well i certainly know what you mean about not having the eyes for manual focusing, as im right there with you! however i will say that focus IS practice--at least in a measurable degree. im getting pretty good with the rf focus of the rd1, and i was pretty good in my day with split screen focus film cams, even though my eyes have always stunk. with the biometar, i was really good with the autofocus confirm on my old 5d. thats why i recommended it for the auto confirm on the Df. getting that right is just practice. and the lowlight ability of the Df allows for DOF apertures that the 5d couldnt dream of, allowing for more 'in focus' area. just something to think about.