Not a flash genius I'm getting into it and hope you guys can help me clear a hurdle.
I have a 50D and a 580EX (not the EXII)
Looking to enable and use 2nd curtain sync in the 50D menu in "Flash Control" under the External Flash C.Fn setting camera I get the,
"This menu cannot be displayed. Incompatible flash or flashes power is turned off." (The flash is on.)
In the External flash funct. setting the Flash Mode E-TTL II, Shutter sync. 2nd curtain, and FEB are grayed out. The Flash exp.comp and E-TTLII Evaluative or Average settings are accessible.
If I just put the 580EX in E-TTL mode and choose the >>> button it seems to work but now I am insecure about what I am doing.
I have the 50D and the 580EX manual .pdf's up now reading and my email program up hoping for a reply from here as I sort them out.