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 Post subject: Are laser sights affected by temperature? Read comment below
PostPosted: Wed Oct 19, 2011 12:12 pm 

Joined: Sat Sep 24, 2011 10:57 am
Posts: 4
I was thinking of buying a green laser sight for my SIG556 to mount on the lower rail. Then I spotted this comment on the one I was thinking of buying on Amazon.com and got to wondering if it applies to all lasers.

"The last page of the manual states that the unit may not operate properly at temperatures below 54 degrees or above 95 degrees Fahrenheit. Nearly all our hunting is done in ambient temperatures that may range from 40 degrees down to zero (at night, of course) -- typical of Indiana raccoon seasons."

If temperature DOES affect the performance, can anyone explain how or what the affect is?


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 Post subject: Re: Are laser sights affected by temperature? Read comment b
PostPosted: Wed Oct 19, 2011 12:14 pm 
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Joined: Thu Jul 31, 2008 7:07 am
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Location: Rainbow Bridge, Kazakhstan
It affects whether or not they work at all, if the temp is too low, they do not work.

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 Post subject: Re: Are laser sights affected by temperature? Read comment b
PostPosted: Thu Oct 20, 2011 2:06 pm 

Joined: Sat Sep 24, 2011 10:57 am
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SkyPup wrote:
It affects whether or not they work at all, if the temp is too low, they do not work.


Is that 55 degree low temperature accurate for all lasers, then? Can't imagine how they could be considered useful if they don't work at all in cooler temperatures.


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 Post subject: Re: Are laser sights affected by temperature? Read comment b
PostPosted: Thu Oct 20, 2011 3:02 pm 
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Location: Rainbow Bridge, Kazakhstan
Depends on the what wavelength the laser operates on.

Green lasers are the most sensitive to low temperature operation, red lasers are much better at low temps. Some electronic circuits can be modified at great expense to operate at lower temperatures, however then they draw more power as well, it is a simple matter of physics....

Green 532nm lasers operate using a diode which is actually an infrared one shining through a set of crystals. These crystals operate less efficiently at high or low temperatures.
Think of it as an enzyme in a human - at low temperatures it works slowly and can almost stop, at high temperatures it dies, the enzyme only operates efficiently at normal body temperature of 98*F....

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 Post subject: Re: Are laser sights affected by temperature? Read comment b
PostPosted: Fri Oct 21, 2011 11:08 am 

Joined: Mon Apr 12, 2010 3:51 pm
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Location: Florida
I have the Laser Genetics ND3X50 SubZero which I use for night hunting and spotting. It is a laser, but it is collimated to make the beam much broader. In essence, it's like having night vision wherever I point the laser. At it's tightest collimation, the beam is about 2-1/2" diameter at about 3 feet from the light. The further away from the light obviously, the larger the beam area. I have used it to see things as far as 650 yards with no problem. Probably not exactly what you are looking for since this is not a laser pointer/aiming device, but the technology within is EXACTLY the same sans the collimator.

They sell a standard version, and the SubZero version, which I purchased. Apparently, the SubZero is insulated and is supposed to work better in temps below 45 degrees. I have put it in the refrigerator for several hours, pulled it out, and it does work. So in answer to your question, if a green laser is properly insulated, it can work (although it may have reduced efficiency) at temperatures below 50 degrees.

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SIG Sauer GmbH is the German representative of Switzerland-based manufacturing firm Swiss Arms AG, which was spun off from Schweizerische Industrie Gesellschaft (SIG) in 2000. SIG Sauer Inc was established in 1985 with the name SIGARMS (until October 2007) to import and distribute SIG firearms into the United States, although it now also has some manufacturing capabilities. Since 2000 it has been a separate entity. The origins of the original SIG company lies in the Swiss Wagon Factory created in 1853 by Friedrich Peyer im Hof, Heinrich Moser and Conrad Neher. After winning a competition put on by Switzerland's Federal Ministry of Defense, a contract to produce 30,000 muskets was awarded. They changed their name to Schweizerische Industrie Gesellschaft (SIG), German for "Swiss Industrial Company". In the 1970s, SIG began work on designing a handgun that would balance price with quality. Swiss law limits the ability of Swiss companies to manufacture arms and Swiss companies who wish to do this have to do so by using a foreign partner. In the case of SIG they chose the German firm of Sauer & Sohn. The SIG Sauer line of handguns began in 1975 with the SIG Sauer SIG P220. Prior to World War II, Sauer had been primarily a maker of shotguns and hunting rifles. During the war, they produced a handgun, the Sauer 38H, but afterwards had retreated from this market. With SIG as their partner/owner, Sauer returned to the business of manufacturing handguns. SIG also produced a machine gun, the MG 710 which was a general purpose machine gun chambered in 7.62x51mm NATO and based on the German MG42. It also used roller-delayed blowback as used in the CETME/G3/SIG 510 rifles and sometimes had a muzzle capable of launching rifle grenades. However, the MG 710 had a high price so the weapon was only exported to Bolivia.In 1985, SIGARMS Inc. was created as the American branch of SIG in Tysons Corner, Virginia to import the P220 and P230. In 1987 SIGARMS moved to Herndon, Virginia, and in 1990 moved to Exeter, New Hampshire to accommodate new manufacturing. SIGARMS, and its European sister companies, Sauer & Sohn, Blaser, Mauser Jagdwaffen GmbH and Swiss Arms were bought by Michael L√ľke and Thomas Ortmeier in October, 2000. On October 1, 2007 SIGARMS officially changed their name to SIG Sauer Inc. Today, SIG Sauer is the largest of the five companies and one of the largest firearms manufacturing entities in the world. It is also the fastest growing firearms maker in the United States, expanding its operations and increasing sales nearly 50% since 2005.[citation needed] SIG Sauer has recently tripled its work force and invested eighteen million dollars into state-of-the-art manufacturing facilities and equipment. According to SIG Sauer, one-third of U.S. police use SIG firearms. In the U.S. SIG Sauer also operates a firearms training school, the SIG Sauer Academy, in Epping, New Hampshire.Hunting is a sport which a human 'hunts' any living thing, but usually wildlife for food, recreation, or trade. In present-day use, the term refers to lawful hunting, as distinguished from poaching, which is the killing, trapping or capture of the hunted species contrary to applicable law. The species which are hunted are referred to as game, and are usually mammals and migratory or non-migratory gamebirds.A shooting sport is a competitive sport involving tests of proficiency (accuracy and speed) using various types of guns such as firearms and airguns (see archery for more information on shooting sports that make use of bows and arrows). Hunting is also a shooting sport, and indeed shooting live pigeons was an Olympic event (albeit only once, in 1900). The shooting sports are categorized by the type of firearm or target used.