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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Side focus (parallax) help needed - Leupold 4.5-14
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<blockquote data-quote="Broz" data-source="post: 581855" data-attributes="member: 7503"><p>Here is something I wrote a long time ago for another forum. </p><p> </p><p>Hope this will help you to see the purpose of adjusting this correctly.</p><p> </p><p> </p><p>Parallax Adjustment Done Correctly </p><div style="margin-left: 20px"><strong><span style="font-size: 10px">Long ago I became confused when Leupold put "Focus" on the parallax Knob on the side of their "Long Range" scopes. I started looking into this and was amazed with what they were doing. In my mind, they may be coaxing a shooter to miss his point of aim. Let me explain. That little knob we find on the left side of a scope in not a focus to me. It is indeed a parallax adjustment. </span></strong></div> <div style="margin-left: 20px"><strong><span style="font-size: 10px"></span></strong></div> <div style="margin-left: 20px"><strong><span style="font-size: 10px">First we need to understand what Parallax is. Here is a link to an explanation, you may not have to read it all to understand what is going on. <a href="http://en.wikipedia.org/wiki/Parallax" target="_blank"><span style="color: #417394">http://en.wikipedia.org/wiki/Parallax</span></a></span></strong></div> <div style="margin-left: 20px"><strong><span style="font-size: 10px"></span></strong></div> <div style="margin-left: 20px"><strong><span style="font-size: 10px">Now I know for a fact that if I use the knob to focus to the sharpest image sometimes I stall have parallax. The way to check this is, put your rifle on sand bags and position the crosshairs on a small target. Set it up so the rifle will not move with out you holding it. Then carefully looking through the scope without touching the rifle move your head up and down and side to side. If your crosshairs are moving around on the target you are experiencing parallax. Now while doing this, slowly turn the parallax knob one way then the other until even though you are moving your head, the crosshairs are staying on point of aim. Notice that in some conditions or distances, this no parallax view might be slightly out of focus. Don't let the out of focus thing bother you as I am here to tell you this is where your rifle will shoot the tightest groups. Once you have played with this process a bit you will be able to do it from a prone or bench position with much less effort. It might only be 1 inch at 100 yards, but that is 5" at 500yards. Defiantly worth making this process a regular part of your set up for each target you engage.</span></strong></div> <div style="margin-left: 20px"><strong><span style="font-size: 10px"></span></strong></div> <div style="margin-left: 20px"><strong><span style="font-size: 10px">Jeff</span></strong> </div></blockquote><p></p>
[QUOTE="Broz, post: 581855, member: 7503"] Here is something I wrote a long time ago for another forum. Hope this will help you to see the purpose of adjusting this correctly. Parallax Adjustment Done Correctly [INDENT][B][SIZE=2]Long ago I became confused when Leupold put "Focus" on the parallax Knob on the side of their "Long Range" scopes. I started looking into this and was amazed with what they were doing. In my mind, they may be coaxing a shooter to miss his point of aim. Let me explain. That little knob we find on the left side of a scope in not a focus to me. It is indeed a parallax adjustment. First we need to understand what Parallax is. Here is a link to an explanation, you may not have to read it all to understand what is going on. [URL="http://en.wikipedia.org/wiki/Parallax"][COLOR=#417394]http://en.wikipedia.org/wiki/Parallax[/COLOR][/URL] Now I know for a fact that if I use the knob to focus to the sharpest image sometimes I stall have parallax. The way to check this is, put your rifle on sand bags and position the crosshairs on a small target. Set it up so the rifle will not move with out you holding it. Then carefully looking through the scope without touching the rifle move your head up and down and side to side. If your crosshairs are moving around on the target you are experiencing parallax. Now while doing this, slowly turn the parallax knob one way then the other until even though you are moving your head, the crosshairs are staying on point of aim. Notice that in some conditions or distances, this no parallax view might be slightly out of focus. Don't let the out of focus thing bother you as I am here to tell you this is where your rifle will shoot the tightest groups. Once you have played with this process a bit you will be able to do it from a prone or bench position with much less effort. It might only be 1 inch at 100 yards, but that is 5" at 500yards. Defiantly worth making this process a regular part of your set up for each target you engage. Jeff[/SIZE][/B] [/INDENT] [/QUOTE]
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Side focus (parallax) help needed - Leupold 4.5-14
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