My friend and fellow photographer William Porter in Dallas recently wrote a great post about shutter speed and motion. In my classes I teach beginners about "freezing motion" with shutter speed and how blur can actually be beneficial in some cases. William does a great job of explaining just how many different things you can achieve by using the right shutter speed to convey motion. It's worth a read (
http://blog.william-porter.net/2010/08/18/horses-in-motion/)
Image copyright William Porter
