Just received this lens for my mFT system. Manual focusing of course, but it's good fun. And it's possible for me to do it even. My eyesight isn't what it was.
I think I'll get some more cheap ones off ebay, maybe a 25 and 50. Then I'll have everything covered I think.
Musn't forget the adapters too. For anyone thinking of doing this, just give it a try, it really is good fun.