Summary: Canon's update to its professional fast telezoom may look much the same on the outside, but internally it's been updated to give image quality that's quite simply the best in its class. Effective autofocus and image stabilization systems, plus full weather sealing, round off a compelling package.
Pros: Exceptional image quality, Superb build quality, including dust- and water-sealing, Highly effective image stabilization, Excellent autofocus and manual override
Cons: Relatively harsh rendition of out-of-focus areas of the image, Somewhat susceptible to flare with direct light sources in or close to the frame, Inconvenient design of tripod mount ring (can't be detached without taking lens off camera)
Summary: Overall this is a great lens but there's no escaping the fact that it's also a costly one. If you are a demanding Canon user for whom price is not the decisive factor then this is a lens that you'll want to own.
Excerpt: Actually, I have many favorite lenses, but overall, the 70-200 f/2.8 II is now my most-favorite - a status the predecessor to this lens, the Canon EF 70-200mm f/2.8L IS USM Lens (version 1) held prior to this review. I was happy with the original 70-200 f/2.8L IS, but a new version of a lens usually brings improvements of significance - otherwise, it would not be developed in the first place.