Well, today was the first day that I experimented with my Canon 70-200 f/4 lens. 95% of my photos were blurred. Is this due to the lack of IS? I am not sure what to do now, I ordered from Adorama.com which allows a 14day return policy. I am contemplating returning the lens and purchasing a different lens. Perhaps a standard zoom rather than telephoto. Does anybody have suggestions? My price limit is about $650.00, I am rather disappointed in the outcome of this, I would really appreciate any suggestions. At this point, I am planning on returning the lens. If The cost of a new lens is not as much as the 70-200 I have right now, I may also buy a 50mm 1.8 or something similar. I am leaving for vacation in about 3 weeks, so I really need to find and research a lens quickly.