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What exactly is WATERPROOF?

Printed From: OpticsTalk by SWFA, Inc.
Category: Other Optics
Forum Name: Binoculars
Forum Description: Anything that requires two eyes to look through it
Printed Date: December/13/2018 at 21:45

Topic: What exactly is WATERPROOF?
Posted By: Stephanie
Subject: What exactly is WATERPROOF?
Date 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..


"Always give people more than what they expect to get!"    Customer Service/Sales

Posted By: SteveSF
Date Posted: August/17/2005 at 14:28

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?

Posted By: Stephanie
Date Posted: August/17/2005 at 15:30
Sorry I left that out. This is how the U.S Military define waterproof.

"Always give people more than what they expect to get!"    Customer Service/Sales

Posted By: Sir Hoppalot
Date Posted: December/06/2012 at 02:25
They should just use an IP rating

"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

Posted By: STONE
Date Posted: December/06/2012 at 10:18

Posted By: Bird Watcher
Date Posted: December/06/2012 at 10:24 

Posted By: 3_tens
Date Posted: December/06/2012 at 10:54
Originally posted by Sir Hoppalot Sir Hoppalot wrote:

They should just use an IP rating
That may work for a plastic gun case but the scale is not appropriate for Optics. They all will fall inside the Maximum rating of 8. (The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. Normally, this will mean that the equipment is hermetically sealed. However, with certain types of equipment, it can mean that water can enter but only in such a manner that it produces no harmful effects.) A galvanized bucket can pass this rating.

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.

Posted By: gulf1263
Date Posted: December/07/2012 at 17:05
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 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.

Good day.

Posted By: rustic
Date Posted: December/07/2012 at 17:32
Keeps water from getting in.

Light is alright.<br /><br />The end is just... the beginning   -soul surfer

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