TheB+W #8 Yellow (022) Filteris a basic contrast filter, primarily for use with black and white film. This medium yellow filter slightly darkens skies, helps to cut through haze, and improves overall contrast. It is the most common contrast filter for black and white photography, producing an accurate tonal range and compensating for the blue sensitivity of panchromatic film. There is a 2x filter factor with this filter, requiring an increase of 1 stop for normal exposure. B+W filters are constructed from high quality Schott glass for increased optical clarity and color fidelity. They feature a brass filter ring for durability as well as jamming prevention. Yellow contrast filter for black and white film subtly darkens skies, cuts through haze, and gives greater contrast overall. Produces accurate tones in order to compensate for panchromatic film's blue sensitivity. Constructed from high quality Schott glass for optical clarity. Brass filter ring helps to prevent jamming and provides additional strength.