My brother has had some problems lately with his binocular lenses getting fogged over from humidity. This is external; not internal fogging.

I think I read that some manufacturers now have a lens coating that won't fog over, and that there are disposable wipes that will prevent this happening, too.

Anyone know anything for sure?

There are cloth wipes we buy in ski shops for goggles and glasses,but I don't recall the name.
Edit: No fog cloth

Have you got a package, and does it say if this is safe for coated binocular lenses?

Yes, they are safe for all optics.The one I have,I believe, came with a pair of goggles,but I think they can be found in various sporting good stores.

Scuba shops sell anti fog drops for mask, should work on a scope.

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Hold my beer and watch this!

Best stuff they sell at REI is 'cat ****'.

interesting- didn't know we had an auto-censor. It starts with c, or check the website and look for anti-fog. It keeps ski goggles clear, should be more than adequate for a scope.

good luck,
b.

Yes, but ski goggles and dive masks are high impact plastic, I guess. Optical glass and potentially delicate coatings may be otherwise.

I susoect that ski goggles are fairly cheap to replace if something ruins them. A binocular may cost upwards of $1,000 to replace or repair.

I have had good luck cleaning lenses with baking soda. I have used it with success with eyeglasses and scopes. I lightly wet the lens and sprinkle a little baking soda on, gently rub it around on the lens with my finger, then wipe it off with a damp microfiber cloth. Use a dry microfiber to wipe dry.

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Corripe Cervisiam

You might try wiping the lens with a very small drop of dish washing liquid...just enough to coat the lens.

I'll probably run some of these posts past the customer service people at Zeiss USA, Leica, and Swarovski.

I have a feeling that some of these "solutions" are going to void warranties, at best.

Even the type of dishwashing liquid may matter. One manufacturer of nebulizer parts for asthma treatment units warns not to wash the mouthpiece parts in any dish soap containing lemon.

As you know, I worked heavy construction for 30 years. Go to your local welding shop and ask for the same anti fog used in welding helmets. It comes in a gel type paste in a bottle roughly the same size as a film canister.

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James L. "Jim" Rhiner