Given all the problems the EOS-1D Mark III had with its auto focussing, you would have thought that Canon would have pulled out all stops to make sure their new flagship was with out fault. Rob Galbraith takes it out to test and the results certainly aren’t as good as I would have expected.

Rob Galbraith DPI: An analysis of EOS-1D Mark IV autofocus performance.

Photo by Rob Galbraith/Little Guy Media