Now that I'm using the Phase One P65+ I've noticed that my non digital 150 isn't as sharp as it once was. I was using the Schneider APO-Symmar L lens 150/5.6. I've upgraded that to the Schneider APO-Digitar M lens 120/5.6.
I did a very quick test on a flat surface. The digital lens does much better with sharpens and retaining detail in the highlights. I photographed at f-16 rather than the optimal f-8 or f-11. I wanted to test the lens how I would be using it, which is mostly f-16 - f-22.