bmattock
Veteran
I have no connection with this seller, and I haven't purchased any of his adapters - yet. However, the Topcon RE -> M42 and the Leica R -> P/K look interesting to me. Apparently, you remove bits from the lenses, screw on his adapters, and mount the lens. He says un-do-able as well. Well, like I said, I have no personal info. But I know some of you guys like to adapt lenses just like I do, so there you go:
http://myworld.ebay.com/fish1917
http://myworld.ebay.com/fish1917