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04-14-2019, 11:46 AM   #1
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Join Date: Mar 2011
Location: Ontario
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Sigma UC-II 70-210 AF issue

Hi all,

I have a Sigma 70-210 UC-II lens that has an odd 'Feature'. I know the lens is not very good and this exercise is more for information than trying to get real use out of it.

So, here is the issue. On my K-3 II it focuses just fine. Quick and snappy. No issue. However, on every other AF body I have (K-3, K-7, K10D, *istD, Z-1P, PZ-1, PZ-20) it will not focus. Not that it hunts around, or that focus is not accurate, it won't even attempt to focus. Like it was a manual focus lens. Just dead. Not even a little bzzzt from the AF motor. Nada.


Anyone have any idea what the problem could be?

19 Hours Ago   #2
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Join Date: Mar 2011
Location: Ontario
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Posts: 59
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No clues, eh?

Interesting thing is that when attached to other AF bodies, they do not get the proper lens information. None of it. It is a though none of the contacts were connecting. However, that's not the case. Really odd.
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