Fri Sep 15, 2017 1:56 am
Well, it's the human brain that does most of the work. We compose an illusion from scans of the environment. The "automatic exposure" of the eye varies only between a bit over f2 to somewhat over f8. The rest is biochemical adaptation, which is relatively fast going from dark to bright but very slow the other way round.
Consequently, you'll not have those 30 stops at your disposal for one scene, they describe the range between light that hurts and a scene that you may perceive faintly after being exposed to very low light levels for up to 20 minutes (and enough vitamin A at your disposal). A range of 15 stops for one environment seems more realistic.
You can find some very fine reading composed by a fellow filmmaker starting from here:
http://wolfcrow.com/blog/notes-by-dr-op ... ye-part-i/Warning: not adequate for the scientifically challenged!
Now that the cat #19 is out of the bag, test it as much as you can and use the subforum.
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