Nikon issues firmware updates for Df, D5200 and D3200

I was wondering the same.

Sigma and Nikon seem locked in an arms war, with Nikon’s camera firmware updates crippling Sigma lenses’ AF, and Sigma’s lens firmware updates undoing the sabotage.

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The Nikon updates have also blocked use of 3rd-party batteries. Pure hostility toward the end user.

I respect Nikon’s heritage and technical prowess, but their recent contempt for their own paying customers is despicable.

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