making my first foray into the light. i am trying to use my SB 600 off camera and not have the pop up flash fire. i set the commander mode with the -- for the pop up flash, the channels etc are set fine for the SB600 which fires, but so does the pop up flash. the camera store guy says, "yes, that's right, but the pop up flash fires after the shutter is closed so it will not effect the image." this doesn't feel right, especially if I'm using front curtain sync. i feel like an idiot, but i've worn out my fingers trying all kinds of buttons. does anybody how there know if the store staff is right or am i trying to do something that this flash simply cannot do? thanks!
