Albuqshutterbug wrote:
I was shooting with the 580 for the first time mounted on top of the body and the box was just short of the front of the lens. My mistake was pulling out the white shade that screens the upwards portion of the flash. It was the saw setup I posted for the Chevy metal stack I did but with the 580 EX II vs the 340 EX II.
That explains it, you will get better illumination by taking the flash/diffuser off the hotshoe and getting it closer to the end of the lens.