Is this Lens good for D3100?

Nikon Nikkor 55-200mm Zoom Lens features VR Image Stabilization, f/4-5.6G, IF-ED, AF-S, DX
Is this lens compatible for the Nikon D3100?
pros cons for this camera?

It is.
In fact ANY AF-S Nikkor lens will work with your camera

Yes, it's compatible. All nikkor lenses fit nikon dslrs.
though, it'd be much similar to the kit lens you got with the camera, only it'll have extra zoom.i'd recommend buying a fixed lens (which are cheap than focal length/zoom lens) with a lower aperture (the f/) to shoot better photos in low light!
also - if you would be so kind as to vote for my video i made so i can win a scholarship to go to school to study photography? Please and thank you so much ^^ http://contest.joefoss.com/entry/20027

Yes that lens is totally compatible with your D3100.

It will work… Whether it's a good lens is a completely different kettle of fish…

Pretty decent lens too, especially if you consider the price
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