This amazing contraption allows you to attach Sony A-Mount lenses to your E-mount cameras like the Sony A7III above.
You can find Sony A-Mount lenses that are a fraction of the cost of a similar E-Mount lens.
It’s not a native E-mount lens, it’s actually a Sony A-Mount that I use on the A7III via the LA-EA4 mentioned above.
This is a huge lens so it has its own pouch, mentioned below:
Great pouch for the Tamron 150-600mm, it has an independent shoulder strap which allows me to carry it by itself.