[Leica] Received M8 & lenses repaired/adjusted by Solms

[pklein at threshinc.com (Peter Klein)]

Robert:  I'm sure it does, if you focus wide open and the diaphragm 
closes down to shoot..  But you would probably only notice it with fast 
lenses, like a 50/1.4 stopped down to f/2.8 or f/4.  By f/8, depth of 
field covers the shift. 

Since focusing with the reflex is often a bit less accurate than a 
properly calibrated rangefinder, you might not notice the pattern and 
blame the slightly out of focus shots on some other factor.  But focus 
shift is simply a property of fast lenses.

I honestly wonder how many of the complaints of "back focus" we hear on 
DSLR forums is really focus shift.

--Peter

> Peter, Does this focus-shift problem occur with R lenses on the DMR?  
> Robert