I've had my D5100 for a few years and have finally decided to learn how to use it non-automatic mode. I've been playing around with the settings, and I'm not sure if I caused it, or if dirt got in the lens, but my lens got stuck at about 24 mm and I couldn't set it any further than that. My husband "fixed" it and it goes past there now (he says he didn't force it), but now when I turn it, the area it was stuck at catches a bit and it doesn't glide like it should. When I was playing in manual mode with some settings it wouldn't let me take a picture (not sure if this is related) and just makes this horrible grinding noise. Even as a complete amateur I can tell it's not a good sound! Is the kit lens (18-55mm 1:3.5-5.6G) worth getting looked at to be fixed? I just purchased a 50mm 1.8g lens and was wondering if that would substitute. I take pictures mostly of my family and just everyday stuff, nothing fancy. Thanks!