Martin Lisius has a white balancing tip for you that involves using a simple iPhone app.

Using an iPhone app to replace a $1000 spectrometer? from Martin Lisius on Vimeo.

In this video, I show you a quick, easy, and inexpensive way to take a color temperature reading off an 18% gray card using an iPhone app called ProCam ($4.99). You should be able to do this with a white card as well, but I use a gray card for both white balance and exposure. This is especially useful for those shooting with a camera like the Sony PXW-FS7 in Cine EI mode which doesn’t currently offer custom white balance. I just happened to stumble upon this one day when using ProCam to shoot stills with my iPhone.

Gear Used:

ProCam for iPhone (
iPhone 6s (
Novoflex Controlcard (
Sony PXW-FS7 (
Canon 24-105mm f/4.0 L (
Metabones Speedbooster Ultra for Canon EF to Sony E (
Sony a6300 (
Sony 16-50mm f/3.5-5.6 OSS Zoom Lens (

Martin Lisius is a producer, director and cinematographer at Prairie Pictures, Inc. ( He is the founder of StormStock, a collection of weather and climate footage he founded in 1993 ( Full bio at

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