I got the PT-E05 housing for E520 yesterday. Of course, in terms of quality it beats using Ewa-marine or similar bags. Controls are nice and easy to use.
But the viewfinder concerns me. When I dive I use free-diving, low volume mask. It sits close the face and gives me a good angle of view. Despite the fact that I think it is pretty good mask for underwater photography, I still had some problems using viewfinder of D2H in a bag. But it seems like it is even worse with PT-E05. People who have Olympus housing, is it a problem when you dive? Of course, Live View is too slow to focus to be useful.
Thanks,
Eugene