LEE Filters 3 x 3" #11 Yellow Green Polyester Filter

The LEE Filters 3 x 3" #11 Yellow Green Polyester Filter is a basic contrast filter, primarily for use with black and white film, that moderately darkens blue and red tones, lightens green tones, and helps to subtly increase overall contrast. It also helps to better simulate a natural tonal response when working with panchromatic film under tungsten lighting conditions. There is an approximate 2.5x filter factor with this filter, requiring an increase of 1.3 stops for normal exposure.