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 linkedin.com/in/martinlisius.

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