Just got it the other day and not had any good weather to give it a good try outside so I just went and give it a go today very cloudy and cold but could waite no longer
,from the few shots taken I find the lens superb it is very sharp even at f2,focus speed is also lightning fast but not quite as fast as my 300f2.8 but not a lot in it.It makes my 70-200Lis seem slow
Here is a few shots with 100% crops.








