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 in either the 77mm or 82mm size.  The 77mm and 82mm step ring can also be purchased separately here if you want to have both sizes.