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Adam,
I have a used QHY8Pro that was originally sourced from Theo. After some initial problems with USB-based cooling instability, it is now a nice reliable camera.
Since I often loosen the IR nosepiece (accidentally), I have had some problems with condensation recently. Theo's plastic bag solution works just fine. I happened to do it yesterday and "soaked" the camera in the argon-filled bag until this afternoon, then reattached the nose inside the bag and ran the camera for a few hours. Just FYI, the cooler seems to reduce the sensor temp by about 45C.
I ran it until 10.30 tonight in the obs and noticed that it looked like I was still seeing some condensation effects. On checking, it turned out I still had condensation on the external side of the IR filter, (about 15mm diam) but nothing internal. The CCD was at -17.5C. (Hot humid night).
So the bag will fix internal condensation, but I'm still thinking about a solution for the external stuff. I'll keep you updated.
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