Annals of strange behavior

While walking around this afternoon I came across a man standing on a street corner taking pictures. His camera was a lot like my dad's old Pentax, so naturally I looked at it pretty closely while waiting for the light to change. It had what looked like, at first glance, a long telephoto lens. But it wasn't! I guess you could call it a periscope lens. The glass at the end was fake. Or, rather, it was real glass but it wasn't a lens. Instead, there was an opening near the end with an angled mirror peeking through it. He was pretending to take pictures of something across the street, but was actually taking pictures of the people who stood next to him while waiting for the light to change. Odd.