B000FG6COC Sigma AFI960 EX DG 86mm Single-Coated Circular Polarizer Filter

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Used to select which light rays enter your camera lens, and which light rays are reflected
Removes unwanted reflections from non-metallic surfaces such as water or glass, and saturates colors providing better contrast
Eliminates ultraviolet rays to remove haze from outdoor shots without affecting the overall color balance
Single-coated circular polarizer, with an 86-millimeter thread size, and a filter factor between 2.3 and 2.8 or 1.3 f-stops
Constructed of high-quality optical glass