Nikon 990 Infrared test page

Here is my step by step page on what I have found to work as of now. I will be trying new filters and things to try
to make the results as good as I can make them.

How to... \ Home

Here is the Harrison & Harrison set up. This is the 3 piece rig consisting of the 28mm screw in ring, the 89B or 88A glass filter
and the retaining ring that holds the filter in place.

Here is the screw in ring alone (upside down of course) to show the threads.

Here is the 89B custom made glass IR filter, and the 88A which is the same size.

And here is the top ring that holds the filter in place.
To see a side by side comparison between this and the 89B gel filter, click here.
To see the comparison between the 89B and the 88A, click here.

Total cost for this set up, $19.25 including shipping. Now that is what I call a deal. You can reach Will Harrison at

Harrison & Harrison Optical Engineers
1835 Thunderbolt Drive Unit E
Porterville, CA 93257-9300
559-782-0121 phone
559-782-0824 fax
e-mail:harrisonop@aol.com