Can someone give me the n00b guide to what the stuff is on the back? I have a good feeling i know what the OFF/ON switch does. I also pressed the PILOT button and got blinded. Got that one figured out too. There's a switch that has a green dot on one end, and a (flash symbol)H on the other end. ? There's also GROUP A/B/C (with a button) and CH 1/2/3/4 (with a button) I'm guessing this is if you have multiple flashes tied together or something? There's an E-TTL light. ?? There's lights for 24/28/35/50/70/105. ?? If i have the flash hooked up & turned on & go out in the sun, will the flash fire if it doesn't need to? I mean, do i have to turn it off to make sure it doesn't fire? i feel horribly retarded.