There have been some reports that Tamron is still evaluating and researching the possibility of developing mirrorless lenses for Nikon Z-mount.
I received a tip that Tamron will indeed make mirrorless lenses for Nikon Z mount. The company is planning to release its entire line of full-frame mirrorless lenses for Nikon Z mount. The COVID-19 has significantly impacted their release schedule.
The last we heard from Sigma is that they have not decided yet if they will make mirrorless lenses for Nikon Z-mount.
