I must agree with joule128 that cameras can capture things outside of out visual perception. for example an ultra low lux camera (>=0.1u) is used in picking up infrared for night vision, and their are also cameras designed to be more sensitive to the opposite end of the visual spectrum, ultraviolet.
Also, the denser spiritual energy is the easier it is to perceive physically, so by creating a psi-ball (or dense ball of energy) you are in turn making it easier to be seen, by cameras, and even possibly the naked eye!! Keep up the practice! =D