Will the AF work for Canon 100-400mm f4.5-5.6L IS + 1.4x II on Canon 7D?

Hi,

I just got my Canon 100-400mm F4.5-5.6L IS two days ago, and wondering if the Autofocus work with the 7D? How about adding the 1.4x II? Do I need to do extra any settings? I normally take with P only.

Please help. Thanks

Rito

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