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
50 or 56 nightforce
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="Topshot" data-source="post: 463254" data-attributes="member: 13285"><p>SBruce,</p><p>Don't get confused between exit pupil size and total light transmission. The focus point of the scope may be only 2.55mm or 2.27mm on 22 power, depending on the objecctive lens size. But this is only a measurement of the diameter of that point of light. It does not tell you how much LUX is contained within that point of light.</p><p>A 56mm objective lens will have a larger focus point, but just as important, that focus point will contain much more light (LUX) that has been harvested by the larger lens.</p><p>This is a factor that not even a lot of scope salesmen understand.</p></blockquote><p></p>
[QUOTE="Topshot, post: 463254, member: 13285"] SBruce, Don't get confused between exit pupil size and total light transmission. The focus point of the scope may be only 2.55mm or 2.27mm on 22 power, depending on the objecctive lens size. But this is only a measurement of the diameter of that point of light. It does not tell you how much LUX is contained within that point of light. A 56mm objective lens will have a larger focus point, but just as important, that focus point will contain much more light (LUX) that has been harvested by the larger lens. This is a factor that not even a lot of scope salesmen understand. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
50 or 56 nightforce
Top