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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
March 2-25? 42mm vs 52
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<blockquote data-quote="Wedgy" data-source="post: 1836226" data-attributes="member: 64108"><p>Human eye can open to ~7mm(less as we age) The light exiting the scope is a factor of the objective size divided by the power setting so 42mm divided by 6 power is 7mm which would be the max your eye could use. Any power above that is less than 7mm. At 20 power the exit pupil would be 42 divided by 20 = 2.1mm</p><p>The max light you could use from the 52mm objective would be 52mm divided by 7mm is at 7.2 power</p><p>At 20x the 52mm scope has a 2.6mm exit pupil.</p></blockquote><p></p>
[QUOTE="Wedgy, post: 1836226, member: 64108"] Human eye can open to ~7mm(less as we age) The light exiting the scope is a factor of the objective size divided by the power setting so 42mm divided by 6 power is 7mm which would be the max your eye could use. Any power above that is less than 7mm. At 20 power the exit pupil would be 42 divided by 20 = 2.1mm The max light you could use from the 52mm objective would be 52mm divided by 7mm is at 7.2 power At 20x the 52mm scope has a 2.6mm exit pupil. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
March 2-25? 42mm vs 52
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