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hi Marc.
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. Reducing the exposure time will improve dynamic range, but the read noise is fairly high, so you will run into problems with low SNR if you go too short. Best might be to consider an HDR approach with normal exposures for faint detail and some very short exposures to capture the star core info.
Last edited by Shiraz; 27-08-2015 at 09:05 AM.
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