I am in the process fo switching to digital, and am starting with the 5D. I am wondering if there is a website or book, or any information on the settings? It has the basic portrait, & landscape already in the program, but I am unable to find how the numbers came about, or what are the differences in each setting. Basically, is there any place that I can look at pics taken with several different settings for the camera, or is this all going to be trial and error to get all the presets for sports, low and hi lighting, and all the other commom uses?