Image on top shows their 28-75mm f/2.8 FE lens. L-mount version coming in 2019?
In an interview posted by Dpreview Tamron confirmed a strong interest in making L-mount lenses:
I think we need to get those cameras into our engineers’ hands and analyze them and see what they’re all about and make determinations from there. I think that we’re keenly looking at all these different mounts and I think it’s an important part of the market today. I’m not involved in the talks over in Japan, but I would assume there is definitely a strong interest in these.