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Rosco CalColor Filters This series of color effects lighting filters is designed specifically to the spectral density of color film. CalColor filters adjust the transmission of these color components at the individual light source so you can correctly predict how your film will render. For instance, a CalColor 90 Green selectively enhances green transmission by reducing the effective blue and red transmission by three stops. Each color is designed in four densities: 15, 30, 60 and 90, corresponding to the familiar ½, 1, 2 and 3-stop calibrations.
