Depends on what you mean by "tested." I have the lens and feel it's extremely sharp. I use it with both a Alpa and Phase DF and Phase P65+ back and very happy with the results. I make pretty big prints--usually about 40x60 or there abouts so have developed a good feel for resolution and sharpness. I "feel" it's one of their sharpest if not the sharpest Schneider Kreuznach LS lens, which I think is saying a lot. However, I stopped using lens resolution chart testing a long time ago, so can't help you there if that's what you're needing.
Dennis
