Re: Did I Make a Good Choice
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: AQC440</div><div class="ubbcode-body">"Wow, 15 minutes at both dusk and dawn from a pesky 6mm. Is that a scientific quote or a swag? Do you think if Vortex made a 56mm you get another 15 minutes? How about a 72mm objective like Zeiss/Hensoldt makes? Heck you should be able to hunt with that one till Midnight."
BobinNC, I know you are being facetious, that said most individuals cant utilize the light produced by a 56 mm scope let alone a 72. Although a larger, wider exit pupil can give you more area to look through, anything over a 5mm exit pupil ( as far as light is concerned ) is for most of us, a waste.
The human eye's pupil can open to 7mm, but it will only do so after about 30 minutes in near total darkness. If there is any ambient light at all the pupil will only open to about 5mm, making any excess light from a 5.6 or 7.2 exit pupil, useless…
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AQC440, The above information is partially true. The real benefit, in low light, is being able to utilize a higher magnification setting with the given maximum exit pupil. the 72mm mentioned has a 6mm exit pupil at 12x.
There are other benefits, such as increased resolution, but for the sake of this discussion (low light) this is the primary one. After all that is said, in application the big 72 does seem to have an edge over even our 56's at all magnification settings. It is one of those things that you really do have to see it to believe it.