Image by SonyAlphaBlog
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.
SonyAlphaBlog posted their full review:
For most of its performance it is on par with the Sony 24-70 F2.8 GM except for AF accuracy (SAR note: Fix coming soon)
- Excellent sharpness globally on par with the Sony 24-70 F2.8 GM
- Cheap ! (900 euros)
- Quiet AF
- Very good flare resistance and very low CA
- Very short minimum focusing distance (19cm)
- Built in lens corrections
- Strong vignetting and distorsion but will be corrected with a Lightroom lens profile soon
- Build quality : quite good but feel a bit plastic
- unreliable AF in AFC
- only starts at 28mm
- Unable to shoot at 20fps on A9 (8-9 max)
- No AF/MF button
- No focus hold button (so practical to assign to eye AF)
And here are new Tamron lens video tests: