I think there is a loop hole in some states with traffic cams. It's something to do with your right to confront your accuser and your not able to confront your accuser when it's a camera. You could always speak to a lawyer but it's probably just easier to pay the ticket.
No don't pay it. If it was in the city of L.A. They are not collecting red light camera tickets. Nothing will happen. The city decided to not renew the contract with the camera company because the vast majority of people learned that they didn't have to pay. Save your money.