Features:The ring is made of good quality material, anti-rust and durable.Precision machining, ensures perfect fit for your cameras, easy to install.Supports manual focus and aperture, infinite focus, enable you to achieve manual exposure. Make it possible for c-mount lens become compatible for Canon EOS/EF cameras.Useful accessory for photography lovers.Specification:Material: Aluminium alloyColor: Shown as pictureSuitable for Canon EOS/EF camerasApplicable for C-mount lensWeight: Approx. 30gPackage List:1 x Lens Adapter RingNotice: 1. Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other function will not operate correctly while using this adapter. 2. In this case "Stop-down mode" will need to be used when metering since the lens doesn't have the ability to have its aperture controlled by camera body. 3. You can shoot with manual mode or aperture priority mode.