I would like to know how to shoot computer screen images for a film I am making. Do I simply focuss the camera on the computer screen or is there some technology that I can use? Thanks, Jeremy
You can do both ways.
There are multiple software designed to capture screen (such as Fraps for windows - http://www.fraps.com/)
You also can shoot the screen with a camera, but for great results you need to adjust the shutter speed to the refresh rate of the monitor. Note that monitors may have different refresh rates that can be changed by the user.
Color temperature from the display should also be considered.
Do some research on this topic.
