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Why Lens Coatings Are So Important –Shutterbug

These very thin (five millionths of an inch) coatings are certainly attractive, but are they utilitarian? After all, few lenses made before 1941 had ’em, and those optics worked just fine. Well, they didn’t work all that “fine.” Don’t sell coatings short. Without them, your lens collection would be small […]

Without coatings coming to the rescue to mitigate reflections at glass-air surfaces, modern lenses wouldn’t be practical. High-resolution, multielement optics would be a pipe dream for another universe. […] Coatings are more than cosmetic. They’ve made modern lenses possible.