So in a recent post there has been much talk about proper use of super wide/fisheye lenses, when the OP's questions weren't really about that. So rather than hijack that thread, I thought I'd start a new one that is specific to super wide/fisheye lenses. What are the types of situations that you usually use a superwide/fisheye lens for? Why do you use the lens for those situations? In your response if you'd mention the actual lens specs you use that would be helpful too because it seems to really range as to what one calls a fisheye lens or not, and how one might use it in a situation could differ a great deal based on the specs of the lens.