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Posted: 7/23/2013 4:01:48 AM EDT
I've got a TRS-25 red dot on my HD shotgun.......it makes it easier for me to shoot, I don't have to have my face all the way down touching the stock like I did with the factory bead sight, and it allows me to shoot with both eyes open. So far, I've never had a problem with it, and I thought it was a great optic for an HD shotgun.
Yesterday I caught a raccoon in my live trap on by my chicken coop, and I was too lazy to pull my .22 out of the safe to take care of it, so I pulled my 12ga out from under the bed and walked outside to the live trap. As soon as I went from the 75deg AC to the 90 degree outside with high humidity, the red dot (and the entire gun) got covered in condensation. The red dot was pretty much useless until it warmed up and reached the safe temp as the ambient air. Sure, I would wipe off the lenses with my shirt to clear it up a bit, but within seconds it was back to all fogged over. As soon as it fogged up, it was worthless. I can't think of many reasons why in a home defense situation you would go from inside to outside, but I found out that having a red dot optic on a firearm in that kind of situation makes the optic worthless. Just one more reason to stay with iron sights....simple, reliable, and they always work. |
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Could you at least still see the dot? Generally they can be used as an occluded Eye optic, you don't need to see all the way through it
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Would like to experiment with that, but it simply never gets that humid here in the desert.
I would have assumed any quality optic would have anti-fog coatings that would make such problems as you describe impossible, or at least greatly mitigate same. But I don't own your optic, all I have is an EOTech and an Aimpoint. Being military-grade, I presume they'd have anti-fog treatments but now I definitely want to find out! I think there's a corollary here, to the old saying about a map vs. a GPS: Just as a map with a bullet hole in it is still a map, iron sights with condensation on them are still iron sights. |
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Would like to experiment with that, but it simply never gets that humid here in the desert. I would have assumed any quality optic would have anti-fog coatings that would make such problems as you describe impossible, or at least greatly mitigate same. But I don't own your optic, all I have is an EOTech and an Aimpoint. Being military-grade, I presume they'd have anti-fog treatments but now I definitely want to find out! I think there's a corollary here, to the old saying about a map vs. a GPS: Just as a map with a bullet hole in it is still a map, iron sights with condensation on them are still iron sights. View Quote Set your AC to 68 and cover the air vent in the bathroom and jam a towel under the door. Turn your shower on full hot. Set rifle with Aimpoint or Eotech over an air vent. Wait 15 minutes, then introduce rifle to bathroom. Instant fog test. |
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This thread should be renamed "Another reason why to BUY A QUALITY red dot optic and why its a good idea"
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Guys it doesnt matter how expensive your site is, the cold glass is going to sweat if it is introduced into a hot humid environment. My $1000 Canon L lenses do this too.
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My T-1 fogged up nicely going from 72 degrees to 90. ETA: I didn't test to see if it was only external. I'm sure it was. View Quote View All Quotes View All Quotes Quoted:
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Buy a quality red dot like Aimpoint..... My T-1 fogged up nicely going from 72 degrees to 90. ETA: I didn't test to see if it was only external. I'm sure it was. Yes....that's what my trs-25 did.....only external fog. It's nitrogen filled, but that still doesn't prevent external fog. Like I said..... The entire gun was even wet. |
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WOW! Holy fucking shit balls!!!
Expensive optics manufacturers have actually found a way to suspend the laws of physics!?!?! Is it some kind of transdimensional warp bubble!??!??! Fucking bad ass!!!!! |
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Yes....that's what my trs-25 did.....only external fog. It's nitrogen filled, but that still doesn't prevent external fog. Like I said..... The entire gun was even wet. View Quote View All Quotes View All Quotes Quoted:
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Buy a quality red dot like Aimpoint..... My T-1 fogged up nicely going from 72 degrees to 90. ETA: I didn't test to see if it was only external. I'm sure it was. Yes....that's what my trs-25 did.....only external fog. It's nitrogen filled, but that still doesn't prevent external fog. Like I said..... The entire gun was even wet. I'm also interested in some sort of "solution" to this. I could still see the dot among the fog, but it wasn't exactly ideal. |
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My T-1 fogged up nicely going from 72 degrees to 90. ETA: I didn't test to see if it was only external. I'm sure it was. View Quote View All Quotes View All Quotes Quoted:
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Buy a quality red dot like Aimpoint..... My T-1 fogged up nicely going from 72 degrees to 90. ETA: I didn't test to see if it was only external. I'm sure it was. Quoted:
Yeah..... Aimpoints don't do that |
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Nothing wrong with a bushnell TRs-25. Good red dot for the money. I've never paid any attention to it fogging up but it's bright enough you'd have to paint the glass not to see the dot. I would expect a mod or site staff to know about bushnell red dots
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some kind of $ 100 chinese red dot Bushnell sells not sure price matters, it's the exterior that fogging althogh i have taken aimpoints out of my warm car in the winter and not seen that. my glasses do that sometimes View Quote View All Quotes View All Quotes Quoted:
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what kind of dot? not sure price matters, it's the exterior that fogging althogh i have taken aimpoints out of my warm car in the winter and not seen that. my glasses do that sometimes That's backwards. It shouldnt fog going from warm to cold. thats not how physics works. Did it fog when you brought it inside after being in the cold? |
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Buy a quality red dot like Aimpoint..... My T-1 fogged up nicely going from 72 degrees to 90. ETA: I didn't test to see if it was only external. I'm sure it was. Quoted:
Yeah..... Aimpoints don't do that Well there are two possibilities: 1. My Aimpoint is broken, fake, or somehow malfing. 2. Aimpoints also fog up if brought into high enough humidity. |
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If the glass is colder than the dewpoint, it WILL fog. Even the most expensive optic cannot violate thermodynamics. This is EXTERNAL fogging, internal fogging is something completely different.
