Canon EOS-1Ds Mark III - EF 70-200mm 1:2.8L IS USM - iso400 - f3.5 - 1/1600 - Michael Grobe

This photo of a series had to be taken silently without the attention of the subject, otherwise the opportunity for this shot would have been destroyed. So the camera (EOS-1Ds Mark III) with the EF 70-200mm attached rested on my knees, while I was sitting. Zoomed to almost 200mm, live view enabled me to focus manually to precisly focus the shoe, the aperture wide open limited depth of field. Using autofocus would have had a great chance of missing the exact focus. It takes some practice to shoot hand-held with live view at 10x magnification for focussing, especially on a shaky boat.
The 100% crop below shows the actual captured detail.

100% crop - actual pixels