95MM Multi Coated UV Ultra Violet Filter for Tamron 150-600mm, Bower, Rokinon, Samyang, Vivitar 650-1300mm Telephoto Zoom, 500mm F/6.3 Mirror (T-Mount) Lens Protects lenses from dust, moisture, scratches, and other damage. These filters can be kept on the camera at all times. Provides basic reduction of ultraviolet light Helps eliminate bluish cast in images 95mm diameter