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Well there are two possibilities: 1. My Aimpoint is broken, fake, or somehow malfing. 2. Aimpoints also fog up if brought into high enough humidity. View Quote View All Quotes View All Quotes Quoted:
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Buy a quality red dot like Aimpoint..... My T-1 fogged up nicely going from 72 degrees to 90. ETA: I didn't test to see if it was only external. I'm sure it was. Quoted:
Yeah..... Aimpoints don't do that Well there are two possibilities: 1. My Aimpoint is broken, fake, or somehow malfing. 2. Aimpoints also fog up if brought into high enough humidity. Obviously number one. The fan boys have spoken! |
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This thread should be renamed "Another reason why to BUY A QUALITY red dot optic and why its a good idea" View Quote You guys keep say get an aim point..... But any optic transferred from 75 deg air to 90 deg air at 90% humidity will fog. I'm in the Midwest....not the desert. Like others have said....do the fog test in the bathroom with the shower going...,an aim point will get external fog. It's physics.... |
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You guys keep say get an aim point..... But any optic transferred from 75 deg air to 90 deg air at 90% humidity will fog. I'm in the Midwest....not the desert. Like others have said....do the fog test in the bathroom with the shower going...,an aim point will get external fog. It's physics.... View Quote View All Quotes View All Quotes Quoted:
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This thread should be renamed "Another reason why to BUY A QUALITY red dot optic and why its a good idea" You guys keep say get an aim point..... But any optic transferred from 75 deg air to 90 deg air at 90% humidity will fog. I'm in the Midwest....not the desert. Like others have said....do the fog test in the bathroom with the shower going...,an aim point will get external fog. It's physics.... How do those of us with extreme humidity guard against that? Any anti-fog treatment safe for lenses? I wouldn't mind the water beading off. |
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This is why QD mounts are important when shooting raccoons. View Quote Very true. I knew a guy who lost a shot on a trophy raccoon once because of a fogged optic. It was a real lesson for him...especially since it could have ended so badly if the animal had decided to attack instead of continuing to paw through the garbage. |
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Laser.
Or just point shoot, if you cant hit a moveing man sized target while moveing at 20-30 feet point shooting a shotgun or rifle from the shoulder, you got problems anyway. |
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If the glass is colder than the dewpoint, it WILL fog. Even the most expensive optic cannot violate thermodynamics. This is EXTERNAL fogging, internal fogging is something completely different. View Quote But, but, I paid $500 for my red dot! It doesn't have to obey your stupid laws! ETA: No, seriously, guys. Buying a more expensive optic will not solve this problem. |
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How do those of us with extreme humidity guard against that? Any anti-fog treatment safe for lenses? I wouldn't mind the water beading off. View Quote View All Quotes View All Quotes Quoted:
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This thread should be renamed "Another reason why to BUY A QUALITY red dot optic and why its a good idea" You guys keep say get an aim point..... But any optic transferred from 75 deg air to 90 deg air at 90% humidity will fog. I'm in the Midwest....not the desert. Like others have said....do the fog test in the bathroom with the shower going...,an aim point will get external fog. It's physics.... How do those of us with extreme humidity guard against that? Any anti-fog treatment safe for lenses? I wouldn't mind the water beading off. Don't use Air Conditioning and you won't have the problem. |
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I lost a deer many years ago this way. Very cold day. Deer was moving though the trees. I quick walked up a ridge to get a better view. I was breathing heavy. As I brought the rifle up I exhaled on the scope. I couldn't see the deer and the deer ran away to live another day. I'm going to have to get one of these Aimpoints now since they don't fog.
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Home remedy anti-fog:
Get yourself a Q-tip and a bar of soap. Dampen the Q-Tip. Rub it on the soap a little bit. Rub the soapy end of the Q-Tip on the optics' lens. Use the unsoapy end of the Q-Tip to wipe off excess soap, if any. The idea is to leave a thin transparent layer of soap on the lens. This works on bathroom mirrors and car rear view mirrors also. But for those you can use your finger and a paper towel instead of the Q-Tip. |
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Interesting topic. Link to eotech site covers it.
http://www.eotech-inc.com/product-faqs Just scroll down.
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Buy a quality red dot like Aimpoint..... This... My Aimpoint does NOT fog. If the temperature difference is big enough, and humidity is high enough...yes it will. It's physics. We are talking external fog.... Not internal. |
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Aimpoint COMP M2 First picture 68 degrees inside Second picture 85 degrees outside http://i96.photobucket.com/albums/l165/raypitre/9B9199E5-271D-45AA-8D39-864D6F5134B0-2666-00000395434CDA58_zpsb45c9f7a.jpg http://i96.photobucket.com/albums/l165/raypitre/B4DB4693-AF66-4623-B1E7-8187B7B64FF7-2666-00000395501D563B_zpsb65e88fe.jpg View Quote Can still see the dot and probably use it for what I'd need it for. Doesn't count! |
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If the temperature difference is big enough, and humidity is high enough...yes it will. It's physics. We are talking external fog.... Not internal. View Quote View All Quotes View All Quotes Quoted:
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Buy a quality red dot like Aimpoint..... This... My Aimpoint does NOT fog. If the temperature difference is big enough, and humidity is high enough...yes it will. It's physics. We are talking external fog.... Not internal. This every thing will fog. Hell when I take my bike from basement to to outside it is covered in dew. No high end anything can fix that. |
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It's not just temperature difference.... It's humidity. If the air is dry you will not have an issue....if its 90%+ humidity it's a different story.
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