I grabbed this quick shot with my cell phone camera (Samsung Focus) during some unexpected fireworks.
For best possible firework photographs remember the following:
1. tripod – very important
2. ISO 100-400. Fireworks are brighter than you think
3. F stop 5.6 to 8.0
4. Exposure. That’s where the fun and creativity come to play. You can do long exposures (as long as you’re on a tripod!!) or even multiple exposures
Enjoy and be safe!