I am convinced that a lot of focusing problems with rangefinders are caused by bodies and lenses which are slightly off regarding calibration or by using lenses with focus shift.
I have sent several lenses to Leica and also my body once and after that focusing with the rangefinder I am at least as fast and precise as focusing manually with a SLR.
I even recommend to send the body with your fast lens to Leica and let them check it together.
Some of my lenses focused fine at shorter distances but not at infinity (my 135mm) my 50/1.4asph backfocused slightly when I bought it (new).
The Summarit 35 and 75 were spot on from the first minute.
The Noctilux, 35lux I gave up since even after calibration they suffered slightly from focus shift.
But once you are sure all lenses you use are spot on than focus is not as difficult any more. I believe many people think of user fault or general rangefinder shortcomings what are just calibration issues.
Of course a very good AF is even faster.
I have sent several lenses to Leica and also my body once and after that focusing with the rangefinder I am at least as fast and precise as focusing manually with a SLR.
I even recommend to send the body with your fast lens to Leica and let them check it together.
Some of my lenses focused fine at shorter distances but not at infinity (my 135mm) my 50/1.4asph backfocused slightly when I bought it (new).
The Summarit 35 and 75 were spot on from the first minute.
The Noctilux, 35lux I gave up since even after calibration they suffered slightly from focus shift.
But once you are sure all lenses you use are spot on than focus is not as difficult any more. I believe many people think of user fault or general rangefinder shortcomings what are just calibration issues.
Of course a very good AF is even faster.