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Message: <blockquote data-quote="Binastro" data-source="post: 3597513" data-attributes="member: 111403">Hi All.I talked with the boss.He thought it unlikely that UV radiation would affect AR coatings as they are inorganic normally.Although he could envisage a situation where atoms are excited and change.He lost me on the chemistry involved.This morning I received a very long analysis from the boss of bosses.Basically he says No.But any lubricant or paint that smells should never be anywhere near optics.A binocular in a hot window can cause so much internal damage as to render a binocular useless. It would need cleaning that might cost more than the binocularEven military binoculars must have no smelly lubricants or paints near them.Every optics shop window should be vacuumed daily. If not it could be death to optics if the window is Sun facing. England may be better than Texas. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />He has further sent a very long message to the boss of boss of bosses.I await the full analysis from THE AR coating MAN himself.All involved have a lifetime in these matters.My thoughts were that only the front and rear surfaces could be suspect as most glass absorbs UV, although there are simple lenses that can be used for near UV photography.What will we do when these oldtimers cannot answer questions?</blockquote>

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