The already leaked Tamron 70-180mm f/2.8 Di III VC VXD G2 lens for Sony E-mount was just officially announced and if you take a look at the press release, the last sentence says:
“This product is developed, manufactured, and sold under the license agreement with Nikon Corporation.”
A Tamron lens for Sony E-mount developed with Nikon?
Update: Tamron updated their press release and removed the sentence.
Now this could be a typo, or maybe it has to do with the fact that just a few months after Nikon announced the Nikkor Z 70-180mm f/2.8 mirrorless lens based on the existing Tamron design E-mount, Tamron introduced a new version II (G2). What do you think?
Right after Nikon announced the Nikkor Z 70-180mm f/2.8 lens based on the existing Tamron lens for E-mount, Tamron will announced new version II (G2) for Sony E-mount: https://t.co/EZ1z41XxJo
— Nikon Rumors (@nikonrumors) August 8, 2023