I purchased a DSLR yesterday (600d t3i) and will be shooting a friendís birthday party next week. I want to shoot at 1280x1080 with a Frame rate of 50fps. My question is shutter speed, should I be using the old double method which means I should set my shutter speed to 1/100? Everywhere I go I read different things but is there not a norm for this? The shop where I purchased it from said shoot 1/50 no reason to go any higher, online I see 1/100 (double your fps) and some forums even say 1/150. Please help. I just want to film the party and not come home with footage that is jerky. I would also to love to slow it down in post where my friend blows out the candles.