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dew on interior ccd glass
Hi Rolf,
I had a similar problem with my QHY12 on humid nights running at -25C, I changed to -15C and never had another problem.
I was thinking about using a handheld vacuum pump and install a valve instead of the QHY phillips head plug that the dessicant screws in. Then I could suck the moist air out and the valve should retain the vacuum.
However running the CCD chamber at -15C, I found the images are no different than using -25C. ( Well that's with only 5 to 10min subs).
Regards
Bill
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