Quote Originally Posted by MattKing View Post

I think you may have a body or lens plate that is bent or deformed. I cannot think of any other reason why the stiff retaining wire wouldn't press on it where it should.

Otherwise, I wonder if the focus problem could be related to the artifacts outside the image area that you referred to in your earlier thread: http://www.apug.org/forums/forum37/9...rames-why.html?
I thought so too Matt, but when I hold a steel ruler along it in every direction it is dead flat !! I discovered another poster somewhere whose retaining wire didn't press against the top of the lens plate, but they didn't say their plate was bent. As for the body being bent, that is nigh impossible (but I'll still double check that tonight) since it appears to be cast as a very solid block of metal.

The cause behind the out of frame artifacts isn't the lens but high intensity light bouncing inside the body, refer to the diagram I attached in my last post (#13) here.