Thanks for this, this is the kind of specific information I am trying to dig up. I will get a Zuiko MC then and do a comparison. My MIJ is in literally perfect condition, as was the camera it came on. I guess that maybe there is potentially some lens alignment/collimation issue, but the surfaces of the glass look perfect and there is no sign of it having been dropped. The other explanation is that its been incorrectly focused by me during the testing, which is possible when I was fiddling with the MLU.
Originally Posted by wblynch
I used a hood on all the lenses, and was shooting at 1/250 on a Manfrotto tripod with a FOBA ball head.