Tamron has released firmware version 2.0 for its 28-75mm Di III RXD, addressing previously acknowledged autofocus issues.
The update specifically addresses focusing issues on Sony E-mount cameras while shooting video, including 'autofocusing operation and loss of focus,' while also addressing 'flicker on peripheral parts of the image when zooming.'
See our Tamron 28-75mm sample gallery
The firmware update is done through the Sony cameras themselves, with the lens mounted. We'll be updating our review sample, so keep an eye out on our homepage for a full review in the coming weeks.
Press release
Notice about Firmware Update for Tamron 28-75mm F/2.8 Di III RXD (Model A036)

Dear users and potential purchasers of Tamron interchangeable lenses.
Thank you for using Tamron products.
We are pleased to inform you that the firmware update for the 28-75mm F/2.8 Di III RXD (Model A036) for Sony E-mount, full-frame mirrorless cameras, is now available. The firmware update is available through Sony E-mount camera bodies.
Please review the information below.
Affected model
28-75mm F/2.8 Di III RXD (Model A036)
Firmware version
Ver.2
Improvements
This update improves known issues for autofocus with Sony E-mount mirrorless cameras, when the range of focus search distance is broad, in video recording mode.
Tap for more details.
How to Update
The lens firmware can be updated using cameras that support this lens firmware update.
Tap for more details.
How to Check your Lens Firmware Version
From your camera’s menu screen, please select "Setup" then "Display version."
Inquiries regarding this matter
Please contact your local Tamron distributor.
http://www.tamron.com/en/#distributors



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