« on: November 01, 2012, 06:04:13 PM »
If you had a camera that had the DR of the human eye but only shot one frame every 10 minutes at ISO 100 only and was only manual focus...I've read in a book of a Russian author (not sure if it was translated to English) that human eye has 5-6 stops of DR. And the reason we can see much bigger range of lightness levels is the ability of our eyes to adapt to the rapidly changing environment.
The book's author was a researcher in photography so this statement might be true. Did anyone hear anything like that?
Yes I have that somewhere.
I always was told our eye has a massive DR but not because of the optics but how our brain can dynamically adjust areas of a scene to make blacks brighter and highlights darker. Kinda like dynamic area ISO.
Dynamic range is the total sensitivity range. Just like with a camera and a computer, the eye/brain configuration chooses which range out of the total sensitivity range to "process to". I think our eyes are capable of well more than 5-6 stops on average at any given moment, but I do not believe we can see the entire 25+ stop dynamic range our eyes have all at once. Exactly how much we can see in any one go I can't say, although if I compare my eyes to my 7D, I can definitely see more than 11 stops at a time. My 7D will either clip highlights or block shadows if I try to capture a scene with 12 stops, but my eyes seem to concurrently handle the highlights and shadows of the same scenes just fine.
Our eyes are like D800 where we can (naturally) pull out a lot of shadow details instantly.