Thanks to you all for the input on new lenses to purchase on my stated budget.


Since IS is a new feature and learning curve for me .... If I get a 70-200L lens for my outsideescapdes, hikes and sport events I would like to know the real world implicationsof purchasingthe 70-200 f/4 IS USM versus the 70-200 f/2.8 USM model.