Does anyone know anything about fish-eye lenses and producing panoramic images from them? I am looking into buying one after never really bothering with them before. I'd like to experiment with doing 360 degree panoramas as well as just very wide photos. There seems to be quite a range to choose from so I was wondering what the pros and cons are. I would probably use a Canon EF mount and assume the distortions and aberrations are lower with a full frame camera as the lens doesn't need to be quite so extreme?