I've been messing about a bit this weekend with the Samsung A8 cell phone. I'm pretty happy with the results I'm getting - well a huge improvement on anything I've done using anything else before! This 2,335 year old tetradrachm from Babylon turned out to be quite photogenic. Ideal shooting distance for the obverse and reverse was about 6 inches. However, it took about twice that distance for the autofocus to stop misbehaving and give me a half-decent shot of the edge.
I once heard a coin dealer refer to those quarters painted with nail polish as a "hokewater". Or that's what I thought he called it. When I asked him what a hokewater was, he explained that in certain establishments frequented by *ahem* ladies of a certain profession, each "lady of the evening" would paint some quarters with her own personal color of nail polish, to use them in the juke box, and this way they could each be refunded their quarters later when the coin box was opened. I have no idea if any of that was true, and I was still mystified why he called them "hokewaters", until he told me to sound out the word. I eventually got it.
Those halos are awesome. Probably shouldnt have handled that quarter with bare fingers, though- it looks radioactive! Did you listen to it to be sure it wasn't emitting a faint humming sound?