Some additional information on the upcoming Tamron 35-150mm f/2-2.8 Di III VXD lens (Model A058) from SonyAddict:
"The Tamron 35-150mm f/2-2.8 Di III VXD has a very fast and interesting variable aperture design that we will hopefully see more of in the future. From 35mm up to 40mm the lens is an f/2, but when you reach 40-60mm it is f/2.2 and by 60-80mm f/2.5 and finally 80-150mm f/2.8."
Previous coverage of the lens can be found here:
New pictures of the Tamron 35-150mm F/2-2.8 Di III VXD lens (Model A058)
The upcoming Tamron 35-150mm f/2-2.8 Di III VXD lens is huge