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Title: After my 3rd copy I'm still not happy
Review: I borrowed a friends 17-40 and fell in love. Great color and wonderfully sharp. So I bought one for myself. It was no where near as sharp, it went back, the second was even worse, so blurry my landscapes looked like they were taken with a P&S, even on a tripod at f/11. This third lens is about the same as the second but won't focus right. Sadly I don't think I'll ever get a good copy of this lens.
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