Tamron has just posted a teaser about a new lens on April 22nd. According to Nokishita, this lens is Tamron 150-500mm f/5-6.7 Di III VC VXD lens for Sony E-mount. You can take a look at leaked images and specs below:
Lens configuration: 25 elements in 16 groups
A minimum shooting distance of 0.6m (wide angle) /1.8m (telephoto)
A maximum shooting magnification of 1: 3.1 (wide angle) / 1: 3.7 (telephoto)
Nokishita has leaked the first images of upcoming Sony FE 24mm f/2.8 G lens, FE 40mm f/2.5 G lens, FE 50mm f/2.5 G lens. All these three lenses will be officially announced on March 23rd. Stay tuned for more info.
According to Nokishita, Tamron will soon announce a new 17-70mm f/2.8 Di III-A VC RXD lens for Sony APS-C E-mount cameras. You can take a look at leaked images of Tamron 17-70mm f/2.8 Di III-A VC RXD Lens: