Saturday night’s final of the women’s 100 meters at the 2012 Olympic Trials involved a photo-finish image to determine third place. Timers use two camera positions for photo finishes: one on the outside of the track and one on the inside.
The outside camera is traditionally the one used in photo-finish images. In the women’s 100, the outside camera was inconclusive for determining third place due to athletes’ arms blocking a clear view of their torsos. Torso position is used to determine finishes and times.