Hi-
I have had an FB tube for a few years now. I originally programmed the tube using a Canon 5D mkii and a 100mm f/2.8 macro leans. I now have an EOS R body and the same lens (it is the EF version, not the RF version). I wanted to re program the tube to have more steps, but it doesn’t seem to want to program. I have the optical cable plugged into my Windows 10 computer’s headphone jack. When I try to program it, nothing happens. The software counts down, but there is no confirmation light on the tube when the countdown ends. The tube is working correctly (using the original programming settings), but I want to change them, as the steps are too wide. Any help would be appreciated. Thanks in advance.