I have been trying to shoot 2nd curtain off flash shots using a ST-E2 and either a 580EX II or a 430EX II without any luck. Is this even possible? I've tried setting this up on the XSi or the 50D. I can program 2nd curtain flash with the flash mounted on the camera but when I take it off and go through the ST-E2 I nolonger have the 2nd Curtain option.
What am I doing wrong?