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external lense fogging

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/24/2015 at 09:09
BigGameBalls View Drop Down
Optics Apprentice
Optics Apprentice


Joined: December/10/2010
Location: MN
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Points: 276
I'm wondering what makes a binocular more prone to external lense fogging ? I had a pair of Zeiss terra ed that I just returned because I wasn't impressed with them at all. They seemed like cheap junk to me and they fogged up super easily when I put them up to my eyes and it wasn't even overly cold on the hunt I was on. Do lense coatings matter or is it just a factor of eye relief and eye cup design?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/24/2015 at 09:11
JGRaider View Drop Down
Optics Master
Optics Master


Joined: February/06/2008
Status: Offline
Points: 1505
They all fog externally in certain atmospheric conditions IME.  Fog Zero helps a ton, as does Parker's Perfect.  Even the glass with a hydrophobic coating fogs, but not as bad. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/24/2015 at 09:51
supertool73 View Drop Down
Optics God
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Superstool

Joined: January/03/2008
Location: Utah
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Points: 10630
If it is very cold out, I try to keep my bino's inside my coat so they are closer to my body temp.  Helps a lot.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/24/2015 at 11:13
bugsNbows View Drop Down
Optics Jedi Master
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bowsNbugs

Joined: March/10/2008
Location: Florida
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Points: 9747
Also have used Parker's Perfect with some satisfaction.
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