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Very good test. I did some testing with a bunch of 50s on m4/3 a while back...not a lot of overlap in my test (I had the Rokkor 50/1.4...but that's the only direct match). I put it up against native m4/3 glass, and the Oly 45 smoked them all in every category, but that's what you get with modern lens design. (I tested the OM 50/3.5 Macro, the Petri 50/2, the M.Zuiko 45/1.8, the PL 45/2.8 Macro, the nFD 50/1.8, the nFD 50/1.4, the Hexanon 50/1.7, 40/1.8 and 57/1.2, Rokkor 50/1.4 and the MZ 40-150 and Panny 14-45.)
From your test, you can see how good the Rokkors are across the field, and I'm surprised by how good the OM 50/1.8 is at wide apertures in the center. The FL 55/1.2 also looks to be a really strong performer. Thanks!