Thank you so much, I'm gonna get the metabones for now... anyway, is gonna be a big improvemnet, since Im still working with a Canon 550D
So, from this point of view I guess that that a meatbones is a good deal since is almost half price than Olympus 12-40mm. And I can use my 17-50 and I with IS.
About sharpness... shooting in 4k and downscaling to HD I guess it will provide me and increment of quality image, right? Or even add a sharp filter will do the trick as well?
So sorry for the duplicate post...