When you guys are shooting portraits, what aperture do you generally use? I was always of the impression that you would tend to use a more open aperture to create a shallow depth of field, so you would stick to 2.8-1.4 maybe? Am I wrong on that? I am having a bit of trouble getting a nice sharp focus when there are 2 or more people in the picture. Specifically if they are of different heights. Would you change to a deeper DoF for that like say a 5.6 or something?