Bernard:
I have a bunch of TechArt adapters and another brand. I tried upgrading the TechArt adapters, but the software was so janky, overprinting, with no instructions that work that it is hard to see anything work.
The adapter that I have that is just a "dumb" adapter seems to work, but so far I have not found a way then to change the shutter-speed (light). All of this works fine on version 1 of the Z7.
I have another dumb adapter that works, but I can vary the exposure only by using the top button on the Z7II to vary exposure. As for the Tech Art, perhaps my micro USB cord is too long (10 feet), so I ordered shorter ones.
I am thinking of gett the modified Sony A7rIVa...with the higher res LCD screen as they become available. Also, do you have the Sony A1 and if so, how do you like it?