I just bought a 16mm lens. I noticed that the iris seems offset to one side. Also, at a full F2.8 I can still see the iris on one side. That only happens if I set the aperature manually. If I put it into full auto mode, the iris does complete disappear. Is this a known "feature" on the 16mm? I checked my 18-55mm and it isn't this way. Here's what it looks like at various settings. Wide open, notice the part of the iris is still there. {} Partially open, notice how it's offset to one side. {} Closed. {}
