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crwdns2944351:0crwdnd2944351:0Nikon D3100 Lens Mounting Ring Reseating/Replacementcrwdnd2944351:0crwdne2944351:0

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crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Taylor

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crwdns2933801:0crwdne2933801:0
Introduction
If you can see black rings around the outside of the image preview, the lens may not be mounted correctly or the lens mounting ring has worn down and no longer holds the lens in position. If you have this problem use this guide to reseat or replace the lens mounting ring.