Not sure if this subject has been discussed before, but after a search I have found nothing.
I have a 50mm Summilux VerII that is showing some odd focusing.
Wide open and close focus the lens is spot on.
However it's suffering from back focus at medium - infinity focus.
I thought it could be the range finder in the M8, however shots with my 90 Tele Elmarit are showing up perfect.
Was the lens originally designed to be perfect wide open at close focus and slightly off at medium - infinity?
Or has this lens been modified, or in need of calibration?
As shown here the focus was on the light pole, though the branch which was five feet behind appears to be in focus.
50 Summilux on M8, focus around 30 feet.
50 Summilux on M8 at f2.8, focus around 30 feet.
90 Tele Elmarit on M8 at f2.8, focus around 30 feet.
50 Summilux on M8 at 2.8, focus infinity stop on lens.
90 Tele Elmarit on M8 at f2.8, focus infinity stop on lens.
50 Summilux on M8, wide open close focus. Spot on.