Daniel Flather , Apr 17, 2010; 11:14 a.m.
What should the settings be for Flash on the 7D? I have a 580EXII and at night outdoors if there is dust in the air I see the dust (Looks like snow) how do I get rid of that when shooting? Up my F stop? Tame down the 580EXII?
Get the flash off the camera, this will help. Bounce the flash off a wall or bring something to use as a reflector.