Filters for black and white photography perform a variety of filtration effects including contrast control, enhanced skin tones, tonal corrections and more dramatic landscapes. Although originally intended for use with black and white film, these filters can also be used as a creative tool in color imaging. The Yellow 12 filter is a "Minus blue" and cuts haze in aerial work. This filter also reduces excess blue of full moon in astrophotography. This filter fits lenses that have a 49mm filter size.