Enlarge the 100% crops to see the influence of 0.08mm focus adjustment.
Just looking at left side crop, it seems to be 'in focus'. But only the right side crop shows the rich details a 80 MPx digital back can offer.
Perfect focus provides visibly more depth in the texture.
250% crops. Click to enlarge.
These samples were taken during Photokina. Focussing typically took 60 seconds after placing the objects.
Lens: Schneider APO Digitar 4.0/80mm
Back: PhaseOne IQ180