The 81 Series of filters control the bluish coloration that affects daylight film. The mild 81A warms scenes shot on cloudy days. It can also remove excessive blue from the effects of electronic flash. Good for general scenics when the photographer wishes to remove the bluish cast from open shade or just add warmth to the photograph.
This filter measures 85 x 85mm and fits the Cokin P series holder.
Filter factor 1.2 (+1/4 stop)