You have been very helpful. By your (and Benj) answer I've come to the conclusion that I should probably just rely on common sense.


Like you said, that is an "awful lot of contrast to deal with."


I figured a treeline in front of a sunset glow ought to show any CA / fringing if it was there. And it turns out it is.


But in not-so-extreme shots I've been very happy with this lens' performance. Maybe it's time to quit testing and just make pictures!


Thanks again you guys.