Alley in Pisa, Italy

by Lars Kotthoff

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4
votes
2answers
197 views

How can several gray card shots help with metamerism?

In a comment to my answer on gray card angles, @underarock mentioned having used several gray card shots at different angles to cope better with metamerism. This sounds intriguing, but I'm still not ...
14
votes
1answer
298 views

Gray card angle during custom white balance calibration - does it matter?

Do I have to have the gray card on a specific angle while taking a photo for custom white balance calibration? Or it is irrelevant? I am guessing that the gray card plane should be perpendicular (90 ...