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07-09-2010, 02:54 PM   #1
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K10d Focus Issues w/ Sigma 120-400mm HSM

Hi all,
I have a Sigma 120 - 400mm HSM lens (a recent purchase) that appears to have a back focus issue.

I have read on the other Pentax forum about this "There is an old thread on PentaxForums about the correlation between serial number and AF issues and the earlier ones presented with more problems apparently."

Has anybody experienced problems with this Sigma lens, also can somebody give me a link to the quoted thread.

Many thanks.

07-10-2010, 03:13 AM   #2
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I believe that thread is located here:*-16-5...-database.html If there are others, they will likely show up in the similar threads box below the thread.

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