ExpoDisc v3 Professional White Balance Filter

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We introduced the first ExpoDisc white balance filter in 2004, and almost 20 years later, it is still the best in the market.  Even so, we're always looking for ways to make it better. The new ExpoDisc v3 is our latest effort at making the fastest, most accurate white balance tool we can.

Improved Wide Spectrum White Balance

The new diffusion materials we incorporated into ExpoDisc v3 perform better across the visible spectrum (380-700nm), providing better white balance results when shooting in cool open shade or very warm light.

The improved performance of the new materials extends beyond the visible spectrum from 700-2200nm (near infrared), and enables use of the ExpoDisc v3 to set white balance when photographing with an IR-sensitive camera.

New Thin Design with Bayonet Mount Step Ring

The new ExpoDisc v3 design is thinner than the ExpoDisc 2.0.  The ExpoDisc v3 can be comfortably held over lenses 82mm or smaller, and it also incorporates a new bayonet mount allowing it to be quickly attached and removed from your lens using the included ExpoDisc v3 bayonet mount step ring. A single bayonet mount step ring size is included with each ExpoDisc, and additional step rings can be purchased for other lens sizes.

Hold the ExpoDisc v3 Over Your Lens

Mount the ExpoDisc v3 to Your Lens Using the Bayonet Mount Step Ring


Save Time Editing Color

The ExpoDisc can be used to set an in-camera white balance using your camera's custom white balance procedure. This custom white balance will be incorporated into your images if shooting JPEG, or will be added to your RAW images as the 'as-shot' white balance.

This saves a tremendous amount of time editing photos later as every image will have a neutral, measured white balance without having to adjust sliders. Stop fixing your color later with software.

For Photo and Video

ExpoDisc v3 works for both still photography and for video. Use your camera's video white balance procedure to apply a custom white balance to your video. This is a huge time savings since correcting color in video is even more time consuming than for still images.

Exposure Metering

ExpoDisc v3 can also be used for incident exposure metering. ExpoDisc v3's light transmission profile has been adjusted to 14.5% which is consistent with most digital light meters and will provide a more-centered histogram on modern digital cameras.

Calibrated and Certified in USA

We test and certify every ExpoDisc at our California facility to maintain strict quality control standards. The ExpoDisc is tested by hand on a transmission spectrophotometer to ensure its neutrality.  This neutrality is important because using a non-neutral tool for white balance can actually add undesirable color casts to images. Every ExpoDisc v3 includes a quality control card to certify its neutrality.

ExpoDisc v3 Contents:

  • ExpoDisc v3 Professional White Balance Filter
  • ExpoDisc v3 Step Ring
  • Storage Pouch
  • Neck Strap
  • Certification Card
  • Printed Instructions (English); instructions for other languages can be downloaded from ExpoDisc.com

Customer Reviews

Based on 1 review
Duane Hughes
Most accurate white balance device I've used.

I've used white and grey cards for years. I do mostly photography but also some video, sometimes in locations with horrible lighting (crazy magenta shifts from old lights etc) that easily confuses the auto white balance on many camera systems. When one of my white balance cards was starting to look a bit haggard, I decided to replace it the ExpoDisc. I would not say the difference was huge compared to white cards I've used in the past but the ExpoDisc gets me within 100 Kelvin of where I want my pictures/video to be. 100 Kelvin....We're splitting hairs here. I've shot in some venues dozens of times and I can compare RAW files I've taken in the past, calibrated with white cards and compare them to the files I've calibrated my white balance with the ExpoDisc and the white balance on the Expodisc is simply closer to what I view as a true white balance. The white cards I've used in the past were off by anywhere from 100 to 300 Kelvin and sometimes had mild magenta/green shifts. I highly recommend this product if you are looking for a truly accurate white balance tool.