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  1. Dominique B.

    Waterproofness and your use of binoculars

    That's wrong, it's true, the air density in the valley is greater, hence the higher ability to absorb more water. The oxygen saturation level is higher, always in relation to the temperature. Breathing on a mountain is therefore deeper in order to be able to absorb more air mass and more oxygen...
  2. Dominique B.

    Waterproofness and your use of binoculars

    why only in summer? The relative humidity that promotes mold in glass is 70% relative humidity and at temperatures between 10°C and 35°C. The absolute water content xg/m³ is crucial. You also have this condition in other weather conditions and air pressure conditions. For example, if it rains...
  3. Dominique B.

    Waterproofness and your use of binoculars

    There are situations in which the binoculars may need to be rinsed under water. Dusty areas, storms or long periods of observation at sea (salt water) may require cleaning under running water. Even visits to mountain stations where the density and temperature of the air changes can cause the...
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