
The B+W 72mm Redhancer (491) Filter, made from didymium glass, is a filter with very special transmission characteristics. Designed to strengthen the reddish components of orange, near red or brown subjects, it is very popular for use in nature & landscape photography. It is particularly effective in conjunction with a polarising filter, controlling a potentially bluish-grey veil & for increasing colour saturation, e.g. to capture fabulously vivid scenery during the colourful autumn season. The use of colour reversal film is recommended, because the automatic correction applied by printers to colour negatives can erroneously interpret the desired effect as a colour cast & reduce it by filtering it out.