How to measure ball spin

[liowkc]

Besides using a video camera, what is the easiest way to measure your ball spin?

[kev3inp]

The easiest would be the CATS system. Let the machine do it for you. Or else, if you're really, really observant, you could put a piece of contrasting tape on your ball and attempt to count revs by eye, though I think to get all of them someone else would have to count for you.