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While that is true, to make an easy example of it, if you had a 32K pixel well and 16 bit ADC, you can increase gain to 0.5e/ADC to stretch the data into a 64K count, and then divide by 2 again later to have the original number with good accuracy (I say good as a most of the conversion ratios are not in whole electrons)
But if you use gain of 7e/ADC (100KE into 14 bits in the cam mentioned in this thread) multiply that by four to make it a 16 bit number you can not then divide by 4 and multiply by seven to determine the original number, the original information is lost. Does that matter? Eye of the beholder, but I did decide months ago that for astro use I would not buy another camera which had an ADC that could not reproduce the entire range of the sensor, or at least a really good chunk of it. 16 bits and 80KE, I would probably look at good and hard.
I just see this as a sensor which may have the same colour reproduction issues as my ASI294 where it produces the most asthetically pleasing images (In terms of smooth backgrounds and dark areas) at a gain which means the effective full well capacity is a quarter of it's stated one, so it may be best suited to shorter exposures, like my 294 is. I can do 10 and even 20 minute subs if I really want faint detail, but even reasonably faint stars are pretty "Meh" if I do. Time will tell if I am right or not. I can get some pretty decent images out of my ASI294 with some work and I would assume the same would be the case with this camera. But if we are talking a marginal cost, I would jump to the 6200 for my application.
I still really want an APS-C mono CMOS cam for a bit more FOV with less hassle and cheaper filters, I can dream..
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