A new Tamron 17-28mm f/2.8 Di III VXD G2 lens is rumored to be announced by the end of the year (will replace the current Tamron 17-28mm f/2.8 Di III RXD lens):
Tamron 17-28mm Di III VXD G2 Sony E-mount version released within this year] Get the latest news, Tamron 17-28mm Di III VXD G2 Sony FE-mount lens or release within this year, the new head will use VXD linear motor, with faster autofocus Speed and higher focusing accuracy are expected to be available at the end of the year (there were also rumors that it was in June).
Via SonyAddict