Canon Powershot A520 Digital Camera Filter HD Multi-Coated 72mm 3 Piece Enhancing Filter Kit (UV Protector, Circular Polarizer & FLD Fluorescent Filter) - When Using 72mm Threaded Lenses - Includes Filter Case - Lifetime Warranty HD Multi-Coated 72mm 3 Piece Enhancing Filter Kit (UV Protector, Circular Polarizer & FLD Fluorescent Filter) When Using 72mm Threaded Lenses - Includes Filter Case - Lifetime Warranty UV Protective Filter: Prevents loss of sharpness and contrast by filtering out UV rays and Haze. Protects Lens from scratches, scuffs and smudges Circular Polarizing Filter Eliminates Reflections From Non-Metallic Surfaces, And Increases Contrast And Color Saturation FLD Fluorescent Filter: Eliminates that annoying greenish