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New ExpoDisc v3

Full Spectrum White Balance

Why Expodisc?

The Original, Award Winning Professional White Balance Filter


We Individually Calibrate Each ExpoDisc for Neutrality

Only a truly neutral white balance tool like the ExpoDisc will produce consistently accurate color balance in your images.  Every ExpoDisc is assembled and calibrated in the USA using custom filters to make sure it transmits light evenly across the visible spectrum.  Other tools may claim to be neutral, but do they actually take the time to ensure their accuracy?


ExpoDisc Gives Consistently Great White Balance in Only 10-15 Seconds

No special software and no post processing is required. 

Smaller and easier to use than gray cards and targets, ExpoDisc fits in a shirt pocket and only requires you to cover the lens to set a custom white balance.  This is usually much quicker than placing a gray card or target in your scene and then taking a reflective reading at a distance.


Custom White Balance Gives You Consistently Great Color

Even the best digital cameras struggle with consistently reproducing accurate color. Images shot with incorrect white balance may have unnatural looking red, yellow or blue tints that are time consuming and difficult to correct.


To help photographers cope with this problem, digital camera manufacturers designed their cameras with multiple white balance functions, including Custom White Balance, Automatic White Balance (AWB), and factory Preset color temperature settings.


Unfortunately, Auto White Balance (AWB) often produces inconsistent color results, and the color temperatures assigned to the camera's Preset white balance settings often do not reflect real world lighting conditions.


Using your camera's Custom White Balance function remains the most reliable way to consistently reproduce accurate, balanced color in digital cameras.  The custom white balance function eliminates the inconsistencies of AWB and the gross generality of factory Preset color temperatures because it allows the user to calibrate the camera to an exact color temperature at image capture.


Hold the ExpoDisc v3 Over Your Lens

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.

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

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