I had to send in my kit lens for my D90 because it was not turning, in the mean time i broke out my 35mm lens and started using it (seriously for the first time). I've noticed things are not as well focused as I would hope. how can i tell if its something i'm doing or the camera is messed up? I tried some test pics with this:
They seemed relatively good, but while taking pics with random subjects and other papers it seems to be not perfectly focused when stopped down to 1.8. I would say its a bit front focused, how can you tell for sure? Do i need to send it to Nikon to test/calibrate it? Would they do that under warranty, if not what would be the cost?