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.
I bought the M42 to Fujifilm (FX) adapter for a bunch of old M42 lenses I had lying around. Honestly blown away by the quality if this product. It seems like it's all metal, the build quality is very good. The packaging is nice and good for storage.$25CAD just gave me access to 4 new prime lenses for my favourite fuji cameras. Great product.