Is there a way of triggering focus stacking from the shutter release button or a remote? It seems like the only way to run it is from the ML Menu?
Looks like this isn't possible which is a real shame, when triggering exposure bracketing with the remote is possible. Guess it's a limitation with Canon't firmware. Only option seems to be using a piece of hardware like the Promote Controller: https://www.promotesystems.com/downloads/manuals/pctrl1/pdf/Promote_Control.pdf (https://www.promotesystems.com/downloads/manuals/pctrl1/pdf/Promote_Control.pdf).