Tim Grey has been one of my favorite sources of digital photography information for a long time. I recommend him highly. He is my digital photography guru and I asked him a lot of questions when I was a digital photography newbie. I am still learning from him. He was traveling across the country and we met for lunch in German Village (just south of Columbus) to chat in person.
He has written 18 books (several are in my photo library) and hundreds of articles for photography magazines. His digital photography magazine, Pixology, is sent out digitally on a monthly basis and costs $20 per year. See the first link below.
People write to him and ask questions. He sends out a Monday through Friday email (“Ask Tim Grey”) with answers to the questions he is asked. It is free. You can sign up at the second link below. Scroll down to see the sign up box on the right.
He has a wealth of digital photography information available on a purchase basis at the third link below.
Links