I feel like an idiot. I did "Strobist" tutorials and still can't figure out how to use my 580EX II. Strobist to me went into a lot of detail while I just want to get light in a darker environment - this is for starters. Yeah, rank newb I upgaded to a 30D with 17-40 f/4 and am taking (trying to) pictures in rooms with normal overhead lighting. The flash on 30D, sometimes, was not enough. I thought the 580 had enough power to hit target at 100+ feet - do not remember exact number. I normally shoot in Tv mode (need faster shutter to catch daughter running around) - have tried "M" with better results, but quality still nowhere close to what I see here or anywhere. Even resorted to the "P" mode and still came up with some very dark or completely dark pictures. Have tried new battery in 580EX. Tried to point straight up to bounce light, and also pointed directly at daughter (she did not like that). Have gone back to my 50 f/1.8 for now - best buy for $70 :thumbup: Any advice appreciated. Thanks.