I don't really find that to be true myself, and tests didn't support that idea to the best of my recollection. Good full aperture performance was often expensive, just for one example. May be more true today than the 70's, 80', and into the 90's. That doesn't mean you need that to take good pictures, or that your pictures will be better for better performing lenses, but that still doesn't make all lenses equal.
Originally Posted by blockend