Jack - Did you get any better luck with the new filter(s)?
Don
Yes, I did get to experiment some late yesterday and the results were mixed.
On the upside, with both the 093 and OR72 I can set an in-camera WB that is actually neutral on greens or whatever I point it at. I get a true monochrome, high-contrast result with the 093. I get closer to a normal IR result with the OR72, where sunlit greens render as whitish-cyan to tinged with pink.
On the downside, the OR72 shots still have a significant amount of green present. They also show a BUNCH of color noise in the shadows that gets so accentuated on the R<>B channel swap, they are virtually unusable for false-color. The 093 monochrome is quite nice, but it costs 5-stops when placed over the GF1 zoom... FWIW, the OR72 filter costs 2 stops.
My current thinking is:
1) Vivek is correct in that the 4/3rds lenses trim low-frequency IR effectively, so only shorter wave IR is getting through, and then only partially. This is why the 093 loses so much exposure.
2) I believe that for whatever reason, the GF1 sensor is somehow having the G channel excited by that short-wave IR that does get through, which renders Green instead of dominating Red. That would likely explain why my in-camera WB with just the 665 conversion cannot get neutral and renders as almost 100% green as well.
UNFORTUNATELY, what I wanted was a smaller IR camera solution with both AUTOFOCUS and a mid ZOOM capability, and I cannot get it with the GF1. Bottom line is I think it's going to be a great conversion for somebody willing to mount older 3rd party glass and go full manual focus. At least the GF1 has the built-in manual focus magnification that works superbly well. But because I cannot get my small, AF zoom IR camera, I suspect I will be selling this body at a significant loss...