Why 'more or less stopped using ISO'?

Started 8 months ago | Questions thread
Luke Kaven
Veteran MemberPosts: 5,252
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Re: Maybe this will help.
In reply to Iliah Borg, 8 months ago

Iliah Borg wrote:

crames wrote:

Only if you know how to convert to XYZ, where Y is luminance. CIE states that brightness is relative luminance. Relative luminance is defined as photometric luminance normalized to 0..100 in such a way that reference white is 100.

No, Brightness is an absolute percept,

Subjective absolute You do not know brightness, you can only say which one is brighter. Forget absolute.

Yes.  As Wittgenstein would say:  You already know what it means.

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