B + W 77mm Kaesemann Circular Polarizer Coated Glass Filter KIT For Canon EF 100-400mm f4.5-5.6L IS USM B + W 77mm Kaesemann Circular Polarizer Coated Glass Filter Shoot deep blue skies with outstanding clouds and richer, more saturated color. Highest quality Multi Resistant Coating assures outstanding sharpness & maximum color neutrality. Lessens reflection from non-opaque surfaces (water, glass, lacquer). Filter factor is 2 - 3 stops. Includes; Street & Field 6-Filter Pocket - Lens Pen Cleaning Tool - Ace Photo Micro-Fiber Cleaning Cloth.