Akira, I just had a pixel-peeping look to the original shots. Both have been taken at f/3.5, 400 ISO, and relatively low speeds (1/10, 1/8s). The distant shot is reasonably sharp, but falling rain diffuses everything a little bit. The close-up, bottom-up shot is much better. Attached are a center, two bottom corners and the top edge 100% crops. The very distant parts are sure less sharp, and DOF is not infinite, but all that is quite usable. My beloved 28/2 AI won't have corners that clean at such aperture...