Camera shake can ruin your photos, particularly at telephoto or in low light. Tamron's state-of-the-art Vibration Compensation mechanism incorporated into the award-winning 28-300mm zoom gives you blur-free hand-held images for incredible results! Finally, the technology you need in the lens you want!
I own one of these and love it. However, the focus is very slow (incredibly slow) with my 50 D, but on 20 D it works just fine. I'd be lost without it.