Last Sunday I took 145 pictures at Fashion Sunday in my hometown. Gear: G1 plus 14-45 kitlens. Sandisk SD card class 4, 4GB. AF set to single shot. I noticed that the AF was too slow and the shooting speed was too low. What did I "wrong"? Maybe I must go for AF continue as well as for a faster SD card? Advice and suggestions are welcome, thanks in advance.