Best teeny tiny camera options?

oh, been meaning to ask, given the short distance but rather tall\narrow view I need to capture, what would be the best lens FOV option to choose?
If I go with a IPC-HDBW4231F-A there, looks like my choices are only 2.8mm, 3.6mm or jump to 6mm. I assume I'd have to set it up in a "corridor mode" if it has that option, to be able to see human head height and package on the ground view.