OK, so I am a very amateur photographer. I'm hoping some of the photography gurus of SF can give me a hand. I have a Nikon D40 which takes very nice photos, but I am an idiot at using it. I'm an always-in-full-auto-mode kind of guy. Still, I have something of an interest in photography, and would like to learn more. I'm finding as I take more photos, I am starting to realize some of the shortcomings of my lens and technique. Right now I use a Sigma lens with a pretty massive telephoto - I think it's a 28-300mm. But I am really finding the thing is awful in less than full light. All my indoor photos end up with a yellowish tinge unless I turn on the flash, which is really harsh and glaring. I'm having a baby soon, and would really like a nice lens I could use for basic indoor portraiture and fun shots - I guess I'm thinking 28-55mm or so - that lets in a lot more light than this current lens. Or should I just invest in an outboard flash? I'd gladly accept technique advice, too.