I acquired a fish-eye lens maybe a year or so ago and never really got to put it to much use so when I went to Chicago I kind of went a bit nuts with it as the city was the perfect environment to test the lens it. It had large vertical skyscrapers and long horizontal planes that really allowed me to test and kind of abuse the unique features of the lens. I included a single non-fish eye photo (the boats/bridge photo) so you can see the differences between photos taken with the two different kinds of lenses.