Hal (et al.), thank you for helping me understand Nikon's flash system. Fortunately for me, it usually just works . This reply got me thinking, please tell me if I'm wrong. Flash exposure is determined by the amount of light that hits the sensors in the flash exposure area. So any light that is reflected back to that area is used to determine exposure. So, for example, if the flash exposure area is on the subject's cheek, and both group A and B reflect off that cheek, wouldn't the "base" power be determined by A+B? And the actual power of each flash determined by the relative FEC?
I think I made that clear as mud. Basically, I think I'm asking "Won't CLS compensate for overlap if the overlap is in the flash exposure area?"
Ok, I just thought of a simple experiment. Two lights in two groups hitting the same target with the same power. If it overexposes the target then I'm wrong. If the exposure is correct then I'm right. Right?
"The wisest follow their own directions" -Euripides "I thought there would be more elephants" -C. Columbus