I understand the raw setting alone but it's not clear to me exactly what's happening with mRaw and sRaw. As a future 7d owner I have the following questions:
1) What do people usually shoot? Raw, mRaw, or sRaw
2) When you shoot m or s, what is actually happening in the camera. Some folks seem to allude to the idea that if you don't like the 18mp of the 7d then just shoot in mRaw or sRaw. I've also seen the term "pixel binning" around. I don't understand
3) How do you decide when to shoot raw at all or do you always shoot raw.
Obviously shooting raw affords the most flexibility but it comes at the cost of space on your memory card. Any and all help is appreciated.