First off (and most importantly) I am a POOR college student. I'm thinking about adding a lense or two to my case. My question is, is there a major difference between the brands? Obviously a cannon lense is the best option but what brand is nearly as good? What is a brand to stay away from? Also, and on a completely separate note, what does everyone think of extending tubes...you know, the kind that make a regular lense macro? And if you are pro-tube does it really matter what brand you buy as long as its compatable with your camera/lens? Thanks in advance for answering those two questions!
Justin