Clearly shows that the image is greatly softened by diffraction when stopped down to f/32 - as you'd expect. If I were interested primarily in making the mailbox a sharp as possible I'd definitely use f/11 and not f/32. But there's more to the story.; see part 2 - http://www.pbase.com/image/101209734 - (this closeup of a mailbox is a 100% crop from the part 2 image).