On 12/06/2021 14:12, #Paul wrote:
Fredxx wrote:
I'm sure the eye response is very different to film emulsion response.

Also, which may be relevant here - eye responses differ, sometimes
by quite a lot - between people.

They do indeed.

But the relevant blue, red, green cones in eyes have a similar response
in terms of wavelength.

Where the difference you mention comes from having different proportions
of these cones, or even one type missing.