Hi..I'm really new to photography. I found out that I need to get a tripod to take night shots to prevent shaking. I already bought that but now, I noticed that my pics turned out grainy. Is there a way to correct this problem? Btw, Im using a canon A70. Im using manual settings, with the folowing configrations: Av 5.6, Tv 3.2 and Metering Mode set to evaluative. Thanx alot for any advice given. I'll try to post the pic soon