simply because of the horrible pun in subject line. Picked up my first speed light, got a SB-600 tonight. So far only have fired it a little on the camera and with the wireless mode. I still need to figure out what these actual settings do.. Any suggestions on little scenarios to set up to learn ( ibstrobistblogspot ) some typical/edge case examples? I also got a diffuser recommended by the camera shop guy... anyone ever use one of these? I played a little with it with my gf and it seems to work pretty damn well. Any idea wtf the white piece is at the top that can either be Velcro down or left lose/pulled back? (pic of said diffuser) and of course mandatory gf pic for OT.