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Tamron 17-50 F2.8 Did I get a bad copy?

Posted May 22nd, 2008 by ovlov

This lens seems awfully soft for such a highly reviewed lens. I have only had it a few hours so it could be a learning curve thing though it doesn't seem like it should be this bad. It's sharpest at F8. At F2.8 it's soft and sometimes objects have a ghostly glow to them. In high contrast scenes it exhibits purple fringing at the edges.
100% crops of the center of the image. All shots are handheld.
F2.8
http://www.cramptonstation.com/tamron28.jpg
F4
http://www.cramptonstation.com/tamron4.jpg
F8
http://www.cramptonstation.com/tamron8.jpg