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<blockquote data-quote="DTigga" data-source="post: 99395" data-attributes="member: 12060">Hope someone could help me. I have a work camera (d800) which has hardly seen much action.&nbsp; About a month ago, I borrowed it and used it with my af-s 50mm f1.4.&nbsp; After about a day I found the auto focus had stopped working.&nbsp; I tried everything to get it working, even tried it on my own d5100 but it still did not work. A week ago i borrowed the d800 again, along with their Sigma 70-200 f2.8. I have used this a few times together and it has always worked flawlessly.&nbsp; This time, after two days of shooting (around 400 shots), the af stopped working. I tried resetting the camera back to defaults to no avail. Now I am wondering if there is something I am doing to cause these failures. I have the camera body switch set to af and the lens to Auto. Is this the correct setting for lenses with the af built in?Any help is appreciated. Dave T</blockquote>

[QUOTE="DTigga, post: 99395, member: 12060"] Hope someone could help me. I have a work camera (d800) which has hardly seen much action. About a month ago, I borrowed it and used it with my af-s 50mm f1.4. After about a day I found the auto focus had stopped working. I tried everything to get it working, even tried it on my own d5100 but it still did not work. A week ago i borrowed the d800 again, along with their Sigma 70-200 f2.8. I have used this a few times together and it has always worked flawlessly. This time, after two days of shooting (around 400 shots), the af stopped working. I tried resetting the camera back to defaults to no avail. Now I am wondering if there is something I am doing to cause these failures. I have the camera body switch set to af and the lens to Auto. Is this the correct setting for lenses with the af built in? Any help is appreciated. Dave T [/QUOTE]

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