Expodisc Alternative : Coffee Filter 2
Coffee Filter UV Filter
I took an unused Tiffen UV Filter, unscrewed the retaining ring, and slipped the coffee filter between the ring and the glass.
Overall it works remarkably well. Like the normal Expo Disc, you stand in place of your subject to be photographed, and point the camera TOWARD the source of light. (not toward the subject to be photographed) You then perform a manual white balance setting with your camera. After this, the camera will be properly calibrated for the light in the room...
And, if you have a spare filter, you save about $88.95. If you don't have a spare filter, you can simply just hold the filter in front of the lens to take the WB shot.
Other photos in the test sequence are here:
The Test Examples:
Directions to make the Filter: