Quote:
Originally Posted by graham.hobart
Much appreciated Ray. Will have to digest that code when not so late at night!
One question, why does the last poster say darks are a NO No for the QHY 8?
Mine is the old style square one with an updated TEC 2 cooler but still I would have thought that everyone except StrongManMike uses darks?
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The QHY8 does not have a regulated temperature, so dark calibration is less reliable than on set point cameras (unless yours has a set point capability). However, the thermal noise is so low anyway that there is no real need for darks - just do a bad pixel mapping and replacement to get rid of hot pixels and the residual thermal noise will be well below the shot noise in the sky signal. Dither will remove any fixed pattern in the residual dark current if needed, but I never found it to be a problem.