EXIF on the cake cutting picture-
Manual exposure, 1/125, 4.0, iso 800. Without the flash, this would have resulted in an almost black frame. Flash was a 580 II, set for ETTL. Camera body was a 40D, lens was 24-70 2.8L. Focal length was 30mm. Flash on a bracket, head angled at 45 degrees, bounce card out.
Dad dancing with the Bride- Pretty much the same- except f3.5, and the focal length here was 70mm.
I am aware- I can open up the lens a little more, and boost the iso to let some ambient light creep into the exposure- but my experience there is that the photos end up a little soft. It seems that either way, the walls end up a dreary yellow.
Thanks for any input!