According to latest face detect and eye AF review of new Tamron 28-75mm f/2.8 Di III RXD lens by David Oastler, it seems that this lens has very good performance, Autofocus speed, face detect and eye AF is as fast as native Sony FE lenses. This lens is one of the best selling lenses, you can pre-order at B&H Photo Video & Adorama & Focus Camera. And Tamron Japan already announced that this lens is in short supply.