Tamron have announced that they are going to issue a firmware update for the new 28-75 mm f/2.8 Di III RXD lens to fix an auto-focus issue that occurs when recording movies. The Tamron 28-75 mm f/2.8 Di III RXD for Sony cameras has proved to be very popular, already being on back-order with most retailers.

Tamron Press Release (Google Translation)

Notice regarding use of 28-75 mm F / 2.8 Di III RXD (Model A 036)

Thank you very much for your continued patronage of Tamron products.

In combination with our lens 28-75 mm F / 2.8 Di III RXD (Model A 036) which was released on May 24, and Sony mirrorless camera, "When focusing on movies, We confirmed the phenomenon that AF does not operate properly under circumstances ".

We are investigating now and plan to respond by updating firmware. 
Firmware update can be executed from a Sony mirrorless camera compatible with firmware upgrade. For details, we will show you on the "support information" page at a later date.

In addition, if you register for Tamron Lens Life Members and you are requesting e-mail newsletters, we will inform you by email magazine as soon as details are known.

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