Tip for flash users.
When you use a flash off camera, like here, you often use Pocketwizards. Which means the flashes are on MANUAL mode. Like here, wedding organizer Jane Dayus-Hinch, whom I photographed at the Wedding Show today:
Off Camera Flash 1/8 power. Canon 1Dx, 1/80 sec at f/4.5, 1000 ISO
Those camera settings let in enough ambient to act as fill light.
So anyway… if you use an off camera flash, there is one problem. Every 60 seconds or so, the flash goes to sleep and turns off. Meaning you get a shot like this… fill light only:
The solution: You have to set a custom function on the flash to disable the timeout. C.Fn 01 on Canon (set to “1”); menu driven on the Nikon flashes.