That is a very good question how does the old timer(pre AF time) do it. :thumbsup: :dunno:
Because last time there were no AF or AF-S to compare with. Plus there are focusing aids like microprism and split image... plus lots of fast lenses which snaps easily into focus very obviously... I think it has to do with the design of the focusing screen also. Now the laser matte screens are hard to judge focusing with, even DoF cannot be easily seen. Most of the time the DoF on the image is much thinner than what we see through the VF.