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What exactly is WATERPROOF? |
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Stephanie
Optics GrassHopper Optics Goddess Joined: February/13/2004 Location: Native Texan Status: Offline Points: 1502 |
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Posted: August/17/2005 at 13:42 |
What exactly is waterproof any ways???
Well to be accepted as waterproof, a binocular must be immersed in 2 meters of water for two weeks or so with absolutely no penetration into the housing. Water resistant, weatherproof and other terms do not mean waterproof. The rubber coating do not make binoculars waterproof. They make binoculars easier to hold and reduce the damage if dropped..
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SteveSF
Optics GrassHopper Joined: May/17/2005 Location: United States Status: Offline Points: 37 |
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Good to know the minimum standard. Thank you.
Where did this specification come from? Is it specific to binoculars, or does it apply to other instruments, too? |
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Stephanie
Optics GrassHopper Optics Goddess Joined: February/13/2004 Location: Native Texan Status: Offline Points: 1502 |
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Sorry I left that out. This is how the U.S Military define waterproof.
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Sir Hoppalot
Optics GrassHopper Joined: June/24/2012 Location: New Zealand Status: Offline Points: 31 |
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They should just use an IP rating
http://en.wikipedia.org/wiki/IP_Code#Code_breakdown |
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"I don't know what World War III will be fought with, but I know World War IV will be fought with sticks and stones." - Albert Einstein
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STONE
Optics GrassHopper Joined: November/14/2012 Location: Mn. Status: Offline Points: 13 |
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Bird Watcher
Optics Master Joined: August/30/2006 Status: Offline Points: 1523 |
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http://www.opticstalk.com/chris-farris-waterproof-ratings_topic17467.html
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3_tens
Optics Jedi Master Joined: January/08/2007 Location: Oklahoma Status: Offline Points: 7853 |
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Folks ain't got a sense of humor no more. They don't laugh they just get sore.
Need to follow the rules. Just hard to determine which set of rules to follow Now the rules have changed again. |
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gulf1263
Optics Apprentice Joined: June/15/2011 Location: Alaska Status: Offline Points: 212 |
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The Japanese manufacturers use a scale of 1 to 8, the higher the number the more sever the conditions the glass will remain waterproof.
The US military branches each have their own separate standards...ie. the Navy standard is different than the Army standard. As an example the Navy requires a glass to be submerged for two weeks at two meters in a combination of various chemicals, oil and water undergoing certain vibrations at certain frequencies in addition to with standing cold, heat, pressure and altitude testing. Not all items they purchase meet these sever requirements, for a while Fujinon was their primary supplier. Baker Marine in San Diego has a glass sourced that meets these requirements for durability. Most top end Japanese glass is a 7 on the scale they use. I had a pair of Nikon 7x50's that met the Navy standards but also had a special fungus treatment and re-purging capabilities for jungle warfare (they were stolen) that had been developed for USMC Force Recon, available for individual purchase but not official issue. Standard issue were Pentax 7x50's. Art |
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Good day.
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rustic
Optics Master Joined: September/30/2011 Status: Offline Points: 1461 |
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Keeps water from getting in.
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