By the end of the month I consider to buy that lens. It will replace a ef100-300 f4.5-5.6 that I found to use nearly all the time at around 200mm anyway.


I was wondering if anyone who own that lens could give me some advice. Like what about the dof of f2.8 at 200mm, how thin is it? Does this lens suffer chromatic aberation on high luminous contrast on a apsc body ? (I have a 40d) Or do you have any general advice I should consider before investing that much money on a lens?


Also I'm aware of thoses 70-200 and that it lack IS, but I dont really care about that.


Thank you