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Message: <blockquote data-quote="Kevin Purcell" data-source="post: 1387820" data-attributes="member: 68323">That'll never be the case, Steve. Vapor depositing a metal mirror (usually a few different layers to attach it to the mirror and protect that back surface of the metal) but all the metal goes on in one go is a lot easier than depositing multiple layers (more than an AR coating) of varying thickness of multiple (three or more) different metal oxides (which need to be sputtered rather than evaporated).The trick is reducing the cost and keeping the quality high as small mistakes have large effects in the image (missing or enhancing a band of color).I think all of these reasons are why we don't see them in the Chinese EDs. Yet.Does anyone know of a Chinese made roof prism with a dielectric coating? I presume these Monarch are to be made in China ... is the mirror coating applied to the roof prism done in China too? Or do they import that part from Japan?</blockquote>