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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Spotting scope quality vs air temp
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<blockquote data-quote="CatShooter" data-source="post: 146244" data-attributes="member: 7"><p>GG... there is no formula for it.</p><p></p><p>Next time when you are out on a mirage prone day, take a black paper and some tape.</p><p></p><p>Cut a nickel sized hole in the middle of it and tape it to the front of the scope so you can lift it up to compare.</p><p></p><p>Look at a long range target that is in a boil.</p><p></p><p>Flip down the paper, and what you will see is a sharper target that is dancing.... nothing can make it stop moving, but the smaller opening will make it clearer.</p><p></p><p>What is actually happening is a long write, and will bore everyone to death... but a classic demonstration of mirage v aperture is the following - take the 80mm scope, and make a paper mask with four nickel sized holes at 12, 3, 6, and 9 o'clock, out by the edge, but still in the light path.</p><p></p><p>Take the scope out just after sunset and look west at a bright star - you will see 4 starts dancing independently around each other. That should throw some <strong><em>light</em></strong> on the subject. /ubbthreads/images/graemlins/wink.gif /ubbthreads/images/graemlins/wink.gif</p><p></p><p>.</p></blockquote><p></p>
[QUOTE="CatShooter, post: 146244, member: 7"] GG... there is no formula for it. Next time when you are out on a mirage prone day, take a black paper and some tape. Cut a nickel sized hole in the middle of it and tape it to the front of the scope so you can lift it up to compare. Look at a long range target that is in a boil. Flip down the paper, and what you will see is a sharper target that is dancing.... nothing can make it stop moving, but the smaller opening will make it clearer. What is actually happening is a long write, and will bore everyone to death... but a classic demonstration of mirage v aperture is the following - take the 80mm scope, and make a paper mask with four nickel sized holes at 12, 3, 6, and 9 o'clock, out by the edge, but still in the light path. Take the scope out just after sunset and look west at a bright star - you will see 4 starts dancing independently around each other. That should throw some [b][i]light[/i][/b] on the subject. [img]/ubbthreads/images/graemlins/wink.gif[/img] [img]/ubbthreads/images/graemlins/wink.gif[/img] . [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Spotting scope quality vs air temp
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