Why 'more or less stopped using ISO'?

Started 9 months ago | Questions thread
crames
Regular MemberPosts: 192
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Re: Maybe this will help.
In reply to bobn2, 9 months ago

bobn2 wrote:

crames wrote:

bobn2 wrote:

If 'brightness' is dependent on 'absolute luminance of the stimulus' then there is no such thing as 'ISO'.

Ok, I'll bite. How so?

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Bob

How does brightness figure into this? That is, CIE brightness, or are you using another definition?

I don't see how the connection between luminance and brightness would cause there to be "no such thing as ISO."

You can calculate a brightness for an sRGB value of 118, since the viewing conditions are defined and you have enough info to plug into a CIECAM02 calculator.

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