Hi Steve, yes I've had trouble taking shots without IR block filter too... Unfortunately my camera is only about 1/3 as sensitive as a 'real' CCD so I usually shoot without filters to gather every photon I can
I've found that the main effect of not using an IR block filter with the ToUCam is that interestingly it lowers the overall saturation, especially in the red. So for example stars that I know
are red seem to become less red and more bloated than when I use an IR blocking filter. I had this problem with my recent Proxima Centauri image (
http://www.iceinspace.com.au/forum/s...ad.php?t=61598), where I ended up having to blend an image taken with IR block filter as a color layer on top of an identical luminance image taken without filter to get the colors right.
This particular image didn't seem too affected though. I'm confident that the colors are right, albeit not to a scientific degree of course (I have not done calibration).
Regards,
Rolf