Polarizer/Circular Polarizer\n- Essential general-use outdoor color filter\n- Produces deeper skies and minimizes reflections in black and white and color photography\n- Combine a Polarizer with a Red 25 for incredibly dramatic black and white landscapes\n- Can be rotated to achieve desired effect\n- Use the Tiffen Polarizer with the enhancing filter for more dramatic effects\n- Available for Wide Angle lenses\nA Circular Polarizer has the same effect as a Polarizer and is used on cameras with beam splitting metering systems commonly found on auto focus SLR's (for most 35mm auto-focus cameras see your camera manual).\nArea of sky most effectively polarized with a Circular Polarizer:\nPoint your index finger at the sun. With your thumb extended at a right angle (90°), rotate it around the axis of the index finger. It will point out the band of deepest blue from horizon to horizon.