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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Parallax vs Focus
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<blockquote data-quote="FTRshooter" data-source="post: 1836740" data-attributes="member: 112707"><p>The ONLY reason I brought up my forays into competitive shooting is because you made this comment:</p><p></p><p>In my view you were inferring that I my experience in managing riflescopes is simply not up to the level where it can influence critical results. So I wanted to squelch that line of thought immediately.</p><p></p><p>Now, let's talk a little bit about the variations induced by parallax error.</p><p>Here is a site that has a calculator that will help you understand what the implications are.</p><p></p><p>[URL unfurl="true"]https://www.lelandwest.com/parallax-error-calculator.cfm?Action=1&CFID=6993843&CFTOKEN=e6888cf217b99f01-DA57E378-DFC5-DB7F-08956F6CF04D31A1&jsessionid=84303a04d18b0ce869e35b1e395473364069[/URL]</p><p></p><p>So, let's say we are talking shooting a target at 1000 yards. (I use that, because it's what I do in a match at least once a month and have been doing that for 15+years.) My objective lens is 56mm. I don't have a fixed parallax setting, but let's say I muck up and the backlash of my scope places the setting at 900 yards and due to DOF, I don't notice it. Well, at 1000 yards, the error is .012MOA or 0.122 inches.</p><p></p><p>I'm not worried.</p></blockquote><p></p>
[QUOTE="FTRshooter, post: 1836740, member: 112707"] The ONLY reason I brought up my forays into competitive shooting is because you made this comment: In my view you were inferring that I my experience in managing riflescopes is simply not up to the level where it can influence critical results. So I wanted to squelch that line of thought immediately. Now, let's talk a little bit about the variations induced by parallax error. Here is a site that has a calculator that will help you understand what the implications are. [URL unfurl="true"]https://www.lelandwest.com/parallax-error-calculator.cfm?Action=1&CFID=6993843&CFTOKEN=e6888cf217b99f01-DA57E378-DFC5-DB7F-08956F6CF04D31A1&jsessionid=84303a04d18b0ce869e35b1e395473364069[/URL] So, let's say we are talking shooting a target at 1000 yards. (I use that, because it's what I do in a match at least once a month and have been doing that for 15+years.) My objective lens is 56mm. I don't have a fixed parallax setting, but let's say I muck up and the backlash of my scope places the setting at 900 yards and due to DOF, I don't notice it. Well, at 1000 yards, the error is .012MOA or 0.122 inches. I'm not worried. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Parallax vs Focus
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