Karl Winkler wrote:

I'm considering those, but the long end is short of the 100mm minimum
end of that 100-400 zoom. I may end up considering the 70-200 f/2.8 or
f/4, but I've seen what that 100-400 can do, and it's quite a lens.

Have you seen comparisons between the 100-400 and the 400 F/5.6?

Admittedly I have not personally compared these lenses, but Michael
Reichmann has:

http://www.luminous-landscape.com/re...tten-400.shtml

Per Inge Oestmoen, Norway