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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Why the love for MOA?
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<blockquote data-quote="sscoyote" data-source="post: 543576" data-attributes="member: 1133"><p>Interesting info. Never knew that by simply screwing the eyepiece in to adjust focus the magnification itself changed--especially from 32-25x.</p><p></p><p>When it comes to companies not knowing about their own products i was often appauled at what some professionals didn't know. There was an article written by a police sniper instructor in a highly regarded publication about applying the plex reticle just like a mil-dot for rangefinding. The guy was trying to approximate the plex reticle subtension for rangefinding. He obviously didn't understand the fact that the mil-ranging formula was not specific to the std. mil-dot subtension and can be used with any subtension. Another company has a piece circulating that says u can't use the plex reticle to range a coyote-sized target-crazy stuff really.</p><p></p><p>Mike--U said that magnification is not linear to subtension in a SFP optic? I've alwasy assumed this to be so (assuming the power ring is correctly calibrated), although i've seen some deviation especially with Leupold power rings. I know my Nikon BM 6-18x mil-dot is correct, as i've measured it, and it is as caluclated at 18x where the dot to dot spacing becomes 66% of the 12x calibration (12/18x3.6=2.4 IPHY). I know some optics companies use a cam for changing magnification but i thought that was reflected on the power ring such that the linear relationship is maintained? This should be the case since many ballistics programs have this option in their menus including Exbal.</p></blockquote><p></p>
[QUOTE="sscoyote, post: 543576, member: 1133"] Interesting info. Never knew that by simply screwing the eyepiece in to adjust focus the magnification itself changed--especially from 32-25x. When it comes to companies not knowing about their own products i was often appauled at what some professionals didn't know. There was an article written by a police sniper instructor in a highly regarded publication about applying the plex reticle just like a mil-dot for rangefinding. The guy was trying to approximate the plex reticle subtension for rangefinding. He obviously didn't understand the fact that the mil-ranging formula was not specific to the std. mil-dot subtension and can be used with any subtension. Another company has a piece circulating that says u can't use the plex reticle to range a coyote-sized target-crazy stuff really. Mike--U said that magnification is not linear to subtension in a SFP optic? I've alwasy assumed this to be so (assuming the power ring is correctly calibrated), although i've seen some deviation especially with Leupold power rings. I know my Nikon BM 6-18x mil-dot is correct, as i've measured it, and it is as caluclated at 18x where the dot to dot spacing becomes 66% of the 12x calibration (12/18x3.6=2.4 IPHY). I know some optics companies use a cam for changing magnification but i thought that was reflected on the power ring such that the linear relationship is maintained? This should be the case since many ballistics programs have this option in their menus including Exbal. [/QUOTE]
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Long Range Scopes and Other Optics
Why the love for MOA?
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