New Sigma 17-50 2.8 OS on D5100 problem

Started Sep 28, 2012 | Discussions thread
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New Sigma 17-50 2.8 OS on D5100 problem
Sep 28, 2012

I purchased Sigma 17-50 2.8 OS HSM lens yesterday for my D5100. When trying to auto-focus , what lens does is hunt, hunt and hunt even in daylight. When it eventually settles, the picture is totally blurry.

When I purchased this lens, the salesman was telling me that he was not sure that this lens will auto-focus on D5100. I had made a good search on internet before getting this lens. I told him it will auto-focus because it has an ultrasonic motor in it.

Has anybody here has experienced compatibility problem with this lens on D5100 or is my unit malfunctioning?
A prompt help will be appreciated because I want to return the lens.

 dockil's gear list:dockil's gear list
Fujifilm XF1 Nikon D600 Nikon AF-S Nikkor 16-35mm F4G ED VR Nikon AF Nikkor 50mm f/1.4D Nikon AF-S Nikkor 70-300mm f/4.5-5.6G VR +4 more
Nikon D5100
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