You have distance to the focus plane on the focus ring and f-numbers on the aperture ring.
The ranges visible in the second picture show the approximate depth of field at various apertures.
Eg. in the photos the aperture is set f/11, the focus at 20m, and the markings for "11" show that the depth of field goes from ~4m to infinity (ie. everything from 4m and beyond should be relatively sharp).


