Nikkor on Leica
For years, I had planned on buying a Leica rangefinder with two Leica lenses (35mm f/1.4 wide-angle and a 90mm f/2 telephoto). However, my plans changed when I discovered that I could get a Nikon F2 body and two Nikkor lenses (35mm f/1.4 and 85mm f/1.8) for a lot less money.
However, for the times when I needed a small quiet film camera instead of a big noisy SLR, I used a Fotodiox adapter that allowed me to attach a wide Nikon lens to my Leica body. Since my Nikon lens did not connect to the Leica rangefinder, I used zone focusing. For example, on my 18mm lens, I set the focus distance to 1 meter and the f/stop to f/11 so that everything from about 1/2 meter to infinity is in focus.
I first used this technique back in the early 1970s when I had a Leica M1 that I used primarily on a microscope. Since the M1 did not have a rangefinder, I searched until I found two adapters, one allowed a Nikon F lens to mount on an "X" body and another adapter that allowed an "X" lens to mount on a Leica M body. I no longer remember what "X" was; however, unlike the adapters of today, I do remember that this "sacrilegious concept" did not permit focusing on infinity.