I use it with a7 III, all the latest firmware. In 4k shooting, autofocus on the face does not work ONLY IN VIDEO, everything works in the photo. In order not to dust, buy a protective filter, I have no dust for a month of use. There was first a tamron, then a jimaster, and now a sigma, a tamron is complete despondency in the picture . The picture is excellent, after the jimaster, you understand how outdated it is already.
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