In this video I experiment to get an understanding of how POI can be affected by subjecting an optic to extreme temperatures.
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is aimpoint offering a buy back Ha
I think the regression analysis of hot to cold was the most telling of all the data. Thanks for taking the time to make and post this video.
TO ALL AIMPOINT FANS BUTTHURT ABOUT THIS VIDEO: all optics are going to have their zeroes shifted by temperature that's why you should rezero for big temperature changes. that's basic science/chemistry. the molecules in metal shrink and expand due to temperature and that will cause a change in zero settle down you butthurt aimpoint fanboys all optics will act like this it doesn't mean your optics are bad it just mean they follow the basic laws of science
Very good analysis
It is interesting that DoD "discovered" the problem as we were making cuts in defense spending. That said we may never know the truth since Eotech is not talking, and Lvl3 Comm is a soulless conglomerate.
this is the worst test imaginable for this. youre taking the optic off the fucking rifle and then remounting it t test for POI shift? gee did you even consider where the POI shift might stem from in terms of COOLING the optic, removing it from the rifle, remounting it. youre a fucking moron
Keep the optic on the rifle and try again.
Cool test, this has been documented before and thermal drift will affect ANY holographic or red dot sight out there.
People need to stop acting like EoTechs are junk just because their issues are better documented.
How much POI drift is from constantly removing and replacing the optic?
Aimpoint considers its T1 better than the H1. I wonder if the T1 or the Compm4s can outdo the H1 and Pro.
Great test , I own many Aimpoint , eotechs and trijicon acogs , I love all of them ,, when any object is pushed to the threshold of which it's not intended you have to exspect a different result, anything is possible and if I find myself in a extreme weather condition, then il make the proper adjustments.. great test ..
I don't care what people say I had a aimpoint but I love my eotech not matter what eotech is for me #1
Awesome test man. Good work covering variables and keeping things objective. We need more tests with this level of attention and neutrality. I am sure many fanboys are going to be butthurt to discover that all optics will display some degree of fluctuation in the physical properties of materials that make up the optic. Keep it up!
I wonder what Eotech thinks about thier optics now? Bet they regret rolling over so quickly to the thernal drift pressure.
To be completely honest, I think thermal drift is an issue with any projected reticle optic. Electronics always have/will be effected by extreme hot/cold stimulus.
The question is, how often would an optic be exposed to these extreme temperatures?
Not very often.
Good video and good information. I am a test engineer for high precision navigation systems and we subject them to temp extremes (-65F to 160F) to check operation and to access errors. I will tell you that everything shifts over temp I don't care how good it is (our products cost up to $1M). Without breaking the bank I think you did a great job of coming up with a rough estimate of shifts over temp for this site. Thanks for the work it is helping me to decided what to do with my EOTechs.
Thanks for this video. I have the EoTech 512 and just learned about the issues. I have not yet had an issue with mine and where I live, it never get's below 10 or above 108 degrees. I may just keep it.
EOTech EXPS2-2 Rockz!!!
unlike the last aimpoint mall ninja fanboy, I think it is a great "test". it would be worthwhile, if you have any other rds or hws sights, to test them as well. the whole thermal drift is an obvious issue with most likely any and all such devices due to the laws of physics. good job!
This is an incredibly idiotic "test" … stupid.
Interesting but I wonder how much of the POI shift was caused by the expansion or contraction of the mount rather than the optic itself.
Great test and interesting results! Try this out with a cheaper RDS, like a Vortex Sparc 2 or the Strikefire 2!
Thank you! As you point out, the image is projected from almost exactly the clock position of the drift. Even so, I suspect most optics will have a point of impact change when going from one temperature extreme to another. Isn't that why you re-zero on location, every time? Don't forget that altitude and temperature also affect the ballistics.
Note: I sent back my malfunctioning Eotech 511, received a refund and purchased a new Eotech XPS2-2. We have relatively little temperature variation here in South Florida, and I don't notice any POI shift in normal use with the new XPS2-2. I have no doubt that zero would change with just about any optic if I travel to North Alaska next winter. Short of an absurd change in location and the associated temperature swing, I'm perfectly happy with the Eotech's real world performance.
Can you do a control where you remove the aimpoint and reattach it, just to demonstrate that removing and remounting the optic aren't causing changes in POI.
1) You've got your LRP mount attached to the Micro H-1 backwards.