The strobes were set up to photograph the dance floor at the reception. I do not use pre-flash on my Canon 430 ex and in my case, I used spot metering so my flash properly exposed my subject and the room strobes lit most of the rest of the dance floor. It improved my shots quite a bit. -----Original Message----- From: owner-photoforum@xxxxxxxxxxxxxxxxxx [mailto:owner-photoforum@xxxxxxxxxxxxxxxxxx] On Behalf Of David Dyer-Bennet On Mon, February 16, 2009 13:05, Gregory Fraser wrote: > On the other hand I was at a wedding once where the 'professional' > photographer used visible light slaves and everytime I or anyone else > with a decent flash took a photo, we got full use of the all the pro > photographer's strobes. I wonder if that was a deliberate ploy to keep other people from getting copies of the group photos (that being the main place studio lighting shows up at weddings that I've seen)? Probably come out very seriously overexposed for everybody else! Of course these days, bringing the discussion full circle, the pre-flashes would probably have triggered the studio strobes, thus preventing them from washing out the actual photo that followed. :-) --