The only way one is going to use a Leica M body for long lenses it with
a Visoflex. The choice of lenses and accessories is huge…. including
Novoflex and many others. It is not cumbersome or slow to use… if you
know how to use it…. no slower than any other manual focus rig.
Plus, it is a hell-uv-alot of fun, to tell you the truth. It, can be removed
in ten seconds to revert the M body for use as a standard rangefinder.