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
Scope for a REM LTR 308
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="ScottBerish" data-source="post: 216832" data-attributes="member: 11933"><p>Mike,</p><p> </p><p>I understand about the human pupil opening up to about 7mm in near darkness, so the theory is that any exit pupil above 7mm is "wasted" on the enduser. I do not agree with that theory. While only up to 7mm of exit pupil is necessary before exceeding the size of the pupil, anything higher still provides a brighter sight picture. Conversely, IMHO, anything smaller than a 7mm exit pupil begins to limit the low light capability of the scope. The NF scope achieves a 7mm exit pupil at only 3.4x, so any magnification above that shrinks the exit pupil until each reaches its minimum of 2.4mm at 10x. This might be OK for daylight use, but would be quite limiting in low light. Given the intended hunting ranges of up to 700 yards, and using the rule of thumb of 1x for every 100 yards of range, the NF scope at 7x would have a 3.4mm exit pupil, OK for quality glass in daylight, but I would think it would be a handicap for low light use. This is why I suggested the 50mm. 40-42mm would be OK as a compromise. </p><p> </p><p>As to the fit of scope to rifle, I think the benefits of the larger scope for the intended purpose offset the aesthetic trade-off, but that is a personal choice.</p><p> </p><p>I'm sure the 2.5-10x24 is a dandy scope, but we'll have to agree to disagree it's the best scope for this situation.</p><p></p><p>Take care, my friend...</p><p> </p><p>Scott</p></blockquote><p></p>
[QUOTE="ScottBerish, post: 216832, member: 11933"] Mike, I understand about the human pupil opening up to about 7mm in near darkness, so the theory is that any exit pupil above 7mm is "wasted" on the enduser. I do not agree with that theory. While only up to 7mm of exit pupil is necessary before exceeding the size of the pupil, anything higher still provides a brighter sight picture. Conversely, IMHO, anything smaller than a 7mm exit pupil begins to limit the low light capability of the scope. The NF scope achieves a 7mm exit pupil at only 3.4x, so any magnification above that shrinks the exit pupil until each reaches its minimum of 2.4mm at 10x. This might be OK for daylight use, but would be quite limiting in low light. Given the intended hunting ranges of up to 700 yards, and using the rule of thumb of 1x for every 100 yards of range, the NF scope at 7x would have a 3.4mm exit pupil, OK for quality glass in daylight, but I would think it would be a handicap for low light use. This is why I suggested the 50mm. 40-42mm would be OK as a compromise. As to the fit of scope to rifle, I think the benefits of the larger scope for the intended purpose offset the aesthetic trade-off, but that is a personal choice. I'm sure the 2.5-10x24 is a dandy scope, but we'll have to agree to disagree it's the best scope for this situation. Take care, my friend... Scott [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Scope for a REM LTR 308
Top