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<blockquote data-quote="BF Hammer" data-source="post: 829730" data-attributes="member: 48483">Lisa, was the lens bought used? If so and a previous owner also had the Sigma dock, I could believe pretty easily that the focus was customized for another camera body. Or at least attempted and done poorly. It is something that can be done with the software, but I never had a reason to try that. I do have the dock and I just used it to update firmware (Nikon version only has 1 update over the years) and I customized the switch functions a little. At 1 time I had 3 Sigma lenses to use the dock with.But this does not explain the aperture controls not working right. I have been reading through web searches related to this lens and the Z50, and I do not see anybody complain about your problems. They seem to indicate aperture control is normal. But that admittedly is not the Z50-II.So I would conclude that the lens is faulty if you do not have similar problems with other F-mount lenses. I do not know if you are using the original FTZ or the FTZ-II. There is a<a href="https://downloadcenter.nikonimglib.com/en/products/491/FTZ.html" target="_blank"> firmware update to apply for the FTZ (ver 1.1)</a> but the FTZ-II is unchanged to date.</blockquote>

[QUOTE="BF Hammer, post: 829730, member: 48483"] Lisa, was the lens bought used? If so and a previous owner also had the Sigma dock, I could believe pretty easily that the focus was customized for another camera body. Or at least attempted and done poorly. It is something that can be done with the software, but I never had a reason to try that. I do have the dock and I just used it to update firmware (Nikon version only has 1 update over the years) and I customized the switch functions a little. At 1 time I had 3 Sigma lenses to use the dock with. But this does not explain the aperture controls not working right. I have been reading through web searches related to this lens and the Z50, and I do not see anybody complain about your problems. They seem to indicate aperture control is normal. But that admittedly is not the Z50-II. So I would conclude that the lens is faulty if you do not have similar problems with other F-mount lenses. I do not know if you are using the original FTZ or the FTZ-II. There is a[URL='https://downloadcenter.nikonimglib.com/en/products/491/FTZ.html'] firmware update to apply for the FTZ (ver 1.1)[/URL] but the FTZ-II is unchanged to date. [/QUOTE]

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