Made of good quality aluminum alloy, the lens is solid, and rustless. This 2X professional telephoto conversion lens has high definition optical resolution. Put this lens on your camera and it instantly doubles your zoom. You just screw this lens on front of existing lens or adapter. Easy to install and remove. Waterproof, scratch-proof, oil-proof. Exquisite design, lightweight and portable. It fits any camera with 37mm lens thread. 46 mm front thread for filter installation.