To prevent external fogging you might look into applying some Rain-X, which repels most forms of condensation and moisture on glass. Contact the manufacturer though to make sure that the Rain-X application won't affect any external coatings that optimize light transmission. Good luck! Casey Tucker ________________________________ From: Ohio birds <[log in to unmask]> on behalf of Hayward Chappell <[log in to unmask]> Sent: Wednesday, July 27, 2016 11:39 AM To: [log in to unmask] Subject: [Ohio-birds] Binoculars fogging OK- probably dumb question, but I think I need clarification: I always thought "fog free" binoculars meant that the OUTSIDE of the lenses would not fog... so I bought Nikon Monarchs 7 which, like many other decent binocs state that they are fog free. However, when I take my binoculars out of my air conditioned house into this heat- they immediately fog up... so I thought that my binocular seals had been damaged and I need to send in for repair.... BUT I have been reading sites that state that "fog free" DOES NOT refer to outside of lens fogging up- is that true? If so- does everybody have this problem with outside of lens fogging up no matter how fancy binocs are and is there any way to fix it? Seems like hear a bird I want to see- run inside and get my binoculars and then run outside only to have them fog up and by time they clear- bird is gone. Woe is me Hayward Chappell Lawrence County -- Hayward Chappell 766 Private Rd. 3952 Willow Wood, OH 45696 ______________________________________________________________________ Ohio-birds mailing list, a service of the Ohio Ornithological Society. Please consider joining our Society, at www.ohiobirds.org/site/membership.php<http://www.ohiobirds.org/site/membership.php>. Our thanks to Miami University for hosting this mailing list. You can join or leave the list, or change your options, at: listserv.miamioh.edu/scripts/wa.exe?LIST=OHIO-BIRDS Send questions or comments about the list to: [log in to unmask] ______________________________________________________________________ Ohio-birds mailing list, a service of the Ohio Ornithological Society. Please consider joining our Society, at www.ohiobirds.org/site/membership.php. Our thanks to Miami University for hosting this mailing list. You can join or leave the list, or change your options, at: listserv.miamioh.edu/scripts/wa.exe?LIST=OHIO-BIRDS Send questions or comments about the list to: [log in to unmask]