Hey guys, I just got my Canon T2i DSLR today and have been messing around with it for a bit. I've read much of the manual and want to try out a few shots, but every time I take a photo and try to review it on the screen, it's just black. All the lens caps are off. Is there another reason? Sorry for the noobiness. Also, when I review the pictures on my computer, they are all black. Okay, the ISO was on 100 and I was inside. After increasing it to 1600 the screen became visible. Is that really how high I need it just to take shots inside?