Fire on Focus Confirm

[ChadS]

Joe,

On my camera (T2i) can use the exposure lock button to do just that. Depending on how you have your AF/AE options set in your custom menu (again, for me) the AE occurs when the AF hits. The same is true in MF when it beeps. Click hold the exposure lock button (on my camera it's the one that's the zoom-out button for live view and image review). There's an asterisk in the viewfinder to let you know it's locked. That'll hold the exposure for successive shots unless you take your finger all the way off the shutter. That seems to force it to a new exposure.

Not sure how to do it with an external trigger when it'll reset the exposure or not. I'm sure a little experimentation will show you how it works. In my office I point at a dark corner of my desk then the bright window and can clearly tell when the new or old exposure is being used.

Good luck

edit: ok, you said expose not exposure - my bad. let me investigate.