Autofocus issues with Tamron's new 28-75mm F2. 8 for E-mount have been reported by some users, and the company has issued an official acknowledgement of the problems. While there's no fix just yet, Tamron says it is 'evaluating the cause of the error' and researching a solution.
The company says it will issue a firmware update, which thanks to the open nature of Sony's E-Mount standard, users will be able to apply the new firmware directly through the camera.
The issue specifically manifests itself as a complete autofocus freeze or fail, and though Tamron states that it primarily occurs in video shooting, users have reported issues in stills shooting as well. It's worth noting that in our experience with the lens so far, we have not noticed any focus problems to the degree we've seen from users on YouTube.
View our Tamron FE 28-75mm F2. 8
We did have a handful of images that were slightly front-focused throughout the course of shooting our sample gallery, but nothing terribly out of the ordinary or resembling a complete focus fail that required restarting the camera or removing and re-mounting the lens.
Notice about 28-75mm F/2. 8 Di III RXD (Model A036) Operation
Dear Tamron product users and potential purchasers.
Thank you for your interest in Tamron products.
We would like to announce that we discovered some issues with the auto focus of our new lens, 28-75mm F/2. 8 Di III RXD (Model A036) for Sony E-mount, 35mm full-frame mirrorless cameras, released on May 24, 2018. The issues occur primarily when using the camera in video recording mode.
Rest assured, we are evaluating the cause of the error and for the solution to this matter. We expect this issue to be resolved very shortly and we will release a firmware update at that time.
Regarding the firmware updating process, please be assured that the process is accomplished directly through the Sony camera and supported by the Sony firmware updating function. As soon as the process is finalized, we will explain the process in detail on our website.
We sincerely apologize to all users and potential purchasers for any inconvenience this issue may cause.