Re: should i scope a ar10 with a Nightforce 50mm or 56
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sobrbiker883</div><div class="ubbcode-body">Who is they??
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"They" is an article I read reviewing multiple scopes in some magazine which I dont remember right now.
So you got me wondering and so after I checked NF website, the exit pupil on the 50mm is 9.1mm and the exit pupil on the 56mm is 10.2mm. crunching some numbers results in a little over a 10% increase in size of the exit pupil. It is my guess that the pupil size IS a direct correlation to the amount of light that is allowed to pass through. Numbers dont lie.
I dont know where you got 2+ from...
Of course if the corelation is not linear, which I could not tell you, then this is not the case. I DO know that a larger pupil = more light, I am just not sure of the correlation (linear, exponential, sinusoidal, etc)
Given these numbers are at the lowest power setting (5.5x)
At 22x, its closer to a 5% difference.
So, again, if ur not shooting in low light conditions, and also want a lower mounted scope, I would go with the 50mm.
I have the 56mm mainly cause I do a lot of coyote and varmit calling, and dusk/dawn is when I do the majority of my work. That being said, I would be hard pressed to actually be able tell a difference..