http://www.nikonchat.com/focusing-problems-nikon-d80/

Camera question?
My work has a Nikon D80. works well, but I think the lens is rotten. you have to put the iso way high when inside, and it is not good at all as regards the camera shots are concerned. we aim only it came with, which is 18-135 mm, manual zoom, automatic / Manual, blah, blah, blah. is that the problem, or am I just a bad photographer? please blame the lens … I tried it in all individual environments. the results have worked better in dark situations, but forget to sports images. I have less than twenty shots really good athletes that I'm really happy with this thing. I say it is the lens … is a cheap lens.
It is a great camera. You should probably read the book and take a class.
Nikon AF-S 80-200 cannot focus