I'm looking to adapt my Canon 50mm f/0.95 rangefinder lens to the new EOS R mirrorless body. Having looked at both pieces they would pair beautifully! My "Dream Lens" retains its original mount and I have no interest in a mount conversion (i.e. Leica M) because it's still enjoyed on a Canon 7 rangefinder. At this time there's no commercially-available adapter for this combination, and nobody has one in the works, so an adapter will have to be custom made. I have contacted Gus Lazzari, DAG Camera Repair, and Camera Clinic looking for someone to do the work, so far without success. Conceptually, I can envision shaving a few millimeters from the front of an M39 to EOS R adapter and then attaching the mounting flange from a donor Canon 7. Done properly, it would accept both the 50/0.95 and M39 lenses. If anyone can refer me to a technician who can handle this job it would be most appreciated!