I finally got my D200 a few weeks ago. After playing around with it getting comfortable, I took it to my daughter's workshop in school only to find out my lens wasn't focusing. Ok, a little bit of bad luck, but it happens. I go home switch my lens from the 18-55mm (Nikon) to my 55-200mm lens (also Nikon) take some more pictures at my other daughter's play, come home- the pictures aren't sharp. Ok I'm thinking I still have some learning to do (even though the pics I managed to get the day before were crisp.) I just went now to take a snapshot of my kids, and my lens is making funny noises, and won't focus!!!!! I tried it back in my D50 also- same thing. Both cameras had full battery life, and they were in separate camera bags, and didn't drop.... I only have my 50mm Prime, and I'm so scared to use it, I don't want that one breaking! What is going on?!?!?!?!! This may seem weird, but could my D200 be breaking the lens somehow??? HELP! I NEED my camera!!!!