f/11 vs f/16 is not about deviating from box speed. Just take a known good meter and measure in reflected light a number of sunlit scenes. Especially, but not only, landscapes with foliage.It is really rare for me to "need" more exposure than box speed.
Then he knows what he's doing, and no need to show us a digital version of his pictures. You gave better advice in your post #5 of this thread.Simple for me, the OP said so.