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
Nightforce Zero Stops on 8-32?
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="CS T" data-source="post: 228172" data-attributes="member: 2585"><p>Here is some info for you.</p><p></p><p>The average size of a human's eye pupil at night is 7 mm and in daylight it is about 4mm on average. If the optic give you a 7mm of exit pupil and you are using it for day use more than half the light will not reach the retina. I have also noticed if you are getting too much light and you look away you see light spots were ever you look and the targets look washedout. On a lot of my scopes I use a light reducer so I do not get the light spots and the washout is not there.</p><p></p><p>Size of bell divided by magnification = exitpupil. Hare are some examples. </p><p>56/22x=2.54mm</p><p>56/5.5x=10.18mm</p><p>50/22x=2.27mm</p><p>50/5.5x=9.09mm</p><p>The sweet spots for the 56 and the 50mm at Night and Day use. </p><p>50/7.14x = 7mm night use and for day use 50/12.5x = 4mm</p><p>56/8x = 7mm night use and for day use 56/14x = 4mm</p><p>You are really not getting much advantage over the 50mm. I feel there is a bigger disadvantage and that is you have to go with tall rings 1.00" at the low to 1.25" were the 50mm you can do 0.885".</p><p></p><p>When you go to an 8-32x you can see why they go with the 56mm.</p><p></p><p>Mike @ CSGW</p></blockquote><p></p>
[QUOTE="CS T, post: 228172, member: 2585"] Here is some info for you. The average size of a human’s eye pupil at night is 7 mm and in daylight it is about 4mm on average. If the optic give you a 7mm of exit pupil and you are using it for day use more than half the light will not reach the retina. I have also noticed if you are getting too much light and you look away you see light spots were ever you look and the targets look washedout. On a lot of my scopes I use a light reducer so I do not get the light spots and the washout is not there. Size of bell divided by magnification = exitpupil. Hare are some examples. 56/22x=2.54mm 56/5.5x=10.18mm 50/22x=2.27mm 50/5.5x=9.09mm The sweet spots for the 56 and the 50mm at Night and Day use. 50/7.14x = 7mm night use and for day use 50/12.5x = 4mm 56/8x = 7mm night use and for day use 56/14x = 4mm You are really not getting much advantage over the 50mm. I feel there is a bigger disadvantage and that is you have to go with tall rings 1.00” at the low to 1.25” were the 50mm you can do 0.885”. When you go to an 8-32x you can see why they go with the 56mm. Mike @ CSGW [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Nightforce Zero Stops on 8-32?
Top