Useful for minimizing reflections and glare and enhancing the overall color and tonal saturation is the 37mm Ariel Circular Polarizing Filter from Vu Filters. Utilizing HiVu Polarization Optics it filters out light that has become polarized due to reflection from a non-metallic surface, resulting in a noticeable increase in the saturation of skies and foliage, as well as clearer imagery when photographing in hazy conditions. A circular polarizer differs from a linear polarizer in that it supports full use of a camera's autofocus and auto exposure functions.