Constructed with multi-coated optical glass, water-proof, oil-proof, providing you clear, high-resolution images with minimal distortion and for glare Design 67mm 0.43X super wide-angle fisheye lens with macro portion Wide application, macro lens is for microcosmic such as prickly pear, circuit board, for butterfly, flowers, files, stamps, antiques, parts Housing frame part is magnesium-aluminum alloy, which has high strength, good toughness, and durability It can conveniently attached to the front of lens and allows you a wider of view, taking wide-angle photography