The combination of this lens and the 7D's 70-200mm f/2.8L USM is a great combination for me. After debating between the 24-105, the 15-85, and the 17-40, I finally went on the former because of his adaptability. After using the 15-85 for about two months, I realized that there is a price to pay for flexibility in a camera lens. This is not to say that the 15-85 is a bad lens; on the contrary, I just wasn't happy with the clarity when shooting at 15mm and an open aperture. If you're on the hunt for a lens in the $25,000 area but aren't sure which one to get, "she" (so to speak) is a universal 24-105mm f/4.5-5.6 "L"-ka.
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