Exposure Lock (AE-L Button) is the abbreviation stands for Automatic Exposure Lock. It is useful using automatic and semi-automatic shooting modes. Where has this information been all my photographing life? So freaking helpful it's not even funny.
CALIBRATE CAMERS LENS - One of the most popular questions I receive from other photographers is, "Why are my images blurry?" Out of all the questions I get, this one is the most troubling, because 9 out of 10 times, it's the same reason.
The Best DSLR Canon Camera and Lenses for Beginners. This is a wonderful easy to understand breakdown. I wholeheartedly agree with Nicole get a nifty 50 you won't be sorry! (Cheese Making For Beginners)