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02-10-2015, 04:42 PM - 1 Like   #1
Pentaxian




Join Date: Oct 2011
Location: Savannah, GA
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So, this exists: fog eliminators

Stumbled across these, didn't know there was such a thing. Now you know too.

http://www.bhphotovideo.com/c/product/374564-REG/Nikon_8073_Fog_Eliminator_Cloths_3_Pack.html

02-10-2015, 05:01 PM   #2
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3-pack, reusable, only $4.95 and based on the user reviews they actually seem to work. Sounds great for these cold winter days or humid conditions.

I kind of doubt their effectiveness in hardcore sub-zero night sky photography though ...
02-10-2015, 05:46 PM   #3
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My wife got me a package when we were first dating and visited a butterfly garden in Niagara in December 2011, and my lenses fogged over completely for the first 10+ minutes of the visit. We went again in late November 2014, and I used them for the first time (which means they had been sitting unopened for about 3 years). It helped. It didn't completely prevent them from fogging up, but it helped.

That's a pretty extreme circumstance, though... going from bone dry, bitter cold into tropical rain forest conditions.
02-10-2015, 06:12 PM   #4
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QuoteOriginally posted by FantasticMrFox Quote
3-pack, reusable, only $4.95 and based on the user reviews they actually seem to work. Sounds great for these cold winter days or humid conditions.

I kind of doubt their effectiveness in hardcore sub-zero night sky photography though ...
For night photography attach a disposable hand warmer packet near the front element of your lens with a rubberband. It warms the lens to counteract radiative cooling. The packets are available at any ski, hunting, or camping shop.

There's also the high tech dew heater solution that can be found at a telescope shop. More expensive but reusable.

02-10-2015, 08:43 PM   #5
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Back when I did a fair amount of scuba diving, one would spit on the inside lens of the face mask and spread it around, then rinse in sea water. Mask never fogged going from cold water at 75 feet to warm surface water. But I wouldn't recommend spitting on a lens objective!
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