I had been using an 18% gray card to set my color balance and was happy with the results. The only downside to the gray card was the size and durability - it was difficult to pack and needed replacement every three or four months. I wanted something more compact and durable. I heard rave reviews of the Expodisc and decided to plunk down the 100 bones for a 77mm neutral version.

I've had mixed results with this item. It works adequately in bright, single light situations but in mixed or low light situations, my colors end up being too far off. I understand mixed light is a tough situation but I seemed to get more accurate color with my gray card. Sometimes the colors I get with the Expodisc are just so out there that I end up just switching the white balance setting to the predominate light source and correcting later.

I'd recommend a pass on the Expodisc and invest in some gray cards and a good white balance card.

By Steve O from Camp Fallujah, Iraq on 1/21/2008

When you compare the same image taken once with your cameras' AWB and then one taken with the Expodisk you will instantly see the improvement.
Not real conducive to photojournalism style of photography.

By Mr P from San Diego on 7/19/2007

The ExpoDisk is very easy to use on a Nikon D200. I shoot in different florescent lighting conditions and it can be a nightmare getting the correct white balance. With the ExpoDisk I get the corrections I need without having to fix it in Photoshop.

By Ron the Photoman from Oshkosh,NE on 2/5/2007

I have really enjoyed this product alot as it is easy to use and accurate,saves time in photoshop,and the skin tones are right on and I have lent it to other people and they have said the same thing. This also saved having to carry heavy meter. I say try it and you will really glad that you have it in your camera bag.