In anticipation of the upcoming 5d Mark iii/X vs 6d, what are people's thoughts about the best general-purpose lens? How much zoom is too much? Is 18-150 reasonable?
I've been in a Nikon to date, but am thinking of switching if the specs on the Mark III are to be believed (and the price point is accurate). That said, I don't know a lot about Canon's lenses. Are there must-have features (image stability, etc) that I should look for?