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What is the production temperature?

Big thickness

Use of that?

hello can i ask a question

Is it possible to do without theos?

Hi do you have doped ZnSe?

Finger condoms 😂

If I install this type of lens in front of a flat monitor, will it look like a curved monitor?

Can’t even pronounce “Fresnel” correctly!

What's the material?

this shit goes hard

why I finish the video while I knew it was an ads..

Very flat!

How much big lens is required to attain a temperature of 10000 degree celcius

How can I get one?

How much in US$?

CO2 laser?

Very interesting glass

Beautiful thing ... i wish you'd passed light thru it & show the light spectrum effect (rainbow looking)

Based and redpilled

Ok, but wht do you say an achromat is designed to correct chrimatic aborration? Thats not ehat an chrimat does, as you said yourself, it only focuses two different wavelengths to a point, not all of them -> the lens has chromatic aborration, thats where apochromatic lenses come into play -> actually designed to remove chromatic aborration

where do I order this filter!?

What do you do with it?

good vid, very informational.

Fuse

Hi

Waw nice

How does it compare to a Cooke triplet?

ty

Can you guys make 250 mm FL telescope lens😅

why am i even watchin this

I just studied wave optics today and youtube started recommending video related to it. I didn't even search anything remotely related to it.

Cool!

my life has completed, I shall rest now in peace❤

contact please

If you would have explained too how they have to be put into the eyepiece it would have been an A+ 😅 Anyway, i have learned things from this vid so it gets a like 😉

It's pronounced "fre-nel," now "fres-nel."

Please dont fall for this crap. You should know pretty much everything about what your getting especially with night vision. This explains nothing and dosent even show the it operating. Also why list that your using a gen 2 tube?... just odd unless its all legit and your selling gen 2 nvg's for the price of gen 3's

We don't see any video of the image quality , I check your site but same it does not show the image quality of the lenses and Night vision of the " Similar PVS14" white phosphorus and full description of the item,example battery required , water proof, price etc. There is one " Similar to PVS14" already on the market from China and sincerely, is not good at all, hope this model is not the same small screen fov. with bad refresh rate and lag. We need to see in the site the Image video from it and Price . We are Not sharing email for obvious reasons ( security ) if your site is not sharing the basic information of the products. Kind Regards

whats the specification and the cost? Also, can you upload a video of looking through the optics side by side? Yours vs PVS14

where can we buy them?

Even those white gloves were a cheap clone of decent white gloves.

Choina vision 😂😂😂

Are these made in the USA? Your accent sounds like you’re from the Midwest.

Where can we get one?

music is way too loud, just dump the music altogether.

If anyone was wondering, this might be used in an infrared laser because of it's optical properties.

Quebale esa piesa

Didn't show us any of the linear properties

Do your company have centering lenses tool?