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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
40mm, 42mm, 44mm & 50mm Objective - Optical Question of the Year
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<blockquote data-quote="700" data-source="post: 19407" data-attributes="member: 674"><p>W</p><p></p><p>That is a strange proposition. If there is any truth in it, I would love to find out more.</p><p></p><p>Here is my understanding of the situation.</p><p></p><p>Glass lenses bend light. This is how they form focussed images. Light beams from the target fall on the objective lens of the scope. Consider that light beams from all parts of the target may fall on all parts of the front of lens. The lens and subsequent lenses bend each light beam from each part of the target so that they coinside to form a focused image at some point. In doing this the lenses act as an analog optical computer.</p><p></p><p>As the scope is processing light beams reflected from the target, the position of the sun is irrivelant in this matter.</p><p></p><p>The position of the sun during the day should have no optical effect on how the scope holds zero.</p><p></p><p>Could your observations be due to parallex error, wind, mirage or athmospheric conditions changing as the sun changes position. </p><p></p><p>Mirage could be a factor. This is where the air between the target and scope bend the light. I have no experience with shooting through mirage as we do not get much here in Ireland.</p><p></p><p>Does anybody have any info on this.</p><p></p><p>Rgds</p><p></p><p>700</p></blockquote><p></p>
[QUOTE="700, post: 19407, member: 674"] W That is a strange proposition. If there is any truth in it, I would love to find out more. Here is my understanding of the situation. Glass lenses bend light. This is how they form focussed images. Light beams from the target fall on the objective lens of the scope. Consider that light beams from all parts of the target may fall on all parts of the front of lens. The lens and subsequent lenses bend each light beam from each part of the target so that they coinside to form a focused image at some point. In doing this the lenses act as an analog optical computer. As the scope is processing light beams reflected from the target, the position of the sun is irrivelant in this matter. The position of the sun during the day should have no optical effect on how the scope holds zero. Could your observations be due to parallex error, wind, mirage or athmospheric conditions changing as the sun changes position. Mirage could be a factor. This is where the air between the target and scope bend the light. I have no experience with shooting through mirage as we do not get much here in Ireland. Does anybody have any info on this. Rgds 700 [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
40mm, 42mm, 44mm & 50mm Objective - Optical Question of the Year
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