Quote Originally Posted by tcadwall View Post
AF-S is supposed to designate not only that the lens has internal focusing, but that it is also instantly over-rideable by turning the focus ring.
I wonder about that. Did Nikon actually ever come out publicly and say that? It may be that everybody assumes that is the case because all AF-S lenses until recently have had that feature. But until recently all AF-S lenses have been at the higher end of the scale, now they are drifting down to consumer class.
It may simply be that the S designates that the lens has a Silent Wave Motor, no more and no less.