Hello all, Photography's been a hobby of mine for many years. Lately i decided to become a professional. Naturally, the first thing i did was buy a boatload of gear. Up until now i've never used or owned a proper flash - but now i do, and i need to learn how to use it properly. One of the things that i can't figure out came up last night - i was shooting a wedding(brother-in-law, a hired professional was there as well) and as it got darker, i realized my flash wasn't giving me the exposures i was hoping for. To explain - the built-in flash on my Minolta used to alter the shutter speeds and bump them in to the 60-90 area, if i chose to pop it. However, the 580exII on my 30D doesn't do that. The exposure stays similar to what i would use had i not had the flash. How come? If i wanted a f2.8 at 1/15th i'd put the flash back in the bag. Also, i noticed that if i put the camera in P mode, the shutter jumps up to the familiar 60-90. What gives? I guess what i really need is a good book/website on flash photography. Thanks.