K&F Concept design and produce full range of lens adapters to fit lenses of Canon, Nikon, Pentax, Olympus, Leica, Contax Yashica, Minolta, Tamron, T2, C mount, Exakta, M39, M42, Pentacon etc used on Camera bodies of Canon, Nikon, Sony, Fujifilm, Pentax, Micro 4 3, Leica, M42, Cinema C mount etc.
Although it offers close up pictures only, but I like it. After I had tested it deeply, I found out that the set up is a very good macro device.
Leica M Lenses to Nikon Camera Mount Adapter
Understand what you are buying with this adapter.
The item itself is as-advertised.However, if you buy this to use a Leica-M lens on a NIkon body, you will NOT be able to focus to infinity. The cameras have different distances between the lens mount and the focal plane. Due to this difference you can only focus out to a very short distance with the Leica-M lens-like a macro lens.