Guide to Waterproof and Fogproof Binoculars
 A binocular is made waterproof and fogproof by filling (purging) the binocular with nitrogen. The waterproof binoculars not only protect against rain and leakage, they also protect the binoculars from fogging. Such binoculars are designed to resist repeated changes in temperature and humidity, making it impossible for condensation to damage internal parts of the instrument. The binoculars with waterproofing and Fogproofing features are a great gadget in high-humidity situations or when dew is heavy at dawn, this ensures a successful bird watching trip, boating, hunting, hiking, or other outdoor uses with your family when the rain hits.
Waterproofing and Fogproofing is achieved through the use of rubber O-rings and nitrogen gas purging. Although rubberized casing can help durability please ensure your binoculars are listed as waterproof. Consider looking for waterproof binoculars with rugged shells for use while boating or in other environments where a drop may be possible.
Waterproofed and fogproof binoculars are available both in regular sizes and in compact sizes for easy handling. There are compact size binoculars also available with these same features, for this you can take a look for binoculars with Roof prisms, which are often smaller. Always be sure to check the label carefully, as some binoculars will be listed as water-resistant, weather-resistant, or splash-proof. Although these types will have some protection against moisture, only binoculars listed as waterproof will be guaranteed against water damage.
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Binoculars Technical Guide |
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