[Esel Mann]

Slave flash won't cut it. Or I wouldn't depend upon it. You can certainly feel free to do so though! It is relatively easy for "the collectors" to counter.

First, it's not a photo in the sense of old skool photography. It's either a video, where by they extract a frame or multiple frames. If it isn't video, it's single frames but rapid multiples are taken over a certain time period. Think of it as more than photo but not quite video.

Second, a flash by nature is brief. It doesn't help if their capture window is longer than your flash window. Not to mention if such were not true, it would be necessary to align and time your flash the instant they take theirs. Well if for some reason they choose not to flash, how you going to know when to counterflash?

Third, being a solid state camera, they can have automatic light intensity compensation. That is to say they can filter out moments of brief intensity.

Fourth, being a camera one would have to cover all the cases. That is to say if you flash visible and the camera operates in the infrared, no dice.