The Tamron AF 28-75mm F/2.8 Di III RXD is a new lens for Sony E mount cameras. Not only is it the first zoom lens for E mount from a third party manufacturer, it is also a completely new design exclusive for mirrorless full frame cameras.
The Sigma MC-11 adapter allows you to use Canon EF mount lenses on a Sony E mount camera, with autofocus capabilities! Officially, only the Sigma lenses are supported, but the adapter also works with most existing Canon EF lenses. You can get it for just 150$ when it is on sale, so it is quite aggressively priced compared to similar products such as the Metabones adapter.
I have composed a complete list of all lenses for Sony full frame E-mount cameras (A7 and A9 series). I’ve only included lenses that were designed for the shorter flange distance of E-mount (no adapted DSLR lenses). Also, I intentionally left out cine or other speciality lenses.