At f16 a 90 mm lens focused at 8 ft will be good from 5 ft to 26 ft. Screw it down to f22 and you are good from 4 ft to 500 ft. While f16 doesn't admit a lot of light it works -- like Frank said -- if you use fast film. HP5+ pushes easily to 640, and at that speed nominal exposure on a sunny day is 1/500 sec. (or 1/250 at f22). Knock off 3 stops for shadowless overcast and you are at 1/60 @ f16 or 1/30 @ f22.

Good shooting!

/s/ David