I’m wondering in the case of a crowd in a stadium, I’ve to you use autofocus or manual? I’ll be using Canon 100-400, in 200mm zoom.

I read something like.. manual focus for the sky and autofocus for the crowd. Taking into account my knowledge in spherical panoramas I’m not sure aboute that.

I’ll appreciate any kind of suggestions.

Thanks!

I use autofocus for everything. If the crowd is far away like this:
http://gigapan.org/gigapans/45332
then manual focus would be fine as well. With people walking in front of the camera like this:
http://gigapan.org/gigapans/86283
I rather like having them be in sharp focus.