Fotodiox Reverse Mount Adapter Ring is made of premium grade aluminum. The lens can be solidly mounted on the lens in reverse for incredible macro photography.It works with all Canon Eos Ef mount camera bodies, digital or film. Any lens with a filter thread will fit on the thread side of the adapter. Or example, you can fit a Nikon lens with 62mm thread on a Canon Eos Camera. Dramatically expanding your choice in selecting lenses for this adapter.Tips: The reverse ring has no electric contact, so you will have to set your camera in manual focusing and manual exposure or aperture priority mood. Test shots may be needed for proper exposure..