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Okay, raided my backup hard drive for some stuff, only have a small SSD on my laptop so I don't keep much of anything on there.
The first is a curvature map of 6 frames from NGC 2070.
The second is a stack of 25x5s Luminance flat frames and yes, there are some dust motes on there that I have been too lazy to clean up until now.
These are taken with my QHY9, I know the spacer that I have for the flattener to my camera is 1.5-2 mm out of spec. QHY publish that the QHY9 is 15mm from the front plate to the sensor but it is actually to the CCD chamber, an extra 1.5-2 mm from the chamber glass to the CCD itself. I found one mention of it on their forum in a single post from a couple of years back.... Very bad form if you ask me...
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