Nikon D5200 autofocus? - 1

I just purchased a Nikon D5200 and I also ordered and external microphone (shotgun mic), If i use the shotgun mic while recording video will that get rid of the noise that the autofocus makes? I have not used either yet but what I have heard was that when shooting video and using the built in mic on the camera you can hear the camera lens autofocusing.

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Nikon d7000 Auto Focus Problems?!

Just got a brand new Nikon d7000 less than a week ago and today all of a sudden out of the blue the AutoFocus does not work. Won't focus and if you try and press the shutter it won't take pics either. Manual focus works fine. What is going on? Any suggestions on what might have happened?!

I'm using the Nikon d7000 with the 18-105mm VR lens. Both the auto focus button on the camera and on the lens are clicked to auto focus but it won't work. If I switch the buttons to manual it works fine. Brand new camera… Any help would be appreciated! Thanks

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