#4. "RE: Digital White Balance Cards or 18% Grey Cards" In response to In response to 3
Fountain Inn, US
>For the most part I would agree with you, except for one >point. > >Using anything white at hand is OK as long as OB’s (optical >brighteners) are not present.
Pete, just my personal opinion, but I think we have a tendency put WAY too much emphasis on these technical fine points. I think you'd be very hard pressed to find the difference in a photograph that used an "OB" enhancer in the table cloth, and one that was taken off an old well worn tee-shirt.
I would bet that most wedding or event photographers and even fashion photographers will tweak the finished white balance by eye to suit their own artistic tastes considerably more often than they will insist on perfect optical white in a specific photograph.
And you have to remember that a white object in an image is never just one shade of white. If it bends around an object, the shadow is a completely different color than the highlight so it is only the illusion white that we are looking for anyway.
My personal preference, and it is simply that, a preference is NOT to carry a lot of extra stuff in my bag, even if it's a .01 cent coffee filter. There is ALWAYS something white enough in the image to get a white balance reading from. Ive even used the whites of eyes in post to get a greypoint reading, then tweak the final balance to my own taste.