The metal outer layer, hard, wear-resistant,,, pollution resistant and high-performance optical glass, with high transmittance and advanced coating technology, it make your images wider and clearer, and make your pictures colorful This 0.35X professional conversion lens has high-definition optical resolution you install this lens on your camera, it will immediately multiply your zooming, provide you with wider view, and achieve amazing wide-angle photography Easily detachable lens for amazing close-up shots, such as collections, stamps, cones, documents, or flowers Full autofocus () compatible, full IR-compatible, for high resolution day & night