It can't be, and I don't think I've ever said it could be.gordon77 wrote: ↑Thu Aug 02, 2018 8:08 amI don't quite see how this externally triggers cameras, it appears it just shows you when a picture is being taken. Anyone got any details how it can be used to trigger cameras?6by9 wrote: ↑Mon Aug 07, 2017 4:00 pmThere have been various requests over the years for external triggers for frame synchronisation. Generally it's been stated that doing such things isn't trivial, and it wasn't. However, as of the 22nd July firmware, there is support for repurposing the camera LED GPIO to change state on frame start and frame end interrupts.....
You can use it alongside the frame rate control to produce effectively a phase lock loop that will pull things in to sync over a few seconds and keep them there.