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I put it in the freezer for a test for 30 minutes and it fogged up and froze like a popsicle is that what it is supposed to do how do I check for fogging if not that way? Thanks
To be fog resistant it needs to be purged with either nitrogen or argon gas. If there is a leak and the gas escapes, it is now prone to fog. Does it say the scope is waterproof? To add to your freezer test, you could try submerging it in 2-3 inches of water and seeing if any gets inside. That would show if there is a leak... Otherwise give SWFA a call.
I guess I will call them Friday got the scope today after all the good reviews here and looks like it is not fog proof after all. I think it is very clear glass and like the ffp feature first scope for me on that. Will give SWFA chance to talk about it.
I just got this from Chris great response time I will find out the temp and get back with him. Wow, that is unheard of for that scope. Did it fog externally or internally? How long did it take for the fog to go away? Can you describe the temperature change in degrees that it went from? I’ll go test a sun shade now. We’ll take care of you so don’t worry.
I've got two of the 3-9X42 SS scopes and have used them straight from a warm truck to 14 degrees F and had no problems with fogging. Cold air will not hold as much moisture as warm air. If there is moisture inside an optic it can show up as fogging inside when taken into a cold space. A cold scope taken into a warmer space may get condensation on it just like a cold beer glass at the beach and it needs to be wiped down before returning to the cold.
Seriously though. We hear this all the time and it is a common misconception in regards to what "fogging" is.
Just about all scopes are purged with nitrogen or argon gas to keep them from fogging internally during normal temperature changes that a human would encounter in the field.
Extreme temperature changes will cause scopes to fog externally, some do it less if they have proprietary patented hydrophobic coatings on the lenses. Scopes with these coatings also recover more quickly to external fogging.
There are some products on the market that you can apply to your lens to cut down on this happening and they are really useful for binoculars that fog up from the heat of your eye socket.
If the scope freezer guy will e-mail or PM me I will send you a pile of these anti fog things if you promise to keep our scopes out of the freezer and or oven.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SWFA</div><div class="ubbcode-body">If the scope freezer guy will e-mail or PM me I will send you a pile of these anti fog things if you promise to keep our scopes out of the freezer and or oven. </div></div>
ROFL! I've never heard of a freezer/oven test before, but I would think external fogging as a result of such tests would be considered normal for such extreme temperature changes...
Put it in the freezer for 10 minutes and then took it out. Never put it in the oven. Mounted it this weekend and now I have to zero the scope. I just need a place close to Raleigh with a 200 yard range at least for a good zero. Nice scope.