Extreme newbie question. I am not a flash person & I don't take many evening shots. However, when I started to try out my flash with my camera, I am confused. With my flash mounted & turn on, my camera meter still read the same setting as though no flash is mounted. Is this possible? I use manual mode & normal sync speed for my flash. What am I missing? I use canon camera & canon speedlite 420EX. As always, thanks for all helpful advise.