What would a "real" correction consist of? You cannot go back and redesign the lens!
Of course Peter.
I'm asking what does the SW do.
Something like asking what does, say, AI Sharpen to sharpen a soft picture, the idea behind it.
The fringes disappear. Does this affect the whole image or something? Something like that
I wouldn't have to redesign a lens, I just sell my Ferrari and buy a better one. And carry it