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  Binoculars: Astronomy: Binoculars - LENS COATINGS
Posted on Monday, November 29 @ 02:24:46 CST by astronomy


A key difference in otherwise similar binoculars is the lens coating. Optical coatings give the lenses a blue, green, amber, or red tint. They improve image brightness and contrast, without affecting the color.

Low-cost models have only single-layer coatings, often on just the outside lenses. In better models, all optical surfaces are coated, and the best ones feature multi-layer coatings.

Some binoculars have rubber armor to cushion the optics against minor bumps. Premium models are often waterproof, which prevents dew and contaminants from seeping into the innards.




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