Features： [Compatibility] Specially designed replacement for Nikon F/AF AI AI-S camera lens to Canon EOS EF/EF-S mount cameras, like EOS 1DS, 1D, 5D, 7D, 60D, 600D, etc. [Infinity Focus] Support infinity focus, easy to check focus through the viewfinder and adjust focusing, no difficulty to shoot clear pictures. (The viewfinder is not included.) [Manual Aperture Control] The aperture control can be set manually, convenient for effective control of the depth of focus. [High-Quality Material] Made from premium aluminum alloy with exquisite workmanship, has high precision and good quality, rust-proof and impact-resistant. [Easy to Install] With a red dot on the adapter ring as a mark, extremely smooth surface, and excellent fitness, easy and quick to install. Specifications： Color: Black Material: Aluminum alloy Lens Compatibility: Replacement for Nikon F/AF AI AI-S camera lens Camera Compatibility: Replacement for Canon EOS EF/EF-S mount cameras Product Size: 6.6 * 6.6 * 0.8cm/ 2.5 * 2.5 * 0.31inch Product Weight: 19g/ 0.67oz Note： The position of the infinity focus mark [∞]of the telephoto lens or super telephoto lens is shifted slightly to the positive side, enabling focus adjustment even when focus shift is caused due to temperature changes. The shift range is denoted by an L-shaped line. Package List： 1 * Camera Lens Adapter Ring