Quote: the pupil cannot dilate beyond 7mm and loses that ability from abt 25
Opinions on this matter must have changed. Pecar's 4x81 had a 36mm objective lens presumably because it was thought the eye could sometimes use a 9mm exit pupil. Maybe it was made for myopes.
Any young hunters here should carry a small ruler when out pitching woo. Then, when you see a girl hot to trot, ask if you can measure her pupils in the name of science - unless you can think of something better to do.