thank you very much Richard60 !

Yes, I think I am getting it now. Change the setting, then use the dolly dial. Although Im already disappointed!

I had tried this before. on Main camera I changed the setting THEN MOVED THE LEFT CAMERA CONTROLS. They were virtually unchanged, so I didnt think it worked.

I do prefer using the left controller, but pity, I guess it doesnt link with the settings you describe?

But worse now, HOW DO I DUPLICATE THIS FOR THE TOP CAMERA? that is essential for large scene work! and I cant get it to work.

Finally I now think a MASTER SYSTEM is needed to simplify all this endless tweaking!