Pictures are better than words:
nikon nikkor 55mm 3.5 K D810 15mm 3.5 ais 15mm 5.6 ai body by Rafael Batlle, on Flickr
nikon nikkor 15mm 5.6 D800 Lake hodges scrub oaks by Rafael Batlle, on Flickr
san juan capistrano 15mm qdc ai 5.6 f5.6 nikon nikkor D3 3 by Rafael Batlle, on Flickr