Basic Betacam Camerawork, 3rd Edition

Black balance

Black balance sets the black levels of the R, G and B channels so that black has no colourcast. It is normally only required:

•	when the camera is first used or if the camera has not been in use for some time
•	if the camera has been moved between radically different temperatures or the surrounding temperature has significantly altered
•	on DVW-700 cameras when the gain selector values are altered.

First, white balance to equalize the gains and then black balance; then white balance again. In automatic black balance (e.g. on the DVW-700), the black balance is adjusted after the black set is adjusted. The black shading will then be adjusted if the automatic black balance switch is held down during the black balance adjustment. ...