I did some more experimentation with various settings today, and I learned what may impact how the in-camera flash settings are transmitted to the Speedlite via the optical connection. I set the wireless function to the Speedlite only which resulted in the built-in pop-up flash going off anyway, but I think that action is what transmits the data because I noticed afterward that the camera's settings appeared in the Speedlite LCD. I also ran another experiment. I took a picture with the Speedlite "on" off camera, and of course, the built-in flash went off. Then, I turned the Speedlite "off" and took the picture again. The pop-up triggered, but it did not impact the picture at all. When viewed, it was very dark with almost no light in the picture. When I checked the Speedlite LCD, sure enough the camera settings appeared. So, through this incredible hit-and-miss process I learned that when choosing the Speedlite only on the wireless function the built-in, pop-up still triggers but is not synchronized with the Speedlite. "I think" that disabling the pop-up altogether is what may block the settings from transferring. What a journey this is turning out to be. I am awaiting the arrival of a TTL Cord which I ordered a couple of days ago, and that will change how everything is done because I will return the flash to "Master" status, and it will be run off of the External Flash menu, which will give me a wider range of options.
