How to easy adjust white balance of negative films

Here I'll introduce you the common usage to adjust white balance of negative films. (demo with FilmScanner v1.1)

1. put your negative films on the iPad(running Lightbox mode), and find the film base(the orange transparency part)

2. use your iPhone running Viewer mode.

3. put your iPhone on the film, and camera targeting the film base part.

4. if the preview image is too dark or too light, adjust exposure(tap screen twice) first.
5. let iPhone adjust white balance about 1 second.

6. remember lock white balance before you take iPhone.
7. now, you should get a well white balance result!