Quote:
Originally Posted by RacePhoto
I am using a gray card, but you have to have all the light sources the same or you get mixed light which is impossible to correct for. But you knew that.
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Ummmm...no actually, how exactly are you using your grey card !! Grey cards (or Gray depending which side of the wtaer you are) have been around since long before digital, the technique for correcting casts may have changed slightly but the fundamentals are the same, except instead of using an enlarger/filters/chemicals now you do it on a computer.
The other use is for exposure readings using a light meter, different thing altogether.