Quote:
Originally Posted by r_fredrick_smith
They very well may both be gray, just not the same shade of gray. One gray is not warmer than the other or cooler. If something is gray it means that it has equal parts of RGB. So the gray represented by r128,g128,b128 is gray and the gray represented by r64,g64,b64 is also a shade of gray. One is lighter than the other (not cooler or warmer). Cooler or warmer would mean that the rgb values were not equal. So I don't believe you are using these terms in a way that avoids a certain amount of confusion.
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Yep, absolutely with you on the perfectly even grey...but I don't see that. The gray varies...for example in the 3rd block on the image balanced against white, I see it as 192, 188, 183. As I said above, it leans toward red. I think that's a consistent use of "warm" to describe the grey. Given it's age, maybe your card faded a bit inconsistently. Actually, if it's that old that's pretty good. Photographs that old would have shifted much more.
Meanwhile the white square on the same image is 240,240,240. So, the CWB against the white was dead on!
How do you like the Expodisc? I understand you have to take an incident reading with them?
And too bad I couldn't talk you into that test. Sadly, I love the tech side of photography a bit too much...