All photographers new or seasoned know Ken. He has this blog that gives you all the technical details you should know about photography and he also gives good reviews about his gear. Just recently a video of him was posted in Silberstudio.tv showing his work taken after Mt. Pinatubo erupted in the early 90's.
Click more for video link.
He talks about the Pinatubian light and how he used it to take his winning photograph.
Click link here
