I find it hard to believe that
It doesn't matter what brand or type of gun you have hold it 2" away is the absolute truth of all guns when my gun specifically says it has a range of like 1" to 18". Furthermore, when testing this theory with my temp gun I purchased at several different locations in my house, whether i held my gun 2" away or 20" away from the laser pointer made ABSOLUTELY NO DIFFERENCE AT ALL in the temperature reading.
So maybe there are different guns. Or maybe I am smoking something good? I dunno, but there sure doesn't seem to be much validity in this thread OP as the cheap gun I bought seems to break this supposedly "all encompassing rule" here. And as the gun I bought is one of the cheaper ones available on Amazon, I highly doubt it is anything abnormal or special.
Now one thing that
DOES matter it seems and makes a HUGE difference on the read out on my gun is if I try to point the laser through glass or even the mesh at the top. Then the readout seems to be highly erroneous and if I take the temp with the lid removed on my tank, the read out is much different and seems to be much more accurate.
If anyone needs proof that my gun shows little to no difference regardless of the distance it is from the laser point, please ask. I will make a YouTube video proving that there is really no difference at all whether I am 2" away from my laser pointer or 2 feet away.
By the way, here is the infrared temp gun I bought:
http://www.amazon.com/Accuracy-Non-Contact-Infared-Temperature-Range/dp/B009RUPQGW/ref=sr_1_2?ie=UTF8&qid=1386818373&sr=8-2&keywords=infrared+temp+gun... I am not trying to be argumentative here, but just saying that my first ever infrared gun sure seems to make
nonsense out of this thread, especially the part about
"it doesn't matter what infrared gun you have or what brand, blah blah" -
That is the part that I have a problem with myself.