I didn't ask if this will work good for me. I am capable of making decisions like that on my own. I asked for solid feedback on what people thought about this lens. Example is it sharp, is CA bad/good, is Vignetting bad/good stuff like that. If I said hey guys do you think a 12-24mm will work good for shooting landscapes? then maybe but the simple fact is that focal length has no effect on what I asked and even if It did 12mm is the widest non fish eye you can get for canon so unless I asked will this lens be good for shooting birds or sports camera body factor's in 0% to my question