A polarizer is different than most filters in that it is composed of two pieces of glass， mounted independently inside a round frame so that one can be rotated relative to the other. As it is rotated， it increasingly cuts out glare and haze. With an SLR， you can actually observe this change through the viewfinder. Polarizers reduce glare from water， glass， or any non-metallic surface. You can also use a polarizer filter to darken blue skies.                                    Features            Improve the versatility of your camera<br>Suitable for all DSLR， Lenses， Digital Still， Video and DVD Camcorders<br>CPL (Circular Polarizer Lens) filters reduces unwanted reflective light from your photos<br>CPL filter blocks out polarized light which significantly improves photo qualities<br>Photograph blue skies with a deeper intensity<br>Makes colors appear more saturated and reducing or eliminating glare and reflections especially during sunny weather<br>Brings out colors and intensify contrast<br>Serves as coated lens protector to prevent dust and scratches<br>Diameter: 58mm<br>Color: Black<br>                                                                                                Package Includes            1 x 58mm Circular Polarizing CPL Camera Lens Filter<br>