Naruto, then 3 years old, came up and picked up one of his cameras and started looking at it. And he made the connection… By Mr. Slater’s own admission he made the connection between pushing the shutter release button and the change to his reflection in the lens when the aperture opened and closed.
As any working mage knows, the first thing that happens when you bring up a lot of power is that you have to figure out how you’re going to channel it. Now ideally, if you’re not an idiot, you figure that out before you bring the power up. Unfortunately this is Silicon Valley we’re talking about, so that’s really not on the table.