Hi guys! First post here...
I've read 90% of this thread, and wanted to pick up on one point.
Im pretty comfortable with trial and error with the settings, but the only 2 options I have on my EOS 450D, is 1st or 2nd curtain sync.
These vary from the 3rd option, as I understand it, rear curtain sync, where the flash goes off just before the shutter shuts.
With 2nd curtain sync, im getting 2 flashes, both at the start and end of the exposure. So, in a night club environment, I assume im best using 1st curtain sync? Otherwise il get 2 froze Dj’s in the shot! (useful for some shots, granted).