Grey Cards

Quote:

Originally Posted by Colin Southern

Whilst it's true that the quality of "found whites" (or more correctly "found spectrally neutral objects"), often it's either a case of "use what you can find" or "nothing at all". It's always a bonus when someone has included a reference, but often I get images from others for correction and printing that don't contain such a luxury.

Some people are excellent at nulling colour casts by eye, but I'm not so good -- so usually there's something in the scene (concrete, writing, paper etc) that gets it closer than I can (as a starting point anyway).

It's the "B" solution, but it's still better than only the "C" solution.

It's a good solution - I've used white t-shirts or other white objects in a crowd at events for WB - sometimes I "eyedropper" a few of them and take an educated average/guess.