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. This 2X professional telephoto conversion lens has high definition optical resolution. Put this lens on your camera and it instantly doubles your zoom. It fits any camera with 52mm lens thread. 62 mm front thread for filter installation. Made of good quality aluminum alloy, the lens is solid, durable and rustless.