I'm totally in over my head with my flash. I bought a 580EX II. It's amazing, after a make all the adjustments. But I bought it primarily to shoot a party after a wedding I'm doing in a few weeks, and I can't seem to get the right exposure on the first try, or even the second or third. Is there some auto option I'm missing?
Like, how you can choose shutter priority on the camera and it sets the aperture for you, and vice versa-- can I do this with the flash? Set the shutter speed and aperture I want, and let the flash decide how much light I need?