I have several old manual focus Nikon lenses that I use with my old non autofocus bodies. I love them and love the slight resistance on the focusing rings. I also have several auto focus lenses I use with my newer Nikon bodies (even with d*g**** bodies). I rarely mix autofocus lenses and manual focus bodies, but recently I had some extra time on my hands and decided to experiment. I noticed that several autofocus lenses offered better resistance when focusing while others had way to much play. The overall results were the same, except that the shots with the autofocus lenses on manual cameras were not as sharp as with manual focus lenses. Maybe this was due to the loose play of the focusing rings. This of course led to me wondering what most people use out there, manual focus or auto focus lenses? Are newer autofocus lenses "better" because they have more precise computerized manufaturing techniques and better coating? Are older manual focus lenses better because they were mostly glass and metal instead of 90 percent plastic (including lens elements)? What are your preferences, autofocus or manual focus lenses and why?