Uncle Frank...Have you got your ears on?? I found this to be very helpful for me. I just got the 105 2.0 yesterday and love it. But the 85 1.4 is...well..words can't say how much I like the 85. Here is the link: http://www.stacken.kth.se/~maxz/defocuscontrol/ A very nice person at dpreview provided this for me. I'm just doing the same. Comments welcome.