Quote: I could get non-nitrogen binos with much higher magnification for almost half the price of nitrogen filled binos.
Quote:Magnification has nothing to do with quality and nitrogen only prevents fogging on the inside. However, if the bino is sealed well enough to hold the nitrogen IN, it is sealed well enough to keep the moisture OUT.
Just a thought.
12" DSH 8" f/4 Vega MakNewt
Quote:Okay, you bloody “chemist here; in a lab for about 13 years,” you can consider that STOLEN for that book I’ve been whining about!!!More on “nitrogen”:The nitrogen is not there to pressurize the bino, as many suppose; it is there in case there should be any moisture left inside at the factory. Fungus can’t grow in an inert gas environment. [Sorry Tom, I can’t think of the real word I’m looking for and “inert” is what most people use anyway; help me out here.]BillC
Quote:I was looking for what it is REALLY classified as, but didn't have time to look it up.BillC
Quote:Quote:I was looking for what it is REALLY classified as, but didn't have time to look it up.BillC "Nobel gas"?
Quote:For the longivity of any binocular keeping it free of moisture is preferable to keeping it wet, irrespective of the claims and specs. However in a situation were the wet is unavoidable say search and rescue, coast guard and naval use then its worth noteing that they buy the very best available for that particular enviroment,DA.
Quote:Hi, I am newly subbed to Cloudy Nights. I already have a subject to ask about.I am interested in purchasing a new pair of binoculars. I am trying to decide between a pair of binoculars that are nitrogen filled (fog resistent) (for example, the Nikon Action Extreme 10x50) and non-nitrogen filled binoculars (For example the Orion 15x70). The main concern I have about the nitrogen filled feature is that I wonder if the nitrogen can be discharged by impact (while in luggage that has been handled roughly for example) or gradually leak over time. I think of vacuum aluminum thermos bottles that never keep their pressure. I could get non-nitrogen binos with much higher magnification for almost half the price of nitrogen filled binos. Thank you for your time on this subject.D.
Scott my scopes: a few refractors (50-102mm), 2 Newts (4.5-12"), and an 8" SCT
Quote:Not really related but Nitrogen is used in the aircraft industry, when I was in the RAF we used it in the hydraulic accumulators as their was no chance of detonation, also used in aircraft tires,in this case it kept its pressure fairly stable even going from the extremes of a hot aircraft pan in the blazing sun to freezing altitudes of over 55,000 ft, in the event of a tire or brake fire the released gas would not support combustion. If memory is correct the mainwheel tires on the English Electric Lightning were inflated to around 325-350 psi, sorry for going off topic,DA.
Quote:Somebody said that these binos are rugged and another mentioned that military uses them, though he says he regurly disposes of them. If these binos can survive military use, they can withstand heavy use.D.
Quote:I believe car use is related to the low pressure sensors that a lot of manufactures are fitting, nitrogen will not expand and contract like normal compressed air in tempreture variations and it probably helps with condensation internaly,also its used in a lot of binos to prevent fogging as the O.P. mentioned,DA.
MarkLeica 8x20; Nikon Action 7x35; Vixen Apex Pro 8x42; Orion 15x63; Docter Nobilem 15x60WO Megrez II 80 FD / APM 107mm f/6.5 / Mewlon 210 on DM-6 + Berlebach Planet
"The heavens declare the glory of God"...
Quote:Excuse my uneducated question bierbelly but what exactly is the BS meaning in your reply?, if its Bull Manure then its not exactly a nice responce,however all gasses expand and contract to some degree, however nitrogen is a more stable medium,DA.
Quote:Well, what is true is that nitrogen will contract and expand much less than moist air where condensation of the moisture is something not taken into account in the Ideal Gas Law you quoted.
Quote:Methane molecules are huge! Every time I fill a room with methene, it tends to linger.
Quote:The difference is if you have liquid water at one temperature and then gaseous water at a second temperature.
Quote:Quote:The difference is if you have liquid water at one temperature and then gaseous water at a second temperature.That was exactly my point.