newbie ? on APO 70-200mm F2.8 EX DG OS HSM

Started Jul 27, 2014 | Discussions thread
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Bucky Allen Junior Member • Posts: 40
newbie ? on APO 70-200mm F2.8 EX DG OS HSM

With the OS system I understand the switch has 3 positions off-1-2, what does the 1 and 2 represent?  1 being less stabilization or more?

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