Very strange, either your interpretation of the lenses performance is off due to conditions or there is something wrong with the lens. I absolutely love my example of the lens, and sometimes I swear it is able to take sharper images than my 24-105 f...
I'll chime in on this post, been a long time since I made a comment on it. I still struggle a great deal with my 5D3, it's worse than the 5D2 by far. I've noticed that the 5D3 has a worse EV rating than it's brothers which is the excuse canon canad...
I too have seen tests on the new Sigma, and I think there is more in the aftermarket that may have just come out. There is a lot of positive talk about them, sadly I'm sort of always committed (justified or not) to brand name.
I'm a mechanic with 3 licenses, and very handy I've been told. Can't imagine any way for anyone to manufacture a retrofit for this application without replacement of the whole lens barrel and some elements even. Unfortunately, unlikely. But...we ...
Did you end up dealing with the IS noise? I was curious, I too have a lens that I swear makes more noise than it used to (change occured over a short period of time). Just wondering what has become of your search for answers.
