The #21 Orange Filter from Tiffen is a filter designed to build contrast in black and white photography and creates separation between the tones. The filter absorbs blue and blue-green colors, rendering blues darker such as for skies in landscape or aerial photos and water in marine shots.

Key Features:
– Strong contrast in B&W images
– Ideal for landscape, marine, or aerial photography
– Absorbs blue and blue-green colors
– Renders blues darker