Hi Jarhead5811,


Yes, you can use the ST-E2 as a focus assist device without attaching/linking any flashes to it, if your 430ex allows to be set in a 'flash-off' mode then you can use the 430ex for this too. (not sure about this option in 430ex, I know it is present in my 580exII )


If that mode is not present, you can AF with flash(assist) on, then set the flash off and take the shot - if time permits...


...€0.02...


Kindest regards!


Max@Home