Archived posting to the Leica Users Group, 2000/08/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The grey card reflects 18% and indeed, most natural scenes reflect 13%, which should be common knowledge as the relevant study dates from 15 years ago. I noted this a long time ago, when I discussed the relative merits of a grey card. If you read the instruction leaflet of the Kodak greycard they will tell you that the grey card is designed and optimised for studio lighting and contrast and there the 18% reflection is experimentally the best compromise. Kodak incidentally notes that when using the grey card outdoors to increase exposure by a half stop to compensate for the 13%!!! Erwin