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My apologies ...
In reply to albonalex,
3 months ago
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... in advance for providing some serious answers (well undertsanding how unfashionable that is).
albonalex wrote:
So I want to learn to sensorially quantify light.
I suggest that you instead consider "sensually qualifying" light instead. Consider the possibilities ...
I will keep as much as possible ISO 100, aperture 2.8, and I will manually adjust exposure until all light makes sense as a difference to ISO 100+ ap. 2.8. But your senses need a fixed point in everything, so, I ask the light masters, which exposure number would be God's exposure?
In the new age of Relative Exposure Index ISO Sensitivity specifications based upon evaluative metering, all moral compasses were long ago lost in the cathedral of consumer enchantments.
Further, the so-called "exposure triangle" is a cruel fabrication foisted upon a gullible public. Actual photographic "exposure" has nothing to do with the "image brightness" that you refer to. See:
http://en.wikipedia.org/wiki/Exposure_%28photography%29#Photometric_and_radiometric_exposure
http://en.wikipedia.org/wiki/Exposure_value#Formal_definition
Similar to ISO 100 being the flatbed of sensitivity and aperture 0 being the lens fully open.
Of course, that would mean zero Focal Length and/or infinite Virtual Aperture Diameter. Nifty.
I guess that you could calculate some cosmical constant to light, from which to derive that x light is the most truthful, and that at ISO 100 and aperture 2.8, when you meet that light, you should definitely apply a certain exposure. But what do I know...
No comment. If you'd like to know more about "ISO stuff", have a look at these quoted excerpts:
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