I know this isn't a photography forum (ithough I do belong to one) - but shutter slap (aka mirror slap) just isn't a feature on mirrorless system cameras. They have the advantage of being that much smaller, and that includes lenses as well as sensors, because the lens (sans mirror) can be that much closer to the sensor reducing the size of both with no detriment to resolution. This is why I predict that DSLRs are in their dog days now, and it's only the likes of Canon and Nikon - with decades invested in their systems - that will delay the inevitable. I'm not even sure if Panasonic have a DSLR anymore, and also Fuji and Olympus are working hard to make the mirrorless systems the de facto standard. There, I've said my piece!