i went to to a bit of reading about this topic. apparently those cameras that claim to take a person's aura is actually fake because they consist of LED's inside to expose the film or sensor so that it will look like the person is glowing. on the other hand, real aura that exists around a person cannot be recorded fully at this time due to safety limits on the intensity of electromagnetic pulse applied to the person to view the aura.
look here for information on machines that can detect the aura this way. you'll be put off by the price