[natep]

The rolling shutter cameras will exaggerate the deflection on film. It's also true that turning the camera upside down will only serve to reverse the direction of the distortion in the opposite direction. However, the scientists and physicists that are observing and measuring this are not relying upon these cameras to make their calculations. Every research dept. of every shaft and club manufacturer confirms this deflection to be happening, as well as many independent researchers such as MacKenzie. The physics of this is pretty fascinating IMO, and there is substantial evidence that the clubhead, for all intents and purposes, is basically "detached" from the shaft throughout the impact interval and is essentially acting as a free moving object independently of the shaft. Pretty amazing how we can even hit straight shots with our various clubs and shafts, all behaving differently than each other. Check out this video at 33 seconds, and you can see how the rolling shutter creates an illusion in Tiger's swing.