Hi there. I'm having a problem with mirror lock-up on my D80. I've never did it before and I'm not sure where to go from here. What I do is go to menu, mirror lock-up option, OK and I'm getting the following msg: " When shutter button is pressed, the mirror lifts and shutter opens. To lower mirror, turn camera off". After I press the shutter I can hear one click and I can do NOTHING. Blank LCD until I turn the camera off. So when I lock-up the mirror I can't take any photos. Thanks Marek.