Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Difference between SCHOTT HD glass and other HD glass??
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="coyotezapper" data-source="post: 1734725" data-attributes="member: 20438"><p>I am sure these next comments will rub some the wrong way but I have actually talked to optical engineers about this subject at Shot. </p><p></p><p>A large objective lens only advantage is in low light at higher magnifications meaning the exit pupil is larger and will allow the available amount of light to be used at a higher magnification. A smaller objective with the same lens coatings can still be used but it must be used at a lower magnification so the exit pupil size will allow the eye to pick up the available light. The human eye is the limiting factor here when it comes to exit pupil size. Light transmission is about lens coatings and not objective lens size. Objective lens are not funnels and do not gather light. There are a bunch of crappy scopes out there with big objectives that suck in low light. Its about lens coatings first. So if you want more magnification in low light get a scope with a larger objective.</p><p></p><p>LRO did a low light test a few months back on scopes they called tier one quality and it was interesting that the reviewer stated that one of the 50mm objective scopes was brighter than a 56mm and he was not sure why. Simple, the 50mm objective scope had better lens coatings. FWIW their comparison showed the swaro x5 to be the best low light scope but there were quite a few other scopes I would like to have seen in the competition.</p></blockquote><p></p>
[QUOTE="coyotezapper, post: 1734725, member: 20438"] I am sure these next comments will rub some the wrong way but I have actually talked to optical engineers about this subject at Shot. A large objective lens only advantage is in low light at higher magnifications meaning the exit pupil is larger and will allow the available amount of light to be used at a higher magnification. A smaller objective with the same lens coatings can still be used but it must be used at a lower magnification so the exit pupil size will allow the eye to pick up the available light. The human eye is the limiting factor here when it comes to exit pupil size. Light transmission is about lens coatings and not objective lens size. Objective lens are not funnels and do not gather light. There are a bunch of crappy scopes out there with big objectives that suck in low light. Its about lens coatings first. So if you want more magnification in low light get a scope with a larger objective. LRO did a low light test a few months back on scopes they called tier one quality and it was interesting that the reviewer stated that one of the 50mm objective scopes was brighter than a 56mm and he was not sure why. Simple, the 50mm objective scope had better lens coatings. FWIW their comparison showed the swaro x5 to be the best low light scope but there were quite a few other scopes I would like to have seen in the competition. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Difference between SCHOTT HD glass and other HD glass??
Top