Features: Metal mount lens adapter allows for LR Lens to fit on EF-mount cameras. The adapter allows you to use lens from old lens or other mount on your new camera and saves cost of buying lens. All metal precisions processing, anodized construction, solid and full of durability for long-term use. Allows focusing-infinity. Compatible for LR mount lens, suitable for EF-mount cameras such as for 1D 1DS Mark II III IV 5D Mark II 7D 40D 50D 60D 70D Digital Rebel T2i T3 T3i T4i T5i SL1 and more. Specifications: Material: Metal Compatibility: for LR Mount Lens Applicable Models: for 650D, 600D, 550D, 500D, 450D, 400D, 350D, 300D, 50D, 60D, 40D, 30D, 20D, 10D, 5D Mark II, 6D, 7D and more EF-mount cameras Note: Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different monitor resolution. Package includes: 1 Piece Adapter Ring