Introducing the ExpoDisc v3 Professional White Balance Filter. Setting white balance has never been easier with our best white balance calibration tool ever.

Each ExpoDisc is assembled, tested, and certified in the USA using our state-of-the-art transmission spectrophotometer. We care about our products.

Say goodbye to cumbersome gray cards. With the ExpoDisc v3, achieving perfect white balance is easier than ever. Simply place it in front of your lens, capturing the incident light while setting your white balance. It's quick, intuitive, and saves you valuable time.

Take advantage of the flexibility and convenience of the ExpoDisc. Take control of your workflow by setting white balance in-camera, with no additional software required. Alternatively, capture a gray reference image to fine-tune your white balance during post-production, leveraging your preferred image editing software when processing RAW files.

Achieve accurate color balance across the visible spectrum (380nm to 700nm) thanks to the ExpoDisc v3's remarkable 0.9% light transmission delta from 380nm to 700nm. Improve your Infra Red (IR) photography with ExpoDisc v3's excellent light transmission in the near infrared spectrum with just 1.1% light transmission delta (700nm to 1600nm).

Take it anywhere. Measuring at just 9mm thin, the ExpoDisc v3 is thinner and lighter than its predecessor, making it easier to hold over your lens and to slip comfortably into your pocket.

For those who prefer direct attachment, the ExpoDisc v3 introduces a redesigned bayonet mount. Just thread the included step ring onto your lens and quickly twist the ExpoDisc v3 onto the step ring to set your white balance.

Calibrated to meet ANSI standards for digital light meters, the ExpoDisc v3 delivers a 14% light transmission and a notable 1/3 to 1/2 f/stop improvement in exposure accuracy.