Awhile ago I attended the 40th reunion for my undergraduate class. Part of the program included attendance at an American football game. I had good tickets so decided to take my camera and see if I could get a few shots. Freezing the action is simple if one shoots with shutter times of less than 1/1250 of a second, but I wanted to get an image which imparted a sense of motion, so I shot at 1/160 of a second. The aperture was f/4.8. The lens is my old Nikon 70-200 f/2.8 VR with the 1.7x teleconverter installed and the body is a D7000. Focal length (with teleconverter) was 270mm.