White balance is the process of calibrating your camera to show colors accurately under varying light conditions. Think of it as making sure the color white is always white so that your image doesn’t have blue or red tints.
On a vectorscope, black, white and gray are signaled in the center, and colors are indicated by different boxes on the screen. Red is at the upper left, yellow is at the left, green is at the lower left, blue is to the right, and magenta is to the upper right. The strength of any color is denoted by the distance from the center of that color. A saturated color will appear toward the edge of the vectorscope and a color that is going to appear over saturated will go beyond the edge of the circle.
1. Place a white card near the subject
2. Zoom-in and fill the frame with the card
3. Press the white balance button.
4. Check the vectorscope. ( An all-white picture should make the signal retreat into a white dot in the center )
