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Message: <blockquote data-quote="salukfan111" data-source="post: 506825" data-attributes="member: 39212">Not yet.  I've owned several Sigma and they weren't impressive in build quality or sharpness.  The stories about the aperture blades will keep me away from buying the art lens but I would shoot someone else's (I loan out and borrow lots of lens).  I sort of expect a lens should last 30 years and doubt they'll be many arts kicking around in 5 years.I am coming around on Tamron and looking forward to their new primes.  I have their 15-30mm which is awesome.  If I didn't have the Nikkor 70-300 VRG and 180 f/2.8, I'd be looking into that 70-200 tamron.</blockquote>