I like those foggy town scenes by Jerry Tenn. as well.
I did some further 400 II + 2xTC BIF exploring today, and I must say I continue to be impressed by how well that combo works.
Here\'s one example with last of the fall bokeh.
Handheld 1DX + 400 f/2.8 IS MkII + 2xTC MkIII.
