• Model Number: Canon EF Mount Lens Compatible with Nikon 1 Camera; Weight: 1.6 oz (49.9 g); Material: Brass, aluminum alloy; Note: This product is not compatible with Canon lenses from the STM series such as EF 50mm f/1.8 STM / EF 18-135 IS STM. ) • MF & Infinite: No electronic contacts on the top of the ring, and the installation method is set manually. Easy to install and remove. When using this product, the focus is MF and the aperture adjustment is basically a full manual. Endless (Please turn off the camera when you install the adapter. ) • (Durable & Lightweight) High-definition processing technology creates a luxurious metal surface and greatly improves durability. Lightweight and compact for easy carrying • [Caution] Please be aware that other functions do not operate properly. If you are wearing it too tight or too loose, please contact us