I was going to buy a filther so my camera can shoot in IR . 
I just read in a book that the d80 have an anti-reflective IR layer to virtually eliminate the transmission of IR light to the CCd senson or is it the optical low-pass filter in the camera? 
Anyway do anyone know about this or tried the IR filter on the nikon d80?
thanks
forgot the name of the filter but is will shot like a IR camera so say?

oh forgot to say the book say the d80 can not take IR images. I shoot some images useing my UV lights and glow paint and that works fine as for as I can tell. I do not know about IR. The book say the d40 and d70 can shoot in IR

What is IR?  As you can tell I have a lot to learn, lol

@rmtagg: IR = infrared @jocko: Seems your book is correct. The support section of the (German) Nikon homepage says the same thing. Alas, it doesn't specify if some of their DSLRs models are an exception, it only mentions cameras for the consumer market. But to me it sounds like they all have this feature.

ah, thank you :)

Attached Link: http://en.wikipedia.org/wiki/Infra_red

IR=InfraRed. http://en.wikipedia.org/wiki/Infra_red Some people use an old cheap camera to shoot in IR. All you have to do is take off the low-pass filter (voids warranty - may damage camera*) and put an Infra_Red passthrough filter on the lens. *Do NOT attempt with an expensive camera!

thanks. and i was not going to mess with my camera. just put on the filter on the len. forgot the name but I can get that fast

You're also gonna want to shoot in Raw format. TwoPynts does alot of IR-photgraphy and I'm sure he'll help out here after holidays.

As you have already gathered, the D80 is not particularly well suited for IR photography.  The ccd filters and even the newer coatings on some of the lenses inhibit the ability for good IR photography.
Saying all of this, the D80 can produce IR photos...to test for yourself before you spend $150 on a R72 filter....take a TV remote control....press the button...take a picture of the IR emitter ( while pressing the TV remote button) with your cam.  If you can see the distinct light being emitted by the TV remote, your cam will be able to take IR images.  On some cams. the remote light will be very bright and distinct...that means it is a good IR cam....on some the light will be quite dim...in other words not well suited for IR work.
You will find the D80 to be not as well suited as say the Coolpix 5000.

If you do want to do a conversion of your cam...there is a company that can do this for you....I think it is called "lifepixel".