Nikon D5500 audio problems?

Total beginner here. I need to be able to make videos with my camera, but I can t figure out the audio. Every time I make a video, the sound ends up sounding muffled. Most of what is heard sounds like a running fan or something and what I m saying is barely heard in the background. Please help!

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Looking for good lens to take portraits pictures with the Nikon D 5100 camera?

Looking for good lens to take portraits pictures with the Nikon D 5100 camera?

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Can the battery grip for Nikon d3200 and d3100 fit the newer d3300?

I bought a battery grip online and it says that it is for the nikon d3100 and d3200. However i do have the nikon d3300. Will it fit? I mean will it fit snuggly?

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