What is a Histogram, why do I need it?

200712we_histogram1-thumb.jpgOver the last couple weeks I’ve been taking more photos and really immersing myself into the whole thing. It’s an area (DSLR) where I know very little, which is completely unacceptable from a geek’s perspective. I’m still reading and digesting this handy how to guide on histograms so I thought others could read along with me and the more advanced photogs in the crowd could drop in their thoughts in comments for us n00bs.

How To Read and Understand a Histogram [PB]