Tamron issued a firmware update for the 35-150mm FE lens: tamron.com/global/consumer/support/download/firmware/a058/sony_e/. Here are the benefits:
- Improved AF performance during zooming
- With α9 III, when its focus mode is set to AF-S, DMF, or MF, it will support continuous shooting at up to approximately 120 frames per second
* Update can be done with TAMRON Lens Utility™.
But as noticed by PetaPixel:
While yes, the Tamron 35-150mm f/2-2.8 is now able to shoot at 120 frames per second on the Sony a9 III, it can only do so in AF-S, DMF, or MF focus drive modes. The lens remains capped at the 15 fps rate when using AF-C, as is typical with third-party lenses used on Sony mirrorless cameras.