Why are binoculars are filled with nitrogen? Is it harmful?

Why are binoculars are filled with nitrogen

Binoculars are a handy tool for birdwatchers and other enthusiasts. But did you know that they’re filled with nitrogen to prevent them from fogging up? Nitrogen is a gas that has many uses in industry, but it’s most famous for its role in preventing glasses, watches, and other delicate equipment from fogging up. In fact, … Read more