Anti-reflective to reduce . Suitable for film, video and digital cameras. It is a professional quality screw-in metal lens . Using lens will greatly reduce the risk of and low contrast photos. The protects against light reflection tting the of the lens, and at the same for time will not the corner when using the wide feature of the lens. This rotating lens is designed for digital cameras with either built-in or interchangeable lenses. You can accidental damage to the lens, also avoid finger inadvertently lens , but also to some extent for the lens block the wind, rain and snow.