The FotodioX M42 Pro Lens Adapter with Aperture Flange for Canon EF-Mount Cameras is a high quality adapter that allows you to mount a M42 mount lens to a Canon EF-mount camera body. It features a brass construction with a stainless steel finish as well as the ability to focus to infinity. This works with a leaf spring system for a secure attachment of the lens to the adapter. Additionally, this adapter features an aperture flange for manually adjusting the aperture of the lens.
Although the lens will fit physically, automatic lens control and functions will not operate correctly while using this adapter. You can utilize aperture priority mode in combination with stop-down metering for automatic exposure control on your camera.