A couple of points…
1) fast newt - lots of photons concentrated on every pixel
2) very low noise camera - from what I’ve seen, there appears to be almost no CMOS pattern noise with that sensor…unlike every other sensor
3) light pollution? He’s taken a bucket load of subs, so maybe he’s exposing the background “enough”?
The short exposures would mean it would be able to reject any bad ones pretty easily. With conventional “long” exposure imaging, each sub is an average of the seeing throughout the sub length. (This is still true for 1 second subs).
The brightness is just a factor of stretching in post processing.
The days of “live viewing” will soon be upon us with the way the sensor tech is going
