B+W Filters : Black and White Multicoated Filters

B+W Black and White Multicoated Filters

Because early black-and-white films did not render colors in the gray tones that corresponded to the brightness perception of human eyes, the use of yellow- and yellow-green filters was simply indispensable.Today's panchromatically sensitized black-and-white films no longer require such a correction, at least not in daylight. In artificial light, however, the increased red component can distort the rendition in gray tones in critical cases by rendering blue tones too darkly and red tones too brightly. This can be remedied by the use of a light blue filter with halogen light or a medium blue filter with incandescent illumination.

Yellow- and yellow-green filters can bring more brilliance to landscape photographs and createbetter differentiation of green tones in vegetation.Yellow- and orange filters can magically transform cloudlets into clouds and cloud formations, and red filters can even raise them to dramatic thunderstorm strength or create moonlight effects.

A very simple rule can be used to determine which filter should be used: To lighten a subject color, use a filter of the same color. To darken a subject color, use a filter of a complementary color. When two objects with different colors but with the same effective brightness are to be better differentiated in a black-and-white photograph, use the filter of the same color as the color that is to be rendered lighter in the photograph.

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