The cokin p series p035 warm 81d filter is designed to add additional warmth to portrait photography for a more ldquosuntanned lookrdquo whilst removing bluish casts this filter eliminates excessive amounts of blue from open shade on extremely clear days and is stronger than the 81a 81b and 81c controlling the bluish coloration that affects daylight film the filter is known to be ideal for general landscape photography on cloudy days this product is a light balancing filter which r