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In Search of Older Glass for IR
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<blockquote data-quote="salukfan111" data-source="post: 489554" data-attributes="member: 39212"><p>I believe he gives out the specific thing (lens treatments and such) to avoid so you can figure it out for yourself. There is probably new glass that is ok and old glass that is not. My understanding of the differences between old and new lens is that new ones have more coatings, more elements, and are manufactured to hit price points (built cheaply). The IR problems probably come from a coating that is present on old and new lens.</p></blockquote><p></p>
[QUOTE="salukfan111, post: 489554, member: 39212"] I believe he gives out the specific thing (lens treatments and such) to avoid so you can figure it out for yourself. There is probably new glass that is ok and old glass that is not. My understanding of the differences between old and new lens is that new ones have more coatings, more elements, and are manufactured to hit price points (built cheaply). The IR problems probably come from a coating that is present on old and new lens. [/QUOTE]
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In Search of Older Glass for IR
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