D200 & Sigma 120-300mm f/2.8
I purchased a Sigma 120-300mm, f/2.8 lens in June of 2008. The auto-focus motor has been replaced six times since then (18 months). Generally it lasts less than ten minutes of focusing, but it does work when I receive it back for a little while.
Under warranty, Sigma has replaced the lens once and the auto-focus motor the other times. This has been done with no questions asked, but no explanation given.
I have two Nikon D200 bodies that I have used this lens on, both giving the same results. My other Nikon & Sigma lenses work great on both bodies.
When I sent the lens back yesterday, I included one of these bodies, as requested by Sigma’s general Manager, Mark Amirhamzeh.
What experiences have other photographers had with this lens or lens/D200 combination? Does anyone have any explanation or suggestion?
Thank you, Dick