My job at a university has been expanded from layout/design to photography, so I am still learning a good bit about the technical side of photography.
We have a Nikon D100 with with a Nikon 24-88mm, 3.5-4.5 lens and a Sigma 70-300 mm, 4-5.6 (I hope that's the right way to say it).
Here's my question: do I need to buy anything to get really high quality action shots and if I need to buy anything should I get a flash or a different lens?
Any help or suggestions would be greatly appreciated!