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Message: <blockquote data-quote="Horoscope Fish" data-source="post: 341094" data-attributes="member: 13090">The "err" message indicates the camera body is not properly communicating with the lens. Do you have another lens for this camera and if so does this error occur with all of them or just one in particular or what? The most common solution to this problem is to clean the electrical contacts on the camera body, and the lens itself, in hopes of restoring proper communication between the two. If this does not work and you have no other lens to try, I'd go to a brick and mortar camera shop and ask if you could try one of their lenses on your D7000 body to see if the error presents itself. If it does not show up, that would indicate you have a bad lens....</blockquote>