Opteka 37mm High Definition II Circular Polarizing + UV (0) Ultra Violet Haze Multi-Coated Glass Filter Kit The Opteka &lt;b&gt;Circular Polarizing Filter &lt;b&gt;is designed for shooting in bright sun, at beaches, snow, etc., Controls bright light entering lenses for a better balanced color image, Darkens blue skies and reduces reflections from non-metallic surfaces Increases saturation in the blue range of the spectrum, i.e. skies, water, Mount rotates to control amount of effect The Opteka &lt;b&gt; UV (0) Ultraviolet Haze Filter&lt;b&gt; gains brilliance and disturbing blue casts are avoided, designed to maximize day and night shots by providing maximum light transmission, Penetrates haze, adds warmth, and protects your valuable lens from scratches, dirt, fingerprints, etc. Multi-Coated and heat treated glass to eliminate distortion and minimize light reflections, High-index / low-dispersion optical glass with HD2 Technology Brand New, Lifetime Warranty