"Holy Trinity" of Lenses - advice needed

I recently got a cheap adaptor so i could try my old 90mm Elmarit and omg it's awesome on the OMD. And manual focusing is so easy with the evf. I almost want to say easier than the split screen of my M9 because you see the focusing over the whole screen, not just a small box in the center.

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Nikon D800 | Olympus OM-D E-M5