All about fog proof binoculars
Written by Lora Davis
If you have been unfortunate enough, there are chances that you could have owned a pair of binoculars that gave you some trouble with fog or you could be using one even now. Some of those low grade binoculars that fog up immediately you step out of your air conditioned car or warm patio to get a good view of some birds you are watching. The trouble with such binoculars is that no matter how many times you try wiping the outer lens nothing improves; in most cases you are forced to lose precious moments as you wait for the optics to clear up, something that is not pleasant since those birds won’t wait for you.
When a pair of binoculars is subjected to a quick and drastic change of temperature; the medium to high humidity levels will cause condensation internally as a result of the moisture on the outside getting into the binoculars; this is normally caused by an air leak. Condensation will also occur when you try to watch birds from inside your air conditioned car especially on a hot day. As soon as the widow is rolled open and your cooled binoculars are taken out, you can be sure that fogging will not allow you to continue enjoying viewing wildlife or those birds. When such conditions are humid and warm enough, there are chances that molds could actually grow between that optics making your binoculars useless.
The good news is that you no longer have to endure this trouble because there are advances regarding the interior of binoculars. Some high quality binoculars in the market today are purged with argon gas and nitrogen and after they are sealed tightly, they will effectively keep moisture away from finding its way inside the barrels as well as getting between the optics. The science of purging binoculars with gas and keeping it safe from internal condensation is not too hard to understand. During the manufacturing process, they remove oxygen from in between the optics and they replace it with argon gas or nitrogen; these two gases are inert and will not easily react with any other elements and this is what actually keeps condensations and fog away.
Nitrogen purging of binoculars is an affordable method of dealing with this problem and it offers adequate protection against fogging. Argon purging, on the other hand, is the more expensive method and what’s more, it also provides one of the highest qualities of waterproofing and fog-proofing for binoculars. When you want to enjoy the best bird watching and sports viewing without any such interruptions, you need to avoid choosing low quality binoculars that are not fog-proofed.
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