[faint]

Do "landscape people" love barrel distorted trees?
And does that sharp Sigma 20mm f1.4 have lesser "MTF  resolution"?

If you read my previous post more carefully, you will realize that I'm not taking a side which aberration is better than the other. What I'm stating is that there are certain physical laws that come into play when you are projecting 3D image on a 2D plane, and in the case of a wide angle lenses, over-correcting distortion is at the cost of softer corners, even when you do that in software.

What I'm saying is that there is probably certain balance, where you can decide for yourself which is more important to you - sharp corners or distortion-free image, and produce the desired effect with few tweaks. I'm not sure if over-corrected lenses will give you that opportunity.

I don't see what's the problem here. And what's so special about Sigma 20/1.4 clearly eludes me.