tpcollins
Well-known member
Forgive me for asking on a binocular sub forum but I can always count on getting the correct answer here on optics questions.
I understand exit pupil and lens coatings that allow light transfer, but let's take two variable power rifle scopes for example. Scope A is a 2.5-10x40 and on 5x has an 8mm exit pupil and a FOV of 35' at 100 yards. Scope B is a 2-7x32 and on 4x has the same 8mm exit pupil but a narrower FOV of only 30' at 100 yards.
With all coatings being the same, would the 2.5-10 scope actually be brighter because of a larger FOV or would it be an illusion tricking the mind into just thinking it was brighter? Thanks.
I understand exit pupil and lens coatings that allow light transfer, but let's take two variable power rifle scopes for example. Scope A is a 2.5-10x40 and on 5x has an 8mm exit pupil and a FOV of 35' at 100 yards. Scope B is a 2-7x32 and on 4x has the same 8mm exit pupil but a narrower FOV of only 30' at 100 yards.
With all coatings being the same, would the 2.5-10 scope actually be brighter because of a larger FOV or would it be an illusion tricking the mind into just thinking it was brighter? Thanks.