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Thread: Currently struggling with condensation on my 32mm 2" eyepeice in winter. Any ideas?

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    Question Currently struggling with condensation on my 32mm 2" eyepeice in winter. Any ideas?



    I thought about using a mini heating band for my eyepiece. is this a good idea or not? Let me know please.

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    Default Re: Currently struggling with condensation on my 32mm 2" eyepeice in winter. Any idea

    While I've never used one myself, I do know that there are different commercially available 'dew heaters' bands made in sizes specifically for EP's. From what I've read they seem to work fairly well.
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    Default Re: Currently struggling with condensation on my 32mm 2" eyepeice in winter. Any idea

    You can get these 12 volt auto defogged Heaters On Ebay Very cheap. They work well and they can plug right into a power box or cigarette lighter port.
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    Default Re: Currently struggling with condensation on my 32mm 2" eyepeice in winter. Any idea

    When are you taking the eyepiece out?

    I learned the hard way early on when I would set my eyepieces out in the eyepiece tray on the scope. By the time I allowed the scope to acclimate, so did the eyepieces, and just by putting my warm face near the glass, they'd fog over.

    After that, if dew was going to be a factor or it was a cold night, the eyepieces stayed inside until I was ready for observing.

    Dew strips/heaters suggested above by Frankie and Wire are ultimately the best mitigation, but until you can get something like that, you might try keeping a chemical hand warmer in your closed eyepiece case to keep the temperature above ambient inside. You can then swap out for a "warm" eyepiece and let the 32mm have a rest for a bit.

    I've been known to carry a few eyepieces back inside for a quick treatment with my wife's hairdryer on low. That keeps you going for a little while.

    And when the eyepiece doesn't have an eyeball hovering over it, keep the dust caps on. I swap eyepieces several times per object, and when I remove one, the top dust cap goes back on it unless it is a dry dew-free night.

    I've also repurposed the soft case that came with my ST80. A piece of stiff packing foam from a computer box (in the trash at work) with 2" and 1.25" holes cut in it, makes for a fine eyepiece holder in the bag. I can keep the case closed and the eyepieces dew free, yet still have easy access for swaps. A hand warmer tossed in there would do in a pinch.

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    Default Re: Currently struggling with condensation on my 32mm 2" eyepeice in winter. Any idea

    Small disposable chemical handwarmer. Hold it on with a rubberband. You could also keep a larger one in your pocket.

    The ones I buy are supposedly biodegradable, eco-friendly and all that. And there are no electronics to jinx up.
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    Default Re: Currently struggling with condensation on my 32mm 2" eyepeice in winter. Any idea

    Quote Originally Posted by jcj380 View Post
    Small disposable chemical handwarmer. Hold it on with a rubberband. You could also keep a larger one in your pocket.

    The ones I buy are supposedly biodegradable, eco-friendly and all that. And there are no electronics to jinx up.
    I do the same thing. At two pack is only $.78.
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    Default Re: Currently struggling with condensation on my 32mm 2" eyepeice in winter. Any idea

    I'm in the land of ice, snow and bitter cold. Temps here have been at January levels since early November, and I just haven't had a problem observing down to 6 above zero F. I limit myself to a half hour and keep my eyepieces in my parka pocket. The chemical heaters seem like a good idea though. I put out houses for stray cats and have over 110 of the 18 hour heaters for use in the houses. I'll give one a try if I decide to stay out an hour or so. My plan for this winter is to pick one or two targets, in advance, and just go for them. I'd like to get out 200 nights, for my 1st year, and I'm at 151. I have until March 17th to do it, so I have go out during the cold.

    Joe
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    Default Re: Currently struggling with condensation on my 32mm 2" eyepeice in winter. Any idea

    You can spit on them doing what divers do to keep the mask clear i would only do the outside not inside. Clear spit wipe with hand done. Or you can use a micro fiber towl or wait. Most hunters in the artic leave the rifle outside because the scope with freeze up its tempature difference

    Other option is the stuff you buy at a dive shop to put on a dive mask you could use that lasts a little longer then spit

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    Default Re: Currently struggling with condensation on my 32mm 2" eyepeice in winter. Any idea

    I second Bladekeeper’s suggestion of keeping the eyepieces put away until you use them. I haven’t experienced dew to the extent that warming the eyepiece in my hand for 30sec wouldn’t clear it up for 10min.
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    Default Re: Currently struggling with condensation on my 32mm 2" eyepeice in winter. Any idea

    Scope goes out first, eyepieces wait inside until I'm ready. I also wear an observing vest with pockets for eyepieces under my outercoat.

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