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40 MM objective vs 50 MM |
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gabby
Optics GrassHopper Joined: August/26/2005 Location: United States Status: Offline Points: 2 |
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Posted: August/26/2005 at 07:49 |
I will be buying a Luepold VX II on my new Rem model 700 classic
(.308) in the next few days. I hunt whitetails and hogs at this
time. At times I will hunt feral hogs at night here in south
Texas. Currently I have been using my old Model 70 with an
equally older Vari X II 3x9x40. It has been good to me, even
while hunting at night. I am just wondering if the bigger
objective will be worth $50 to me? I do place alot of importanxce
on low-light capability. IMO, the first and last period of legal
light is where the chances of success are most probable. Is there
an appreciable difference in the low-light performance between the two
scopes?
thx in advance gabby in San Antonio |
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Chris Farris
TEAM SWFA - Admin swfa.com Joined: October/01/2003 Location: Texas Status: Offline Points: 8024 |
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The short answer is no.
Here is why (the long boring answer);
Exit Pupil
The maximum the human eye can perceive is 7mm in total darkness. As you get older you pupil will only dilate to 6mm then 5mm.
The 3-9x40 and 3-9x50 will both transmit the exact same amount of light to your eye, IF you place them on the correct power.
First decide what power you need for what you are doing, then multiply that by 7 and the answer will be the size of objective lens you will need.
Basically, a 7mm exit pupil is a 7mm exit pupil regardless of the objective that helped produce it. All things being equal a 20mm scope set on 2.86x will be just as bright as a 56mm scope set on 8x.
When your pupil is constricted in the day time a scope with a large exit pupil is great for quick shots because the exit pupil is larger than your pupil and you can get a full picture faster.
A few related threads. Exit pupil & low light performance Resolution VS Light transmission
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gabby
Optics GrassHopper Joined: August/26/2005 Location: United States Status: Offline Points: 2 |
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TY for that in-depth description
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