What non-NV compatible scope are you using? I'm wondering how well this would work with a sight that has a tritium illuminated reticle as a backup source, which is what makes it non-NV compatible. I have a Trijicon Tripower which I'd be curious to see if it would work with.

That would depend on what the spectrum of light the tritium source put out is. You'd need some near IR for it to still work.
Is there a market for a band-pass filter like this that is specifically made for the PVS14 that still allows the standard lens cap & accessories (like the magnifier, compass, etc) to be used?  

A buddy's Leupold w/ pig plex, Weaver Kaspa 2.5-10, Primary Arms 1-6 (original version, now sold), Primary Arms MD-09, MD-06, MD-07 micros.  Worked well w/ all of them.  As for Vault_Boy's question, if someone made a LIF style attachment that filtered anything ~700nm and shorter I would absolutely be game.  I like my Opteka IR filter for numerous reasons, but wish it sat nearly flush w/ the objective lens like the LIF does.  I do use my 3x lens a lot and would love it if I could still use the friction fit adapter (not super secure w/ the Opteka installed on the 14) for quick on, quick off.

So, question for y'all. After reading the thread about what's inside a tube and finding out the photocathode has an Aluminium Gallium Arsenide layer that acts as a band pass filter for 600nm and above, does this mean that an IR filter is just doing something that the tube already does? How much do these filters actually help?

Simple to graphically see what a 720nm IR cutoff filter does, it eliminates everything you can see with your own eyes:

I understand what it does. My question is of the photocathode already has a band pass filter film of 600 nm then that is already filtering out a large portion of visible light. Why can't they make that higher? And  how much more protection is it offering at that limit? It's only adding protection to the orange and red spectrum over what the photocathode already protects against. Correct?

You're doing it wrong, I want two of them, and a deal... Someone contact them for bulk order pricing and start a Group buy thread get back to us with some linkage.

I do not believe you understand what is going on here, the photocathode does not already have a band pass filter of 600nm, that is simply part of the absorption spectrum of gallium arsenide. The 720nm cutoff simply eliminates visible light from entering the gallium arsenide image intensifier, so it only amplifies longer wavelength IR instead.

Done.  I've been emailing with Chris back & forth for the last week and just sent him the proposal of doing a group buy.  I will keep everyone posted & abide by all GB rules if we can get this setup & going.

I guess you can understand my confusion on it based on the write up on here about what's inside the tube where it says

"The next layer to go down is an Aluminium Gallium Arsenide layer about 5 microns ( 5000nm ) thick. This acts as a bandpass filter ( above 600nm )."

So if this is incorrect then I apologize, but given the limited resources and knowledge I have in the subject to go off of leaves me to ask these questions.

Good move, subscribed.

Sorry guys, no Group Buy possible on these.  Received this reply back from Chris:

"Honestly,

I don’t have much of a discount I can give on these, so it’s probably just easier for people to buy them on the site.

Best Regards,

Chris Adams
President"

Still worth picking one up those, really reduces that bloom!

Kill joy, they should come with the sentinals anyway. Have they put them on "the website" yet or as you described do you have to call? I didn't have much luck with the website.

ETA- nevermind I found them

Got my IR filter in the mail. I bought the one Skypup linked to and recommended. Comes in a nice case and is all glass optics. Screws right into my PVS-14 lens. The lens cap still goes on perfect. The price was darn cheap for what looks like a quality lens. I am pleased with the price and construction of the lens.

Now to performance. I first used the lens in a urban area. I noticed a good dip in performance but I expected this from all the visible light pollution. I also noticed a good loss in contrast. Conditions were clear with a quarter moon out. In urban areas visible light reflects off everything and the 720 filter cuts that out so the perception is a distinct loss of performance.

Next I tried the lens in a rural area up on the farm. Conditions were clear with just starlight and a sliver of a moon. I noticed almost no loss in performance because there was little to no sky pollution. The scope was mostly amplifying light in the IR range above 720 and there was not much else to amplify.

My conclusion is you will see a noticeable drop in brightness and contrast in urban settings. In rural settings where it gets really dark, not much of any loss in performance. I am still playing with it so my findings are not set in stone yet.

Dino, try it out in the woods at dusk and dawn and see how much you can see back into the darkness even before the sun is up or down.....you will have to attenuate the gain some.

Hi Everybody.

I don't usually post here but since an abundance of people wanted to see the new filters, I thought I would provide a link.

https://www.adamsindustries.com/ADAMS-INDUSTRIES/Night-Vision-Accessories/AI-FILTER-MINUSB.html

V/R
Chris Adams
Adams Industries

thats just nifty right there.

whats the in stock status for these?