Housing frame part is magnesium-aluminum alloy, which has high strength, good toughness, and durability. Wide application, macro lens is for microcosmic such as jewelry, circuit board, for butterfly, flowers, files, stamps, antiques, parts, It can conveniently attached to the front of lens and allows you a wider of view, taking wide-angle photography. Constructed with multi-coated optical glass, water-proof, oil-proof, providing you clear, high-resolution images with minimal distortion and for glare. 0.45X wide-angle lens with macro portion, for cameras & camcorders with 58mm size lens filter thread.