Hi Gunther and all,

What should be the minimal interval time allowed by my pro timer 3?

Initially it was .4 seconds minimal - then after changing autofocus time to 0ms and release time to 50ms, I am able to achieve .2 seconds interval.
I understand that under 99+% I wouldn't need .1ms interval, but I have seen that it should be possible?

Is there another setting I am missing that would allow for .1ms interval?

Thanks,
Drew

The official minimum interval on the LRT PRO Timer is 0.3 secs, see the specs: https://lrtimelapse.com/lrtpt/specifications/
usually I wouldn't recommend to set the AF time to 0 - most cameras need a short AF signal.
If your setup works works with 0.2 secs, that's of course great!