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Canon EF 70-200mm f/4L IS USM

ef70-200lisusm
Review Date: May 24, 2007 Recommend? yes | Price paid: Not Indicated | Rating: 6 

 
Pros: Light weight. Very smooth zooming mechanism.
Cons:
Not nearly as crisp at closer distances - 10-20 ft. - as my 2.8 non IS

I'm testing my third copy of this lens. Compared to a very good 2.8 nonIS, the first was much softer at 200mm but slighly better from 70-135. The second was sharper at 200 but much softer at 70-135. The third copy seems to be about equal to the nonIS 2.8 at 200mm, slightly sharper at 70-135, but once you focus on something 10-20 feet away, the 2.8 lens is leaves this new lens in the dust, and not just in the center. If this is normal, then it's going back. So far, I'm only partially impressed, but I also ask a lot of the lenses I use and push them very far. For distance only subject, I'd say that this lens is very, very good. Canon still needs to work on its quality control. As far as I can tell, it's an absolute crapshoot to get a good one of these lenses.