...oops...just checked in with my friend...he's shooting a 85 f1.2!!! Even with that big an aperture, it's not uncommon that he's at ISO6400 or more.
On thing he mentioned (since white balance was mentioned as a tangent)...was that a single WB was difficult to pin down because the cycling of mercury vapor or fluorescent lights give you varying WB that can only be corrected in PP.
Last edited by ChrisF; 09/16/13.
