Tokina will officially announce a new Opera 16-28mm f/2.8 FF full-frame DSLR lens for Nikon F and Canon EF mounts on February 22nd. This lens was initially displayed at the 2018 Photokina show.
This will be the second Opera DSLR lens for Tokina after the 50mm f/1.4 FF.
Update #1 - The expected release date is March 15, 2019. The Japanese price is ¥94,500 including tax.
Update #2 - some additional info from a Japanese store listing (Google translation):
Newly developed large-diameter 56mm P - MO Aspheric lens
Improvement in surface accuracy reduces ghosts and flares
Equipped with SDM (Silent Drive Module)
The DC motor is sealed for quiet operation
The GMR sensor (high precision magnetic sensor) is mounted in the immediate vicinity of the drive section
It realizes quick AF speed by focus control with higher resolution and higher detection accuracy
"One-touch focus clutch" with manual focus feeling