LayerMask
Investigating AF assist from an ST-E2
Canon Type Hot-foot.
Orientation: you are looking at the pin layout of an ST-E2 inverted, looking down on the 'hot-foot'.
Pin layout:
It seems that to elicit Focus Assist from an old ST-E2, you need to apply c 5.0V across X to Y. I'll add polarity when I've doubled checked it Edit: X(-) & Y (+) & 4.5 volts is enough. But, you have to keep the ST-E2 awake - still working that one out . . . Edit: just making that circuit seems to be enough.
USB packs can deliver 5.5V, drops to 4.5V when resting.
Investigating AF assist from an ST-E2
Canon Type Hot-foot.
Orientation: you are looking at the pin layout of an ST-E2 inverted, looking down on the 'hot-foot'.
Pin layout:
It seems that to elicit Focus Assist from an old ST-E2, you need to apply c 5.0V across X to Y. I'll add polarity when I've doubled checked it Edit: X(-) & Y (+) & 4.5 volts is enough. But, you have to keep the ST-E2 awake - still working that one out . . . Edit: just making that circuit seems to be enough.
USB packs can deliver 5.5V, drops to 4.5V when resting.