WhiBal for exposure?

[Meerkat]

I have been looking at purchasing a Whibal and I understand that their primary purpose is for getting correct white balance. As they are a grey card can they also be used to get a correct exposure reading?

If not, what would you use? Would you cary two items? A Whibal and also something like a Lastolite Grey Card (I think they are called an Ezybalance)?

Any comments and sharing of your experience would be appreciated.

[dchew]

Whibals are not 18% gray, so they cannot be used for exposure without some + exposure compensation.  However, with some simple experimentation you could use it as a standard for exposure, much like others use green grass, blue sky, their hand, black camera bag, etc.

I forget exactly, but I thought somewhere in the website he states how much brighter the whibal is than a gray card.  The spec on the whibal for LAB brightness says >70, which tells me they don't care so much about how bright it is vs. ensuring it is color balanced.

Dave Chew