While I had this lens I tried it out on the Olympus E-M1 and took it downtown for a test run on a very murky and grey day. Not the best time to do this but I had little choice in the matter. Too many other things to do and places to be. Looking through the images that I didn't delete, they'rew actually quite sharp and contrasty. if it wasn't for the focusing issues I was having with this lens I would have been happy with it. For those that missed my posts about this lens, the problem was inconsistent and inaccurate focusing. I just couldn't trust that the lens had actually locked focus where I wanted it to focus. Sometimes it would show focus lock, but looking at the image on my monitor it was soft, blurry, or generally just out of focus. I just didn't see this when looking through the EVF, and that's the reason I sent it back for a full refund.