Light rays which are reflected by any surface become polarised and polarising filters are used to select which light rays enter your camara lens. • They allow you to remove unwanted reflections from non-metallic surfaces such as water, glass etc. • They also saturate colors and increase contrast. Sunpak 62MM Circular Polarizer Features Creates dramatic sky/cloud contrast. Saturates colors without changing color balance. Mount rotates to control amount of effect. Increases contrast equally well with black & white film. Height: 0.4 inches Compatibility: 62mm