I am looking for information about flashes. I am trying to learn what I need to know about them and how to properly use them. I am looking for just relatively basic flashes. Not the big expensive studio flashes, just something along the lines of Nikon's speedlights. I'm not expecting anyone to break it down for me (if you want to I would be more than happy to read it) I am just mainly looking for someone that has some good sites or articles on the basics. Thanks.