Sunpaks line of filters help you improve image impact and quality. The Sunpak 77mm filter is meticulously crafted from the high-quality multi-coated optical glass optimized for todays cameras. And they are backed by a one-year warranty against defects in material and workmanship. Sunpak Digital Filters (UV) Ultraviolet/lens protection produces sharper, more vivid images and protects lens from scratches and dirt. This commonly used filter also reduces the effects of ultraviolet light and atmospheric dust and haze so that you can get improved contrast and color saturation from sunny landscapes, including mountain, marine and aerial scenes. Also used as a protection filter to keep the front lens element clean from dust, dirt, fingerprints and damage. The durable low-profile aluminum-magnesium alloy filter ring construction is ideal for wide-angle lenses and telephoto lenses.