Thanks for your insight in the matter Ray.
Quote:
Originally Posted by Shiraz
The QHY8 has quite shallow wells for the pixel size. I guess you already know this, but to maximise the dynamic range, make sure that the gain is set to optimum (ie the saturation point is a bit below 65,000 ADU) and the offset is as low as possible without dark clipping.
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My gain is set to 1 and offset 121. Might have to revisit these values.
Quote:
Originally Posted by Shiraz
Reducing the exposure time will improve dynamic range, but the read noise is fairly high, so you will run into problems with low SNR.
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Yes that is the issue. Read noise.
Quote:
Originally Posted by Shiraz
Best might be to consider a HDR approach with normal exposures for faint detail and some very short exposures to capture the star core info.
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I thought about that but I though it's a bit extreme to have to do separate takes for the stars.