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Title: Very Sharp Lens
Review: At first when I got the lens and started to useit, I thought all the reviews I had seen before buying it were all lies. But after learning how to use the lens, the fact is that it's a gem. I have taken a lot of pictures of birds with it and almost all of then handheld with a Canon Digital Rebel XT, it renders great sharpness. The thing is, you have to take pictures with shutter speed of at least 640. Sometimes you can get by with less and it seems to be at it's best at 5.6 aperture.
