I appreciate your input in this matter. In the actual pictures that Patrick sent me, some corners were dark when shot wide open. I have been using my 70-200 for a long time on my D200 and D2x and am spoiled by it's perfection on these bodies. I anticipate that 95% of the time I won't be disappointed by the results on the D700. Besides, I have LOTS of other lenses to try out on the D700.