Ok so I got my D50 in the mail, and got it all ready to take it's first picture... battery is charged, memory card is in the slot, the strap is on, and the 18-55 lens is on. So, I start to push halfway down and the lens TRIES to focus, over and over again. It eventually does, and I take.... but the next picture is the same way, focusing is sort of loud (not a problem really) and it clicks back and forth, forever, trying to focus and not ever really finding a place to focus. Any reason for this? Anything I can do? <- me. Very sad!