It always seemed to me that Kodak films had a little more "room" at the bottom than some others, which may have been because others took more advantage of the spread allowed in the ISO speed rating. In photographing orchestra members and soloists from my seat in the middle, I depended on consistent shadow speed from roll to roll, batch to batch, and always got it from Kodak, but I used only Tri X. Automatic exposure was useless because of the lighting.