Thanks for the replay. You said that you have Nikon to M43 speedbooster that does not support IS, however, Canon EF to M43 has IS support and that's the one I'm going for.
This lens looks like good choice for stills not so much for video because it has some aperture flicker when zooming (according to some reviews).
I'm looking for a lens to use actually with the speedbooster not a native M43 lens. I want to get that extra light and crop reduction.