I love using the fisheye for fireworks after shooting Illuminations with it! I still haven't quite gotten the focus down (infinity didn't seem to work perfectly with the fireworks), but finally being able to get a high aperture really made a difference. With the kit lens, even on Manual I can't make adjustments to my aperture when its in Bulb for some reason, its stuck at around f/5.6. Tonight with f/22 I finally got good color in the third act, which was really nice to see instead of the usually more washed out colors with a longer exposure time.