I was trying to find a forum for discussions of lenses, but this is the closest I found. I found out today about something called LensBall, or maybe LensSphere. I am not at all recommending it, I don't have one, and only saw pictures of it, but it seemed interesting enough to discuss. It looks like an optical quality, or at least much better than ordinary, glass sphere. LensSphere™ Hand-Polished Photography Crystal Lens Reminds me of the story about the Leeuwenhoek microscopes. In the early days of microscopes, it was hard to make the small, short focal length, lenses needed. It turns out that a small glass sphere, at least for the time, made a fine lens. Leeuwenhoek would make and sell such spheres, with the suggestion that they were hard to make. It seems, though, that they are easy to make: Heat a glass rod in a flame until it softens, and pull into a fine thread. Then heat the end of the thread in a flame, and it will form a very nice small sphere. Anyway, it seems that there are some fun things that can be done photographing through larger spheres, as shown on the above web site. I don't know anything more that the web site, which seems to have found me though some list that I accidentally signed up for.