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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
focal planes
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<blockquote data-quote="Code4" data-source="post: 535845" data-attributes="member: 26988"><p>It has been explained to me that early variable scopes used a 'worm gear' to shift magnification which ment the reticle moved in a corkscrew fashion as power went up or down. I don't know how it is done now.</p><p> </p><p>I believe even today German Zeiss scopes can only guarantee a max of 1/2" (The best in the industry) change of POI at 100 yards between max and minimum magnifications with their 2nd focal plane scopes.</p><p> </p><p>This is all 3rd hand.</p></blockquote><p></p>
[QUOTE="Code4, post: 535845, member: 26988"] It has been explained to me that early variable scopes used a 'worm gear' to shift magnification which ment the reticle moved in a corkscrew fashion as power went up or down. I don't know how it is done now. I believe even today German Zeiss scopes can only guarantee a max of 1/2" (The best in the industry) change of POI at 100 yards between max and minimum magnifications with their 2nd focal plane scopes. This is all 3rd hand. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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focal planes
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