although this applies not only to 17-40, that is, for example, everything is sharp on the left, it can occur as a result of a blow, but, believe me, mark II (mostly landscapes) can be viewed here photo_page=1 and a little later in my LiveJournal: Com/ As a result, this is already my third 17-40 in a row, that is, I sold it, buying other lenses for trial, / 2.8, but I did not find any difference except for the price, weight and filter diameter of 82 do not get carried away with studying graphs, tests, etc. , but take more photos, in which 17-40 is definitely a good helper!