Poor Mans Distance Scale?
So could one mark their lens manual focus ring for maximum DOF? Say a mark with white pen showing where the focus distance is for maximum DOF! The reference mark could be done by focusing on something at Hyperfocal distance.
This could speed things up when photographing at maximu DOF.
I guess on a prime lens this would be fine, certainly a telephoto you would have to pick one of the extremes. Mostly likely at the smallest focal length makes the most sense