[JJ_SO]

.... Do also note that for optimum results you have to stop down a FF lens 3 stops or so to get optimal results - there are a few exceptions, but not so many. With MFT that often is only 1/2 or 1 stop...

 

Sorry, then you have the wrong lenses.  -_- Of course it depends what you call "optimal results" but sharpness in the middle has to be there from wide open otherwise it's a bottom of a bottle, no lens. For some pictures nothing else than sharpness in the middle is the right thing, so stopping down will mot improve the result if I want nice blurr around.

 

And I doubt very much after looking at some resolution results for µ 4/3 lenses, that it's enough to stop down one f-stop for the same "optimal results". Compare the RAWs, then we'll talk again. I agree with most of your explanations, especially your view about equivalence, but please don't try to make µ 4/3 better than it really is (which is already pretty good)