User manual
Table Of Contents
Even
though
the
new
emulsions
have
been
made
more
sensitive in
the
green, yellow
and
red
regions
of
the
spectrum,
they
all
have
their
greatest
sensi-
tivity
in
the
blue
viol
et
and
ultraviolet regions.
In
this respect
the
sensitivity of
photographic
materials
differs
from
that
of
the
human
eye.
The
eye has its
greatest
sensitivity
in
the
green,
is
less sensitive
to
blue
and
violet,
and
is
not
at
all sensitive to
ultraviolet. Therefore,
in
order
to
have
the tone
va
lues
in
a
landscape
picture
almost
the
same
as
the
eye sees
them
in
the
original subject, it
is
necessary to use a filter.
The
filter allows
the
free passage
of
certain
colors
and
absorbs others
either
wholly
or
in
part.
Some
of
the
more
commonly
used filters are:
the
Kodak
Sky
Fi
lter,
Kodak
Color Filter,
Kr,
K2,
G,
and
A
Fi
lters.
Other
filters
are
described
in
the
Eastman
Kodak
Company
publications:
"The
Photography
of
Colored
Gbjects,"
"Wratten
Light
Filters,"
and
the
Kodak
Data
Book,
"Filters
and
Other
Kodak
Lens Accessories."
The
Kodak
Sky
Filte
r gives
correction
of
the
sky
and
records clouds
that
may
be present,
without
necessitating increase
in
exposure.
The
Kodak
Color
Filte
r,
the
KI
and
the
K2
Filters
are
yellow
correction
filters for
photographing
through
haze;
for
darkening
the
sky to
record
clouds
that
may
be
present; for
photographing
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