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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
IOR SCOPES
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<blockquote data-quote="Jeff In TX" data-source="post: 157671" data-attributes="member: 1522"><p>[ QUOTE ]</p><p>[ QUOTE ]</p><p></p><p>First, scopes don't gather light, they transmit it, but we know what you were trying to say.</p><p></p><p>[/ QUOTE ]</p><p></p><p>Jeff,</p><p></p><p>The whole light transmitting thing has never been adequately explained to me. The confusing part is that when I look with the naked eye things are pretty dim at dusk or so. While through a good scope, especially on low power, things are definitely brighter.</p><p></p><p>Back in the "old days" everyone including dealers etc. called it 'amplification'.</p><p></p><p>Maybe its just transmitting/concentrating 44 mm (or objective lens size) of light down to what down to what goes into the eye?</p><p></p><p>I really don't know. </p><p></p><p>[/ QUOTE ]</p><p></p><p>Roy,</p><p></p><p>Your last statement is far too off. Without geeking out on this here goes.</p><p></p><p>The term light gathering scopes have been around for a long time. But the reality of the matter is scopes don't gather light. Glass by its nature reflects light, thus preventing all of the light available from entering and exiting the glass. Glass does not gather light, nor does it amplify or regenerate light, though it can bend light. It simply lets light pass through. Optic manufactures work very hard developing coatings for there lenses that will reflect back less of the available light source allowing more of the available light to be transmitted through the lenses. Coatings for optics are often designed to work with certain light spectrums. Rifle scopes coatings are no different.</p><p></p><p>Quality scope manufactures will coat all of there lenses to maximize light transmissions. They usually state there scopes have multi-coated lenses. There goal is to transmit the maximum available light. Cheaper scope manufactures will only coat the outer lenses thus saving money. </p><p></p><p>It would be impractical and cost prohibited developing a light amplifier for a rifle scope or binoculars. Not to mention the average sized scope couldn't hold the electronics' necessary for the optical amplifier. Fiber optics transmission lines use optical light amplifiers and regenerators. Optical amplifiers lessen the effects of light dispersion and attenuation. EDFA's (erbium doped fiber amplifiers) are one of the more common amplifiers for optical systems. These amplifiers are also designed for a certain light spectrum.</p><p></p><p>Hope that helps</p></blockquote><p></p>
[QUOTE="Jeff In TX, post: 157671, member: 1522"] [ QUOTE ] [ QUOTE ] First, scopes don't gather light, they transmit it, but we know what you were trying to say. [/ QUOTE ] Jeff, The whole light transmitting thing has never been adequately explained to me. The confusing part is that when I look with the naked eye things are pretty dim at dusk or so. While through a good scope, especially on low power, things are definitely brighter. Back in the "old days" everyone including dealers etc. called it 'amplification'. Maybe its just transmitting/concentrating 44 mm (or objective lens size) of light down to what down to what goes into the eye? I really don't know. [/ QUOTE ] Roy, Your last statement is far too off. Without geeking out on this here goes. The term light gathering scopes have been around for a long time. But the reality of the matter is scopes don’t gather light. Glass by its nature reflects light, thus preventing all of the light available from entering and exiting the glass. Glass does not gather light, nor does it amplify or regenerate light, though it can bend light. It simply lets light pass through. Optic manufactures work very hard developing coatings for there lenses that will reflect back less of the available light source allowing more of the available light to be transmitted through the lenses. Coatings for optics are often designed to work with certain light spectrums. Rifle scopes coatings are no different. Quality scope manufactures will coat all of there lenses to maximize light transmissions. They usually state there scopes have multi-coated lenses. There goal is to transmit the maximum available light. Cheaper scope manufactures will only coat the outer lenses thus saving money. It would be impractical and cost prohibited developing a light amplifier for a rifle scope or binoculars. Not to mention the average sized scope couldn’t hold the electronics’ necessary for the optical amplifier. Fiber optics transmission lines use optical light amplifiers and regenerators. Optical amplifiers lessen the effects of light dispersion and attenuation. EDFA’s (erbium doped fiber amplifiers) are one of the more common amplifiers for optical systems. These amplifiers are also designed for a certain light spectrum. Hope that helps [/QUOTE]
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