burkphoto wrote:
https://www.google.com/search?source=hp&ei=Fd-NWunlNeq0ggexyq7YDA&q=history+of+18%25+gray+card&oq=history+of+18%25+gray+card&gs_l=psy-ab.3..33i22i29i30k1l10.608.7962.0.9530.25.24.0.0.0.0.140.2003.20j4.24.0....0...1.1.64.psy-ab..1.24.2001.0..0j35i39k1j0i131k1j0i20i264k1j0i131i20i264k1.0.FLvvCamT5wE
Knock yourself out reading all the answers. Lots of debate out there. 12%? 18%? Meh... I'll leave the whys to the scientists.
What the hell. All I know is, if you set a camera on Natural or Neutral Picture Style, and make an auto exposure of nothing but a gray card, then translate that readout of ISO, f/stop, and shutter speed into actual FULL manual camera settings, THEN do a white balance off the same gray card, you will get VERY accurate color rendition of your subject. It might not be perfect, and it might not be what you want in a raw file, but it is a great starting point for straight-out-of-camera JPEGs recorded under controlled lighting conditions.
https://www.google.com/search?source=hp&ei=Fd-... (
show quote)
do you mean create a custom white balance using those settings for a photo of the gray card?