This Lomography Ringflash attaches to the outside of your lens, and its four lighting elements each deliver a different color to your subject. You can use it as a single color ring flash, too, but its makers encourage you to get up close to your subject and flash a picture that has four different kinds of lighting in the same frame. Powered by two AA batteries, it fires via an external hot shoe or its own built-in slave trigger. Might be fun for some trippy looking effects. But that's not...