Does ExpoDisc work?

Hi;

I was wondering if any of you had any experience with ExpoDisc for correcting color cast and white balance issues? Does it work? Here is the link to their website and from what they claim, it looks like a good piece of equipment to have.

http://www.expodisc.co​m …t_detail.aspx?i​d=MTAwMQ==

I was trying to find a way to correctly expose my shots in my 20D. Thanks.

MALI

Does it work?

It works at making a living for Ed Pierce.

The three-tone tool has limited usefulness in helping you set exposure values. It isn't much better than a gray card, which is much less expensive.

It has limited usefulness in helping you set white balance. There are easier methods.

---Bob Gross---

The method it uses to get a white ballance reading is extremely dodgey i must say.It doesn't make sense at all

I asked the same thing a week or so ago. A few people that have them claimed they worked quite well. Here is the thread:

http://www.photography​-on-the.net/forum/showthre​ad.php?t=113952