Recently i tried different apertures of my Panasonic 20mm to understand better its depth of field. I set the camera at the minimun focus distance, locked the focus, 2s timer, 200 iso, and shot at different f-stop, from 1.7 (max aperture) to f16 (min aperture). This is the result in a gif:
To me the best shot is at @5.6, where i have the doll completely in focus.