Honestly before getting myself the 1st L lense of my life, i am in a dilemma in choosing which one of the 4 units 70-200mm is the best... i keep searching every forums, website reviews and found that people are complaining about being soft when shooting wide open (F2.8).
So i decided to try it out myself and found that this LENSE rocks ! at F2.8 it still shines but after i try to shoot at F4, IT EVEN SHOCKS ME MORE !!! at F4, the sharpness of the IQ is very very significant...
I know the F4 version cost $500 less and ligher in weight, but now im happy !
COST & WEIGHT was the main concern but now after shooting more images i love my lense even more !