K&F Concept KF-NFEM [Lens Mount Adapter for SLR Cameras, Black, Body Side: Canon EF-M, Lens Side: Nikon F] I just bought this recently, so it's practically new, but since I attached it to a camera once, I'll consider it as "like new." This adapter is for attaching Nikon lenses to Canon cameras. I ended up deciding to buy new lenses, so I no longer need this. No instruction manual came with it when I bought it. Only the case and the adapter itself.