BOLEX H16 SBM Instruction Manual page 16

The 1 A Skylight filter for colour films, tones down
excessive blue and Improves colour reproduction (in the
shade or overcast weather, for distant shots, when
filming in snow or at high altitudes). This filter requires
no diaphragm correction.
The 85 DaYli~ht filter for colour films is a conversion
filter. It ISused or filming in daylight with Kodachrome II
Type A armlclal ught him. When setting the diaphragm,
~ remember that colour film for artificial light, used with
~the 85 Daylight filter, has the same sensitivity as a day-
light colour film used without filter.
The Yellow 8 filter is used for increasing contrast
in
black-and-white film§,
The 96 Neutral Density ND 0.60 filter can be used
with both black-and-white and colour films and in no
way affects colour reproduction. As the ASA sensitivity
IS reduced tour times, the diaphragm can be opened
two stops. This filter is used:
1. When the lighting conditions and the film sensitivity
require an aperture lower than the smallest stop on
the lens.
2. When it is desired to reduce the depth-of-field in
order to achieve special effects (sharp foreground
against blurred backgrou nd).
14
or
Type
Open
divide
diaphragm
ASA
rating by
Kodak Wratten 1A Skylight - -
Kodak Wratten 85 Daylight
2/3
stop 1.6
Kodak Wratten 8 Yellow 1 stop
'2
Kodak Wratten 96 N D 0.60 2 stops
4
The filter effect depends on the type of film, its sensi-
tivity and the lighting conditions. The diaphragm correc-
tions indicated above should therefore be used only as
a guide.