Fireworks are beautiful and a lot of fun. A tripod is a must since you will want to keep your shutter open about 2 seconds to capture the full bloom. Set up your camera aimed at the fireworks and start out with a shutter speed of 2 seconds at f8 ISO 200. If you want to keep your shutter open longer to capture more fireworks going off in succession, you can raise your aperture up to f11 or higher to make a smaller hole for the light to come in. Play around and try it out. Happy Snapping!