this is one of those lenses that is worth every cent. Granted, the f4IS is sharper, has better IS, but it just doesn't have 2.8!! And the version 2 is really worth it!! here are a bunch of pics taken with version 1(already sold btw), and all taken at 2.8. It is a FANTASTIC lens, and don't let anybody ever tell you it isn't!! I have samples of version 2 if you want those, too. and Bryan's charts really don't lie, it is prime sharp pretty much across the board from 70-200, with 100 probably being the weakest(but by no means a slouch at all!!) of the range. Here you go....I apologize for the quality of some if they don't look too sharp...just a conversion anomaly!!!


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