Formatt Hitech 43mm Red 25 Filter

Greatly increasing contrast when working in black and white, this 43mm Red 25 Filter from Formatt-Hitech is used to significantly darken cool and blue tones in order to heavily emphasize clouds and produce more dramatic skies. In addition to being ideal for landscape use, this filter is also well-suited to infrared photography and can be used to make color separations with blue and green filters. There is an approximate 8x filter factor with this filter, requiring an increase of 3 stops for normal exposure.