This is simply one hell of a fun lens! Does it serve a purpose? The original fisheye lenses were made for scientific research and pipeline construction inspection, hardly what I use it for. When I grab for the 16Fish, it’s because typicaly I have a scene that is so wide that I need the 180 degree coverage of the 16Fish to get the shot. At the same time, the scene in front of me must be one where there is no straight lines because the 16Fish will not render them straight. When you’re in the cockpit of a plane for example, you want the whole thing and some of the outside world, this is your only lens of choice. If you search the site, you’ll find a number of examples where I had fun shooting with the 16Fish.