When using wide-angle lenses, it is normal to see uneven polarization under certain circumstances, for example against a bright blue sky. This is easily solved, but let’s review first principles on polarizers.Polarizers work by filtering out sunlight. The angle of light filtered is controlled by rotating the polarizer itself.  You can control the strength by adjusting the line of sight to the subject relative to the sun. To eliminate this effect, you can rotate the filter 10-20 degrees or shift the angle of your shot by turning your camera toward the direction of the sun.  Easy peasy.