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<blockquote data-quote="pforsell" data-source="post: 671875" data-attributes="member: 7240">No camera setting can cause that behavior and more importantly, if other lenses work normally it is not camera malfunction. So I believe we can be 100% sure the culprit is the lens. That kind of AF performance rises many questions about the accuracy, reliability and repeatability of the focusing, so I would not use it even with continuous AF.Give them the benefit of the doubt and send it back again ASAP. If it cannot be fixed, my suggestions are: 1) get rid of it or 2) use it as a manual focus lens. Just for the heck of it, I googled &quot;tamron autofocus problem&quot; and got 502,000 results. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick out tongue&nbsp; &nbsp; :p" loading="lazy" data-shortname=":p" /> Sorry I cannot help more, I have never seen autofocus like that and never seen a Tamron lens in real life.</blockquote>

[QUOTE="pforsell, post: 671875, member: 7240"] No camera setting can cause that behavior and more importantly, if other lenses work normally it is not camera malfunction. So I believe we can be 100% sure the culprit is the lens. That kind of AF performance rises many questions about the accuracy, reliability and repeatability of the focusing, so I would not use it even with continuous AF. Give them the benefit of the doubt and send it back again ASAP. If it cannot be fixed, my [B]suggestions[/B] are: 1) get rid of it or 2) use it as a manual focus lens. Just for the heck of it, I googled "tamron autofocus problem" and got 502,000 results. :p Sorry I cannot help more, I have never seen autofocus like that and never seen a Tamron lens in real life. [/QUOTE]

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