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Long Range Hunting & Shooting
Quick scope question
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<blockquote data-quote="Wedgy" data-source="post: 1251825" data-attributes="member: 64108"><p>Mudd, I've read countless times the tube has no bearing on amount of light transmission, just windage & elevation. Correct or not I don't know, but I have read it again and again.</p><p>The bigger the objective(front lens nearest the muzzle) the more light collected. How much light making it to your eye depends on the power magnification of the scope(and the glass quality, assuming the same for comparison purposes). </p><p>The amount of light coming out of the scope is "exit pupil"</p><p>EP = objective divided by magnification power</p><p> </p><p>50mm objective at 10x = 5.0mm exit pupil </p><p> </p><p>40mm objective at 10x = 4.0mm exit pupil </p><p> </p><p>A 50mm objective will give 25% more light than a 40mm, given all else equal in the scopes. That's my understanding anyway.</p></blockquote><p></p>
[QUOTE="Wedgy, post: 1251825, member: 64108"] Mudd, I've read countless times the tube has no bearing on amount of light transmission, just windage & elevation. Correct or not I don't know, but I have read it again and again. The bigger the objective(front lens nearest the muzzle) the more light collected. How much light making it to your eye depends on the power magnification of the scope(and the glass quality, assuming the same for comparison purposes). The amount of light coming out of the scope is "exit pupil" EP = objective divided by magnification power 50mm objective at 10x = 5.0mm exit pupil 40mm objective at 10x = 4.0mm exit pupil A 50mm objective will give 25% more light than a 40mm, given all else equal in the scopes. That's my understanding anyway. [/QUOTE]
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