Often, binoculars are described as weatherproof or water-resistant, rather than waterproof. Such models are typically sealed to withstand splashing water or moderate rain (JIS grade 4), heavy rain (JIS grade 5), or waves (JIS grade 6), but they may eventually leak if the bad weather is prolonged or extreme.
How do you clean waterproof binoculars?
If the binoculars are waterproof, gently run a light stream of water over the lenses to remove excess grime. Do not store binoculars until fully dry. Avoid using window or glass cleaner on the binoculars because these products often include chemicals that can damage the integrity of the lenses
What is a prism binocular?
Prism binoculars use convex lenses for both objective and eyepiece lenses and, incorporates an erecting prism that enables an inverted image to appear upright. There are two types of prisms with different shapes: roof prism and porro prism.