etc
Well-known member
I am confused. I keep hearing different viewpoints.
One is that the exit pupil size contributes to brightness, as in 7x42mm.
On the other hand, a 7x42mm for example has a lower twilight factor than a 8x42 or 10x42 and certainly less than 10x50. But a 10x50 has a 5mm exit pupil size which is smaller than 6mm of 7x42.
Not to mention that a 10x50 has more elements than a 7x42 or 7x, period.
So, what factors contribute to brightness, assuming that the coatings are the same in different configurations?
One is that the exit pupil size contributes to brightness, as in 7x42mm.
On the other hand, a 7x42mm for example has a lower twilight factor than a 8x42 or 10x42 and certainly less than 10x50. But a 10x50 has a 5mm exit pupil size which is smaller than 6mm of 7x42.
Not to mention that a 10x50 has more elements than a 7x42 or 7x, period.
So, what factors contribute to brightness, assuming that the coatings are the same in different configurations?