Thread: Low light hunting scope circa 2021 ?

The trouble with the 7 mm exit pupil rule is that not many people over the age of 40 or even younger would be able to utilize it. As explained below by the U.S. Department of Health and Human Services.

"The older we get the less our eyes dilate. The passage of time can also weaken the tiny muscles that control your eye’s pupil size. The pupil becomes smaller and less responsive to changes in light. That’s why people in their 60s need 3 times more light for comfortable reading than those in their 20s. Smaller pupils make it more difficult to see at night".

Years ago many Japanese scopes were manufactured in 4 x 40 claiming high low light transmission. It was just marketing baloney as no one had an exit pupil of 10mm. You never saw a U.S. or European scope in 4 x 40.