snowbear wrote:
Are you wanting to use the grey card for white balance or exposure? The easiest way I've found to handle WB is just shoot raw, then tune in post. For exposure, I've been told you can meter off the back of your hand, or green grass if there's any around.
I think that you mean the palm of your hand. The article that I remember was in a photography magazine years ago - when we were shooting film.
The palm of the hand reflects the same for all ethnic groups. I don't think that the back of the hand would.