How to use the 3 Buttons on the front of the FE 70-200mm f/4G Lens

Started May 7, 2014 | Discussions thread
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brosenz Contributing Member • Posts: 978
How to use the 3 Buttons on the front of the FE 70-200mm f/4G Lens

Do you know what's the purpose of the 3 buttons and how to use them?, thanks

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