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
Swaro vs Huskemaw
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="Gamesniper19" data-source="post: 2886935" data-attributes="member: 95013"><p>Fair....Rayleighs can be used in many physics applications but when we are discussing light, it is specific.</p><p></p><p>In the Rayleigh criterion equation, <strong>CD</strong> is the <strong>critical dimension</strong>, or smallest possible feature size, and<strong> λ</strong> is the <strong>wavelength</strong> of light used. (the optics ratio between CD, ocular and the amount of light transferred <strong>λ </strong>from the objective lens to it and into your eye objective lenses NA) <strong>NA</strong> is the <strong>numerical aperture</strong> of the optics, defining how much light they can collect.</p><p>Finally, <strong>k1</strong> (or the <strong>k1 factor</strong>) is a coefficient that depends on many factors related to the chip manufacturing process. The physical limit lithography. Smaller critical dimension can be achieved by using a combination of smaller light wavelength and larger numerical aperture (NA), while pushing k1 as close as possible to the physical limit.</p><p></p><p>This is why when with many scopes, as you turn up the power to max, it gets dark to your eye and sometimes loses clarity (114.3 is diminished in direct ratio = reductions go down as the power to aperture goes up so 114.3 may be reduced to 100 or 96 or 83 etc...)</p><p>In English LOL. The human eye can only resolve (see with full clarity and focus) a minute of angle at 100 yards as a constant. This is a measurement of the light required through any optics for the eye to perform at optimal levels (114.3). As the power goes up, the amount of light compressed goes up and compressed light is harder for the eye to see. More compression, less clarity.</p><p></p><p>Simplified example:</p><p>For scopes you divide 114.3 (Rayleigh's constant) by objective to find the highest power that an optic is usable.</p><p>So an spotter with an 80mm obj <strong>optimal</strong> magnification is 42x. It may be useable at 4 pm at 50 or 60 but once the amount of useable light is diminished, the ability for they eye to see is diminished.</p><p>114.3/80mm = 1.43 seconds,</p><p>then 60 seconds / 1.43 = 42x</p><p></p><p>Going beyond 42x only amplifies errors, affects clarity, enhances mirage, magnifies heartbeat, wind wiggle, etc...</p><p></p><p>This is part of why as you move up the ladder in more expensive, brighter, and larger scopes, they are more clear. Of course scope construction, lens material and overall coatings matter - Why sometimes with your Swaro you can see slightly better at low light with the optic than you can with your eye. But even that has its limits. From just a build perspective a 1 inch tube scope with a 40mm objective will not be as bright at 16 power as a 34mm tube and 56mm objective at 16 power.</p></blockquote><p></p>
[QUOTE="Gamesniper19, post: 2886935, member: 95013"] Fair....Rayleighs can be used in many physics applications but when we are discussing light, it is specific. In the Rayleigh criterion equation, [B]CD[/B] is the [B]critical dimension[/B], or smallest possible feature size, and[B] λ[/B] is the [B]wavelength[/B] of light used. (the optics ratio between CD, ocular and the amount of light transferred [B]λ [/B]from the objective lens to it and into your eye objective lenses NA) [B]NA[/B] is the [B]numerical aperture[/B] of the optics, defining how much light they can collect. Finally, [B]k1[/B] (or the [B]k1 factor[/B]) is a coefficient that depends on many factors related to the chip manufacturing process. The physical limit lithography. Smaller critical dimension can be achieved by using a combination of smaller light wavelength and larger numerical aperture (NA), while pushing k1 as close as possible to the physical limit. This is why when with many scopes, as you turn up the power to max, it gets dark to your eye and sometimes loses clarity (114.3 is diminished in direct ratio = reductions go down as the power to aperture goes up so 114.3 may be reduced to 100 or 96 or 83 etc...) In English LOL. The human eye can only resolve (see with full clarity and focus) a minute of angle at 100 yards as a constant. This is a measurement of the light required through any optics for the eye to perform at optimal levels (114.3). As the power goes up, the amount of light compressed goes up and compressed light is harder for the eye to see. More compression, less clarity. Simplified example: For scopes you divide 114.3 (Rayleigh's constant) by objective to find the highest power that an optic is usable. So an spotter with an 80mm obj [B]optimal[/B] magnification is 42x. It may be useable at 4 pm at 50 or 60 but once the amount of useable light is diminished, the ability for they eye to see is diminished. 114.3/80mm = 1.43 seconds, then 60 seconds / 1.43 = 42x Going beyond 42x only amplifies errors, affects clarity, enhances mirage, magnifies heartbeat, wind wiggle, etc... This is part of why as you move up the ladder in more expensive, brighter, and larger scopes, they are more clear. Of course scope construction, lens material and overall coatings matter - Why sometimes with your Swaro you can see slightly better at low light with the optic than you can with your eye. But even that has its limits. From just a build perspective a 1 inch tube scope with a 40mm objective will not be as bright at 16 power as a 34mm tube and 56mm objective at 16 power. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Swaro vs Huskemaw
Top