I know some photographers don't like those "silly circular" fisheye lenses. I don't use mine every much but it can produce some unusual results. This is the old crepe myrtle in my side yard at dusk. I used the camera's pop-up flash to light the tree and of course it falls off rapidly towards the edges of the extreme wide angle producing an even more pronounced circular framing. Canon Rebel XTi (400D), 1/60 sec @ f/5.0, ISO 400, 8mm focal length.