http://www.nikonchat.com/af-s-nikkor-18-55mm-2/
My camera lens is locked when you see it?
I have an AF-S Nikkor 18-55mm. And every time you adjust the zoom, the lens is very tight, as is difficult to turn. What I can do to relax? Do not leave it all lol. I bought it and it was so.
Achillies brings a good point if you set A in the barrel of the lens (and not a goal with an A / Marco M) then the focus ring would be very difficult to turn and, in fact, do not force your time. The zoom ring, but should move freely
Nikon D3100 14.2MP Digital SLR Camera with 18-55mm f/3.5-5.6 AF-S DX VR Nikkor Zoom Lens
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