generally used only for
visible-light photography.
It
cannot
be
adopted for
UV
and
infrared photography, because the amount of light
re-
flected from subjects differs from that
in
visible-light
photography and because film
se
nsitivity cannot
be
deter-
mined for
UV
and infrared photography.
For the S8-1
40,
Nikon has determined the guide number
(shown
on
page 27) for
UV
photography or infrared
photography
as
follows.
Guide
number
for
UV
photography
Correct exposure, obtained with Kodak Spectroscopic
Type
103-0* film by using a Kodak 0-19 developer at
20°C (68°F) for six minutes,
is
used
to
determine the
guide number for
UV
photography.
• With other film
s,
the guide number
may
differ from that shown on
page
27.
Guide
number
for
infrared
photography
Correct exposure, obtained with Kodak High-Speed
Infrared Film 2481 *
by
using a Kodak 0-76 developer at
20°C (68°
F)
for
10
minutes,
is
used to determine the
guide number for infrared photography.
• Wi
th
other film
s,
the guide
number
may
differ from that shown on
page 2
7.
Spectrum
Energy
Distribution
See
charts
on
page
36
to
37.
31