Hello from fort worth! hmmm... I am not one to ask this question, but are you speaking of using the flash after the ceremony? We don't use flash during the ceremony, but I have been practicing using my (crappy) photogenic light on just model light as a one light source. My last post
http://www.opensourcephoto.net/forum/index...mp;#entry142278was done with that technique and a high ISO and it seemed to work great to me, but beyond that the q flash works great at night and has a high range. I prefer it diffused so it doesn't blow out the dress though. Diffused makes it a little less irritating to the guests and couple as well. I hope that you find some answers here. There are a lot of very smart photographers here. I am awful at flash
Either way... hello from fort worth!