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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Help with a scope
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<blockquote data-quote="LouBoyd" data-source="post: 875980" data-attributes="member: 9253"><p>I'm not familiar with that tparticular model, but it sounds like a typical stadia rangefinder. </p><p> <a href="http://en.wikipedia.org/wiki/Stadiametric_rangefinding" target="_blank">Stadiametric rangefinding - Wikipedia, the free encyclopedia</a></p><p>Your scope appears to use a second focal plane reticle in conjunction with the scope's zoom to compute the distance. Like any stadia rangefinder it's as accurate as your ability to estimate a fixed height superimposed on the target. You need to determine what that height is if you don't have the instructions, but that's as simple as setting a yard (or meter) stick vertically at the distance of the markings ( yards or meters doesn't matter as long as you're consistent). The range doesn't have to be in the same units as the height estimate. Use units you're most familiar with. (yards or meter for range, feet or inches or centimeters for height. Pick a unit for range, one for height, determine what the calibration value is then stick with those units. </p><p></p><p>If you'd post a clear image of the reticle it would be easier to explain. Center the camera on the scope holding the lens of the camera about 3-1/2" behind the eyepiece. If the scope is aimed at a white sheet of paper illuminated by room lights it will be easiest.</p></blockquote><p></p>
[QUOTE="LouBoyd, post: 875980, member: 9253"] I'm not familiar with that tparticular model, but it sounds like a typical stadia rangefinder. [url=http://en.wikipedia.org/wiki/Stadiametric_rangefinding]Stadiametric rangefinding - Wikipedia, the free encyclopedia[/url] Your scope appears to use a second focal plane reticle in conjunction with the scope's zoom to compute the distance. Like any stadia rangefinder it's as accurate as your ability to estimate a fixed height superimposed on the target. You need to determine what that height is if you don't have the instructions, but that's as simple as setting a yard (or meter) stick vertically at the distance of the markings ( yards or meters doesn't matter as long as you're consistent). The range doesn't have to be in the same units as the height estimate. Use units you're most familiar with. (yards or meter for range, feet or inches or centimeters for height. Pick a unit for range, one for height, determine what the calibration value is then stick with those units. If you'd post a clear image of the reticle it would be easier to explain. Center the camera on the scope holding the lens of the camera about 3-1/2" behind the eyepiece. If the scope is aimed at a white sheet of paper illuminated by room lights it will be easiest. [/QUOTE]
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Help with a scope
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