ClarkJohnson wrote:
The TAP-in console is not absolutely necessary, but is a useful accessory. Firmware updates are few and far between, and most lenses should not require tuning anyway. BUT, if you do want to update the firmware on a newly purchased lens, or tweak the focus, go ahead and get it. It is extremely easy to use as long as you have a computer with a USB socket.
Most of the new Tamron lenses for Sony E can be updated directly on the camera.