reddish if exposed under tungsten illumination.
Figure
1-13
shows
a
comparison between film sensitivity and light quality.
Figure 1-13.
Comparison between film sensitivity and
light quality
b. Using Filters to Alter Spectral Quality of Light.
Whenever
possible, the source of illumination and the color emulsion should be
matched. However, situations sometimes arise that make it necessary to use
color emulsions and light sources that do not match. Acceptable results can
be obtained, provided filters are used to alter the spectral quality of the
light entering the camera.
There are four categories of filters that
perform this task:
Light-balancing (correction) filters.
Color-compensating (CC) filters.
Special-purpose filters.
Filters for color photography are more subtle in coloration than those used
for black and white photography.
Let's look at each type of filter for
color photography.
(1) Conversion Filters. Conversion filters are dense filters and are
used for exposing tungsten-type color films under daylight conditions and
daylight film under tungsten illumination. Figure 1-14 indicates the filter
to use for different lighting situations.
1-25
SS0514
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