When using a high-speed camera as a recording device to measure the displacement or position of an object, the problem of parallax must be properly accounted for, or significant errors in measured positions can occur. In this paper, an experiment to measure the elastic properties of several golf balls of varying construction is described. The goal of the experiment was to verify whether a correlation exists between a ball’s coefficient-of-restitution (COR) and the frequency of its lowest structural vibration mode. Balls were dropped from a height onto a rigid surface and the COR was obtained by taking the ratio of speeds just before and just after impact with the rigid surface. Balls were dropped and bounced in front of a scale with fine graduation markings. Video recorded with a high-speed camera was processed using tracking software to measure the ball’s position and velocity as a function of time. However, parallax due to the camera field of view introduced significant error into measurement of positio...