Sigma 17-50 OS owners! OS engage/disengage question. Please check yours

Started Nov 17, 2011 | Discussions thread
Gabebalazs
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Re: Sigma 17-50 OS owners! OS engage/disengage question. Please check yours
In reply to Withnail73, Nov 19, 2011

Great!!! Thanks for the official explanation.

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Canon EF-S 10-18mm f/4.5–5.6 IS STM
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