Hi there, I worked for a company shooting weddings for two years, and my lighting never seemed to be quite what the lead photographer was. I knew enough about what I was doing and wanted to start my own, so I started booking weddings on my own. I'm also a student, and have learned quite a bit that way, too. Here's my problem... I know what settings to use manually, I thought, and have a great flash, but my photos don't seem to be as bright or vibrant as others I see in wedding photos, more specifically during the reception when it's a little dark. Here's my equipment: Canon T2i with a Canon 580EXII flash and gary fong diffuser. I usually have my settings at 800 iso (for less grain) and around 30 shutter speed, 5.6 aperture. My photos seem to come out kind of yellowish. Maybe my flash isn't set high enough? I need some help here. Thanks!