a7III/a7RIII AF buzzing and Samyang firmware?

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Jacques Cornell
Jacques Cornell Forum Pro • Posts: 14,159
a7III/a7RIII AF buzzing and Samyang firmware?

I've just bought Samyang 35/1.4 and 85/1.4 lenses, and on my a7RIII with Sony firmware 3.01 and the latest Samyang firmware, the AF buzzes constantly, and rather audibly, while I'm half-pressing the shutter button. Is this normal? Is it reduced/eliminated by newer firmware in the camera?

I had a Samyang 35/1.4 about a year ago and sold it (doh!), and I don't remember it buzzing like this. It had an earlier version of Samyang's firmware, and the a7RIII was on firmware 3.01, as it is now.

I have read, in Dustin Abbot's reviews, that these lenses' AF doesn't seem to "settle", but I'm surprised that the constant focus tweaking is so audible. I hesitate to update my camera's firmware, as reports indicate it'll make my 3rd-party batteries unusable. But, if it improves the AF, I'll go ahead and buy new batteries.

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