How to create a custom grey balance on a Canon 7D

While Canon calls it a “custom White balance” you actually get a better color balance when you use a 18% grey card. The process of creating a custom color balance using either a white card or a grey card is identical.

1. Take a picture of the Grey Card (or White Card). The grey card should take up most of the frame.
2. Hit the Menu Button
3. Using your M-Fn (Multi-function) button scroll to the second tab.
4. Using the main selection wheel on the back of the camera Make sure white balance is set to custom
5. Below White Balance select “Custom WB”. The last picture you took of the grey card should be there. Tell the camera to use this image.
6. Now as long as you stay in the same light your camera is now color balanced