I am shooting a small wedding for a friend - she knows I am not a professional but trusts me that I will do anything I can to make the pictures look right. Okay so...I bought the Canon 1.8 the other day and played with it since it is in a catholic church and the lighting is dim. The test pictures were ok - but I want better. Right now, I am going to go for it and buy the Canon f 1.4 and maybe I will be happier. My question is should I still shoot at 1600 and app. 1.4 - since with the 1.8 I was shooting at 1600 and app. 1.8? This is probably a no brainer - but thought I would ask. I have to say - the test pictures had good lighting - but just a little grainy, not too bad. Thanks!