questions about sigma lenses

Started Dec 12, 2012 | Questions thread
Deleted1929 Forum Pro • Posts: 13,050
Re: questions about sigma lenses

You might want to check more into that ultra-cheap 70-200 f2.8, as I suspect it must either be manual or defective.  Note that some old Sigma lenses require re-chipping to function on modern cameras, and that could be an issue here also.

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