help with new lens
What kind of wild life? Big animals, angry animals like Moose, Little critters large game that is semi-tame? Sounds like you had the right focal length. Lots of rumors about an updated 400 f5.6 but they have been circulating for years ... maybe something will be announced this week. What about a 2x TC for your 70-200 or the 300 f4? Lots of people love the 100-400 for wild life, I had the Sigma 50-500OS and it was pretty good at f8-11 at 500mm.