Very soft focus when using EF 2x III TC with EF 400mm f/2.8 + CanonR5
The r5 autofocus for animals, while it could be better, is still very good. It was able to correctly identify the eye of the Kestrel in this picture, however, when using the EF 2x III TC the focus was very soft as seen in the shot below.I was using a...