Quote:
Originally Posted by AstralTraveller
The second is a chemical change in the retina which increases its sensitivity. I was told that that takes about 1 minute for every year of age. So us old fearts take about an hour to become fully dark adapted whereas young wipper-snappers can be dark adapted in under half an hour. So you need to be more protective of dark adaption as you get older.
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I suppose if the exit pupil experiment did show a difference (all other factors being the same) between "pupil dilated to match exit pupil" and "fully dark adapted", that difference would be (almost) entirely due to said biochemical component of the process.
I think the two DSOs I looked at really are unsuitable for a proper test (too bright), and rather that looking for detail, a better measure could be "detected" vs. "not detected" as astro744 suggests, and doing that for a range of targets.
Interesting.