White balance, how to determine?

[Sporgon]

no, some try to make better profiles than they from adobe etc who are more general than specific for the camera
take d800 as one example, a tool who can be profiled a lot better, the camera is like a fine tune instrument compared with eg Canon's color filters that are thinner and gives not as many shades of a color

Just as well; you can profile the green cast out.

 

[paul13walnut5]

qpcard and software.

 

[Mr Bean]

Accurate colour in flower pictures demands camera profiles and the easiest way to get them is with an X-Rite Color Passport.

+1 on the X-Rite Color Checker Passport. Small, light, easy to slip in a bag, and quite tough.

Thanks all, for the replies and ideas. I'll try the grey card / white card as a test over the coming weekend. But, the Colour Checker Passport seems (to me at least) to be the most scientific approach to the issue. When I've tried to use the eye ball approach, that is, does it look right on the screen, usually through sheer dumb luck it works, sometimes