●Ultra-slim frame, only 5.3 mm thickness to avoid vignetting on wide-angle lenses. Extra tough aluminum-magnesium alloy frame ensuring great durability and jamming prevention. ●Double glass sides with 28 multi-layer coatings waterproof, anti-oil, anti-dust, anti-soil, scratch-resistant. Protecting the camera lens from all around. ●Circular polarizer filters help to remove unwanted reflections from non-metallic surfaces such as water, glass et. Enhance the color and contrast. Especially be used on blue skies and white clouds photography. ●Filter glass material is importing Japanese AGC glass, nanometer coating ensures the light transmittance with no effect on image sharpness. ●NOTE: This filter is compatible with all 105mm lenses. Please verify your cameras lens thread size before ordering. This number is always preceded by a "Ø" (diameter) symbol. For example Ø105= 1057mm lens thread size. ●New and old packages are sent randomly