ExpoDisc EXPOD2-82 82 mm 2.0 Professional White Balance Filter (Black)ExpoDisc 2. 0 The Original White Balance Filter for Digital Cameras Gets Even Better Set white balance, meter for exposure, and dust map your sensor with the only calibrated and certified 18% transmission incident light metering filter. ExpoDisc 2. 0 introduces user selectable Warming Filters (gels) and an improved mount. ExpoDisc Saves Time Editing White Balance in Photos and Video When used to set a custom white balance, the ExpoDisc consistently