Hi, I just got hold of my new EM1 and I am looking at this CV lens in earnest. From reading your link, I think the version II, does have improvement if you read the link article carefully, though not specifically saying so. I do think CV knows its problem with version 1 and I infer they are some improvement. Well, I am not too sure but think it has. Thinking very dearly about adding this lens, have never played with anything over f 1.4!