While this university venue has very good lighting available, I cannot count on the lighting manager to always use all of that capability. An image stabilized f/2.8 is insurance for less-than-full lighting being provided. In this case, I was able to use ISO 640 and an f/4 aperture for a little more depth of field.
Camera and Lens Settings
75mm f/4.0 1/100s ISO 640 4896 x 3264px