I’m not even sure it would show up on film either. But for CCD cameras (aka phone cameras and basically all modern cameras), 350 americium buttons buttons from a smoke detector in a wide “stew” that far away would produce nowhere near enough ionizing radiation to do that. On top of it, americium-241 is an alpha emitter, meaning that even if alpha particles reached the lens, the lens itself would block a good amount an alpha. This video gives a demo of a CCD without protection over it with americium and other various emitters :)

https://m.youtube.com/watch?v=jFNvYA7731o

I don’t know about Microsoft, but intel seems to be on their game :3

https://xcancel.com/msiUSA/status/1654182993370533899

Oh I know, I just have a few hundred grams of it since I like collecting elements, so I recast it into something funny when I’m bored

Opening phones and heating burritos :)

And melting gallium when I 3D print moulds to make some silly metal objects (probably not so smart next to so much aluminium extrusion)