Scope power differences question.

Eye relief may be different between the two scopes and the larger objective option will need to be mounted higher for clearance. Both variables affect setup on the rifle
 
No, the Human eye can only take in so much light , it can dilate to only about 7mm.
the exit pupil ( the width of the beam of light leaving the eye piece) is calculated by dividing the objective lens size by the magnification power.
However, if the human eye can only dilate to about 7mm, anything larger than that is a moot point.
Cat
Ah, ok… thx… I learned my one thing for today…

SRS
 
In 80's and 90's my side job was in money making photography, and still today one of my favourite hobbies.
Along these years I learned to appreciate a "good-better-best" glass quality.
In shooting sports almost two decades, and I was chasing the best glass my wallet or my mind could afford.
I bought and swapped like twenty scopes along these years, what I have today these are the ultimate keepers.

I have my preferences about the glass quality in scopes.
To make it short, basically...

Place an average size average printed business card on your target @ 100 meters/yards.
If you can read that card....keep the scope.

My standpoint with scopes - buy the best you can afford.
Buy higher magnification then what you think you would need today.
No mid level scopes at max magnification have a sharp glass clarity.
Even if you jump to Tier2 most of x40 or x50 power scopes have no clarity at full power, you need to reduce 10-15% to get a so-so sharp picture.

I have one higher level Tier2 - or lower entry level to Tier1 long range target scope in 10-50x60. I was researching it in EU for really long before I pulled my wallet.
With this scope I can see the W308 bullet holes in the target @ 300 in a dark rainy day (unless the rain completely soaked the black paper). I can see my groups @ 500 clearly in any average day.

Edit:
I would really like to try one of these next time. The

8-80x56​


https://www.longrangesupply.com/store4/index.php?route=product/category&path=174
 
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