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Message: <blockquote data-quote="rocketman122" data-source="post: 465044" data-attributes="member: 14443">I admire sigma (and tamron) for stepping up and offering some killer gear that offers a true alternative to the overpriced nikon offerings. finally!!I think nikon quality has dropped and sigma has done the opposite. the nikon lenses have a cheap plastic build with plastic filter threads and boyonet mount. the hood feels cheap and the AF is slower than the D gen lenses. and sigmas is the opposite. it feels premium. build quality is there and af is lightning quick. the USB dock is a fantastic tool for fine tuning AF accuracy. im certain sigma are making a killing in sales from canon and nikon owners who dont want to dish out so much for fast primes. OTOH that $850 50 ART is way overpriced. we have a first in history of a sigma lens costing more than a nikon. $600- and not a cent more. I too am dying for them to release an 85 ART.</blockquote>