OK, so I'm still trying to figure out what to buy. I'm pretending like I have a clue, saying crap like "I'm thinking about the 18-70mm lens." But the simple fact is that I have really no idea what that means. The camera I'm looking at comes with an 18-70mm, someone has suggested that if I get that, then I should also get a 70-300mm, and I'd be set. Now Hobbes and Daniel are saying that I would be just as good with a 50mm. So what do these numbers mean? I know that literally, it has to do with the focal point hitting the film/sensor, but what do the numbers mean? And isn't one that has a sliding range better than a fixed one? That is, wouldn't the 18-70 DO what the 50 does? Thanks.