Here's two more, and some setup info: 580 flash on a light stand, 100mm macro on a 5DII/tripod. I just put some water in a baggie and stuck a tiny hole in one corner with a sewing needle, and clamped it to a boomed microphone stand, and let it drip into a small cut glass serving dish. I tried different colored sheets of construction paper underneath the dish. Wish I had taken a picture of the setup. Maybe I'll remember to next time.