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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 sensitivity
cannot be deter-
mined for UV and infrared
photography.
For the S8-140, 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.
• With 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
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