Foggy Lenses

F

fxred

New member
Does anyone have any tricks to keep lenses from fogging up on the cold windless nights? I spent the majority of my time just trying to get a clear view versus hunting.
 
Walmart sells a product called "Cat Crap" defogger. It is in the Optical Dept.
It works very well. I use it if the humidity is high. If it is clear I just fan cold air on the lens with my hand when it starts to fog.
Holding the eyepiece a little farther from your eye will help prevent fogging. If your optic has a rubber eyepiece that can be folded back that will help with ventilation too.
 
My wife cleans our mirrors with pert shampoo in the bathroom, even after her lava hot showers the mirror stays clear. Have also read that other shampoos work
 
Originally Posted By: fxredDoes anyone have any tricks to keep lenses from fogging up on the cold windless nights? I spent the majority of my time just trying to get a clear view versus hunting.
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I don't get Fogging . I get a a settling of ( Night Dew 'air moisture' ) . When I do a stand and not moving and all my equipment is just still when calling and scanning . And It can be real bad at times around here at night especially if wind not blowing at all . It covers all glass and makes equipment dripping wet .

There is NOT much you can do about your PVs14 obj. lens but just occasionally wipe the sacrificial lens with a soft cloth .
As far as my rifle set-up with NV. Sight, day scope and IR supplements . I get set-up . turn everything ON . and adjust my focus and visually check everything is a go . I leave the Obj. cover flip-lid closed .
Then I have a fabric cloth cover I sewed, that lay's over the top of my rifle covering all from the IR to the back of my Ocular end . I catches all the sticking moist Dew moisture . As soon as I got something positive coming in. I just flip the Dew cover fabric off, and do my usual routine for the shot .
And use the Dew cover on both sitting shots and the Tripod shots .
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that's a great question. as a scuba diver we use anti-fog gel on our dive masks. this might solve the fogging issue. I will give it a try on the objective lens of my scope and monocular to see if it works.

hunting this weekend in 20 below zero temps was a challenge with ice forming on my eye-lashes. makes it hard to put the objective up to your eye. if I could just figure out how to stop this I would be good to go.
 
Originally Posted By: Shaun Simmathat's a great question. as a scuba diver we use anti-fog gel on our dive masks. this might solve the fogging issue. I will give it a try on the objective lens of my scope and monocular to see if it works.

hunting this weekend in 20 below zero temps was a challenge with ice forming on my eye-lashes. makes it hard to put the objective up to your eye. if I could just figure out how to stop this I would be good to go.



The anti fog gel that you use on a scuba mask has to be rinsed off with water. Probably not a good idea to use that on your NV equipment.
 
Originally Posted By: 1trkyhntrOriginally Posted By: Shaun Simmathat's a great question. as a scuba diver we use anti-fog gel on our dive masks. this might solve the fogging issue. I will give it a try on the objective lens of my scope and monocular to see if it works.

hunting this weekend in 20 below zero temps was a challenge with ice forming on my eye-lashes. makes it hard to put the objective up to your eye. if I could just figure out how to stop this I would be good to go.



The anti fog gel that you use on a scuba mask has to be rinsed off with water. Probably not a good idea to use that on your NV equipment.
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I have tried putting it over top of sacrificial lens of Obj. and Ocular before. And I never liked the results .

Have always been leery of putting/rubbing anything foreign like a anti-fog paste and liquid directly over the Obj. lens of any of NV I have owned . Always thought it was a Big NO for permanent surface spotting or messing up factory lens coating .
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edit add:
I keep same mindset as my high dollar day glass and treat the same.
I would Not rub and use anything foreign chem. liquids like anti-fogs and commercial class clearers on the glass . for my day glass, I just used a photography lens brush and irrigate with 90+ $ alcohol and gently wipe dry with soft lens grade cloths .
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I don't know what optic that you are using but I will add this from personal experience. Do not put ANYTHING on the demist shield of a PVS14. You will permanently destroy the factory coating.
Been there, done that.
 
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