Cool down warm tones with the approprate blue. These blue filters re-establish the balance of natural colors when daylight takes on orange tones at sunrise and sunset. Sandy beaches, snow, monuments, skycrapers, all recover their natural coloring. Lighter in tone than 020, 021, & 022, these milder effect filters are available in three grades. A023(82A) Very mild. A024(82B) Mild. A025(82C) Moderately stron