Sharpest Lens for MFT at 200mm

Agreed on the 40-150mm as a surprisingly good lens, quite light and fast focusing on mFT. The 50-200 is quite a bit heavier and slower to AF on mFT but an excellent lens, probably better suited than legacy lenses designed for a wider image circle (i.e. 35mm format). I had both the non-SWD and the SWD and took a great many sports pictures with them for our local track team, including in tough situations for CA - many pole vault images which are especially liable to CA. I also had the 1.4 extender and it was a great combination for birds (which I sought out only now and then - longer would really be needed for serious birding, I suspect).
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W Alex Stewart