The absolute minimum white area is as follows:
Rectangle centered on the screen: the lengths of the sides are 70% of the length or the width of the screen.
The white object must be within the rectangle and have an area of 
at least 10% of the screen.
4 |
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Note |
Make sure there are no bright spots in the rectangle.
4 Adjust the lens iris.
If the lens is manually adjusted, adjust it as appropriate. If the lens has an automatic iris, set the automatic/manual switch on the lens to automatic.
5 Push the AUTO W/B BAL switch to WHT, and release the switch.
AUTO W/B BAL switch