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.
Cautionary Note - I ran across this item while looking for Nikon F mount (read: SLR/DSLR) adapters for my m4/3 camera. This adapter is not for SLR/DSLR lenses. It is for the old Nikon S-series rangefinder (e.g. SP, S2, S3, S4, ...) lenses made in the 1950s. These cameras had a dual mount, internal for 50mm lenses and external for the others. This adapter appears to have only the external mount to work with only the wide angles and telephotos, but not with the 50mm lenses.