Originally posted by JeffJS There are several schematics online for these types of releases. I THINK, that the Tip of the plug is the release while the ring (the part the third wire is connected to) is the focus. So, assuming the plug doesn't short the two (even if it does), it may work fine.. But don't quote me as stating fact.
you are correct, the tip is the release the small ring is the focus/metering, and the last longer body of the pin is ground
Plugging a 2 wire remote into the camera will turn the metering / focus on on the camera. If you are focusing manually then set the switch to manual also to make sure the body does not try to move your focus position.