Camera and radar launch monitors essentially use opposite methods to provide data with a major difference being where the launch monitors are positioned. Radar-based systems are positioned behind the golfer and have no direct view of the club face whereas camera-based systems are positioned slightly in front (towards the target) of the golfer at address. Camera-based launch monitors will take multiple images of the golf ball and process launch information through a ball-flight model to show the flight that the launch conditions would have caused. Radar-based launch monitors use radar to track the flight of the golf ball and then calculate the launch conditions that would have caused that flight. To learn more about the differences click here