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I asked my optician about AR-coating watch-crystals...


a german in denmark

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do indulge my curiosity ... what's the difference, Chief ?

The coatings themselves are totally different and applied by different processes. The result with eyeglass coatings is typically a greenish color with much higher reflectivity and less durability. Most opticians will tell you to use special microfiber cloths whenever you clean the lens... With a truly durable coating, though, you can use spit and a T-shirt over and over and have no problems at all. But the reflectivity is what matters most, and eyeglass coatings don't perform.

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