QUOTE (Camboman @ Aug 1 2008, 07:25 AM)
The converted cameras have internal filters which allow a little visible light to be captured along with the IR. Moreso in the case of my 665nm d80 (Lifepixel-enhanced color). You can swap red-blue channels for the blue sky effect, then adjust hue/sat to taste.
I've also tried a variety of custom WBs. Using green grass as a CWB works best most of the time.
Thanks, I was also interested in this and your reply confirms what I suspected. I now have an 830nm IR converted D200 which has extraordinary DR but allows virtually no visible light through the filter. The "native" WB for my camera seems to be something like 8000K, which extracts maximum detail prior to converting to B&W since despite the greater detail most everyone is distracted by the extremely red and pink tones of a non-B&W converted file.

Here's two conversions of the same image, and in-between you can see two colors that exist in the left version that do not exist in the right version but are instead rendered with identical RGB values. While there are theoretically 65 times as many tones (working in 8 bits) in the full color conversions as there are in the B&W conversions, most of those cannot be realized because there are no non-red dominated colors; nonetheless, my guesstimate is that there are probably about 4-5 times as many useful tones in the native color image as there are in the B&W converted image.
I'm planning on converting my other D200 to the 665nm IR as soon as I can afford to do that and buy a back-up visible spectrum DSLR for my D300. I hope we get modular DSLRs with replaceable sensors, it will be a lot easier to carry around different sensors than to haul around a bunch of different camera bodies. While the possibility exists and modular DSLRs may well come to pass, I'm not entirely hopeful that market forces will provide us with lots of choices for different sensors to put into those newfangled DSLRs.